Learn about GMC Envoy 2002-2009 fuse box and relay’s locations, functions, and maintenance tips for optimal vehicle electrical system.
The GMC Envoy (2002-2009) is a midsize SUV that offers a rugged yet stylish design, appealing to those seeking both comfort and utility. Available in two main body styles—a standard five-passenger SUV and an extended-wheelbase XL version with three rows—the Envoy is ideal for families and outdoor enthusiasts alike. The Envoy also includes the performance-focused Envoy Denali trim, which enhances luxury with added features.
In terms of its electrical system, the fuse box and relays are crucial for powering key functions such as the headlights, climate control, and power windows. The fuse box is located under the hood on the driver’s side, while an additional fuse panel may be located inside the cabin, depending on the model. Relays, also found in these panels, manage high-power functions like the starter motor and fuel pump. Ensuring these components are well-maintained helps keep the Envoy’s features operational and reliable.
MUST READ: DYI – How to Check Car Fuses?
(2002-2009) GMC Envoy fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
GMC Envoy 2002-2009 fuse assignment
GMC Envoy Year of production: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Location of Fuse Boxes
Engine Compartment Fuse Block:
The fuse block is located under the hood in the engine compartment on the driver’s side of the vehicle.
- Remove the primary cover by pressing the two locking tabs.
- Remove the secondary cover by snapping off while lifting.
- To reinstall the fuse panel cover, reverse the sequence.
Rear Underseat Fuse Block:
The rear underseat fuse block is located under the rear seat on the driver’s side of the vehicle.
Fuse Box Diagrams
2002
Engine Compartment Fuse Block
List of fuses in the Engine Compartment Fuse Block (2002)
| № | Usage |
|---|---|
| Mini Fuses | |
| 1 | EGAS |
| 2 | Passenger’s Side High-Beam Headlamp |
| 3 | Passenger’s Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver’s Side High-Beam Headlamp |
| 6 | Driver’s Side Low-Beam Headlamp |
| 7 | WASH |
| 8 | ATC |
| 9 | Windshield Wipers |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | ST/LP |
| 13 | Cigarette Lighter |
| 14 | COILS |
| 15 | RIDE |
| 16 | TBD – Ignition 1 |
| 17 | Crank |
| 18 | Air Bag |
| 19 | ELEK Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | ETC |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | ENG 1 |
| 27 | Back-Up |
| 28 | Powertrain Control Module 1 |
| 29 | Oxygen Sensor |
| 30 | Air Conditioning |
| 31 | TBC |
| 50 | Passenger’s Side Trailer TRN |
| 51 | Driver’s Side Trailer TRN |
| 52 | Hazard Flashers |
| J-Case fuses | |
| 32 | Trailer |
| 33 | Anti-Lock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Ignition B |
| Micro Relays | |
| 37 | Headlamp Washer |
| 38 | Rear Window Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Wipers/Washcr |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| Solid State Relays | |
| 45 | Cooling Fan |
| 46 | HDM |
| Mini Relay | |
| 47 | Starter |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
| 49 | Fuse Puller |
Rear Underseat Fuse Block
| № | Usage |
|---|---|
| 01 | Right Door Control Module |
| 02 | Left Door Control Module |
| 03 | LGM 2 |
| 04 | TBC 3 |
| 05 | Rear Fog Lamps |
| 06 | LGM/DSM |
| 07 | TBC 2 |
| 08 | Power Seats |
| 09 | Blank |
| 10 | DDM |
| 11 | AMP |
| 12 | PDM |
| 13 | Rear Climate Controls |
| 14 | Left Rear Parking Lamps |
| 15 | Auxiliary Power 2 |
| 16 | VEH CHMSL |
| 17 | Right Rear Parking Lamps |
| 18 | LOCK |
| 19 | Blank |
| 20 | Sunroof |
| 21 | LOCKS |
| 23 | Blank |
| 24 | UNLOCK |
| 25 | Blank |
| 26 | Blank |
| 27 | OH Battery / OnStar System |
| 29 | Rainsense Wipers |
| 30 | Parking Lamps |
| 31 | TBC 4CC |
| 32 | TBC 5 |
| 33 | Front Wipers |
| 34 | VEH STOP |
| 35 | Blank |
| 36 | HVACB |
| 37 | Front Parking Lamps |
| 38 | Left Turn Signal |
| 39 | HVAC 1 |
| 40 | TBC 4 |
| 41 | Radio |
| 42 | TR PARK |
| 43 | Right Turn Signal |
| 44 | HVAC |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | TBC IG |
| 51 | Brakes |
| 52 | TBC RUN |
List of fuses in the Rear Underseat Fuse Block (2002)
2003
Engine Compartment Fuse Block
List of fuses in the Engine Compartment Fuse Block (2003)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger’s Side High-Beam Headlamp |
| 3 | Passenger’s Side Low-Beam Headlamp |
| 4 | Back-Up-Trailer Lamps |
| 5 | Driver’s Side High-Beam Headlamp |
| 6 | Driver’s Side Low-Beam Headlamp |
| 7 | Wash |
| 8 | Automatic Transfer Case |
| 9 | Windshield Wipers |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stop Lamp |
| 13 | Cigarette Lighter |
| 14 | Ignition Coils |
| 15 | Air Suspension Ride |
| 16 | TBD-Ignition 1 |
| 17 | Crank |
| 18 | Air Bag |
| 19 | Electric Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | Engine 1 |
| 27 | Back-Up |
| 28 | Powertrain Control Module 1 |
| 29 | Oxygen Sensor |
| 30 | Air Conditioning |
| 31 | Truck Body Controller |
| 32 | Trailer |
| 33 | Anti-Lock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Ignition B |
| 50 | Passenger’s Side Trailer Turn |
| 51 | Driver’s Side Trailer Turn |
| 52 | Hazard Flashers |
| Relays | |
| 37 | Blank |
| 38 | Rear Window Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Wipers/Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 45 | Cooling Fan |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
| 49 | Blank |
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2003)
| № | Usage |
|---|---|
| 01 | Right Door Control Module |
| 02 | Left Door Control Module |
| 03 | Liftgate Module 2 |
| 04 | Truck Body Controller 3 |
| 05 | Rear Fog Lamps |
| 06 | Liftgate Module / Driver Seat Module |
| 07 | Truck Body Controller 2 |
| 08 | Power Seats |
| 09 | Blank |
| 10 | Driver Door Module |
| 11 | Amplifier |
| 12 | Passenger Door Module |
| 13 | Rear Climate Controls |
| 14 | Left Rear Parking Lamps |
| 15 | Auxiliary Power 2 |
| 16 | Vehicle Center High-Mounted Stop Lamp |
| 17 | Right Rear Parking Lamps |
| 18 | Locks |
| 19 | Blank |
| 20 | Sunroof |
| 21 | Lock |
| 23 | Blank |
| 24 | Unlock |
| 25 | Blank |
| 26 | Blank |
| 27 | OH Battery / OnStar System |
| 29 | Rainsense Wipers |
| 30 | Parking Lamps |
| 31 | Truck Body Controller 4 Cruise Control |
| 32 | Truck Body Controller 5 |
| 33 | Front Wipers |
| 34 | Vehicle Stop |
| 35 | Blank |
| 36 | Heat Ventilation Air Conditioning B |
| 37 | Front Parking Lamps |
| 38 | Left Turn Signal |
| 39 | Heat Ventilation Air Conditioning 1 |
| 40 | Truck Body Controller 4 |
| 41 | Radio |
| 42 | Trailer Park |
| 43 | Right Turn Signal |
| 44 | Heat Ventilation Air Conditioning |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | Truck Body Controller Ignition |
| 51 | Brakes |
| 52 | Truck Body Controller Run |
2004
Engine Compartment Fuse Block
List of fuses in the Engine Compartment Fuse Block (2004)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger’s Side High-Beam Headlamp |
| 3 | Passenger’s Side Low-Beam Headlamp |
| 4 | Back-Up-Trailer Lamps |
| 5 | Driver’s Side High-Beam Headlamp |
| 6 | Driver’s Side Low-Beam Headlamp |
| 7 | Rear Window Washer, Headlamp Washer |
| 8 | Active Transfer Case |
| 9 | Windshield Washer |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stop Lamp |
| 13 | Cigarette Lighter |
| 14 | Ignition Coils |
| 15 | Blank |
| 16 | TBC-Ignition 1 |
| 17 | Crank |
| 18 | Air Bag |
| 19 | Trailer Electric Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | Backup |
| 27 | Engine 1 |
| 28 | Powertrain Control Module 1 |
| 29 | Oxygen Sensor |
| 30 | Air Conditioning |
| 31 | Truck Body Controller |
| 32 | Trailer |
| 33 | Anti-Lock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Ignition B |
| 50 | Passenger’s Side Trailer Turn |
| 51 | Driver’s Side Trailer Turn |
| 52 | Hazard Flashers |
| 53 | Electric Adjustable Pedal |
| 54 | A.I.R. Solenoid |
| 56 | A.I.R. Pump |
| Relays | |
| 37 | Headlamp Washer |
| 38 | Rear Window Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 45 | Cooling Fan |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| 49 | Electric Adjustable Pedal |
| 55 | A.I.R. Solenoid |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
| 49 | Blank |
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2004)
| № | Usage |
|---|---|
| 01 | Right Door Control Module |
| 02 | Left Door Control Module |
| 03 | Liftgate Module 2 |
| 04 | Truck Body Controller 3 |
| 05 | Rear Fog Lamps |
| 06 | Blank |
| 07 | Truck Body Controller 2 |
| 08 | Power Seats |
| 09 | Rear Wiper |
| 10 | Driver Door Module |
| 11 | Amplifier |
| 12 | Passenger Door Module |
| 13 | Rear Climate Controls |
| 14 | Left Rear Parking Lamps |
| 15 | Blank |
| 16 | Vehicle Center High-Mounted Stop Lamp |
| 17 | Right Rear Parking Lamps |
| 18 | Locks |
| 19 | Liftgate Module/Driver Seat Module |
| 20 | Sunroof |
| 21 | Lock |
| 23 | Blank |
| 24 | Unlock |
| 25 | Blank |
| 26 | Blank |
| 27 | OH Battery / OnStar System |
| 29 | Rainsense Wipers |
| 30 | Parking Lamps |
| 31 | Truck Body Controller Accessory |
| 32 | Truck Body Controller 5 |
| 33 | Front Wipers |
| 34 | Vehicle Stop |
| 35 | Blank |
| 36 | Heat Ventilation Air Conditioning B |
| 37 | Front Parking Lamps |
| 38 | Left Turn Signal |
| 39 | Heat Ventilation Air Conditioning 1 |
| 40 | Truck Body Controller 4 |
| 41 | Radio |
| 42 | Trailer Park |
| 43 | Right Turn Signal |
| 44 | Heat Ventilation Air Conditioning |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | Truck Body Controller Ignition |
| 51 | Brakes |
| 52 | Truck Body Controller Run |
2005
Engine Compartment Fuse Block
List of fuses in the Engine Compartment Fuse Block (2005)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger’s Side High-Beam Headlamp |
| 3 | Passenger’s Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver’s Side High-Beam Headlamp |
| 6 | Driver’s Side Low-Beam Headlamp |
| 7 | Rear Window Washer, Headlamp Washer |
| 8 | Active Transfer Case |
| 9 | Windshield Washer |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stoplamp |
| 13 | Cigarette Lighter |
| 14 | Ignition Coils |
| 15 | Electric Adjustable Pedals |
| 16 | Truck Body Controller, Ignition 1 |
| 17 | Crank |
| 18 | Airbag |
| 19 | Trailer Electric Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | Engine 1 |
| 27 | Backup |
| 28 | Powertrain Control Module 1 |
| 29 | Oxygen Sensor |
| 30 | Air Conditioning |
| 31 | Truck Body Controller |
| 32 | Trailer |
| 33 | Anti-Lock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Ignition B |
| 50 | Passenger’s Side Trailer Turn |
| 51 | Driver’s Side Trailer Turn |
| 52 | Hazard Flashers |
| 53 | Headlamp Driver Module |
| 54 | Air Injection Reactor (AIR) Solenoid |
| 56 | Air Injection Reactor (AIR) Pump |
| Relays | |
| 37 | Headlamp Washer |
| 38 | Rear Window Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 45 | Cooling Fan |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| 49 | Electric Adjustable Pedal |
| 55 | Air Injection Reactor (AIR) Solenoid |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2005)
| № | Usage |
|---|---|
| 01 | Right Door Control Module |
| 02 | Left Door Control Module |
| 03 | Liftgate Module 2 |
| 04 | Truck Body Controllers |
| 05 | Rear Fog Lamps |
| 06 | Blank |
| 07 | Truck Body Controller 2 |
| 08 | Power Seats |
| 09 | Rear Wiper |
| 10 | Driver Door Module |
| 11 | Amplifier |
| 12 | Passenger Door Module |
| 13 | Rear Climate Controls |
| 14 | Left Rear Parking Lamps |
| 15 | Blank |
| 16 | Vehicle Center High-Mounted Stop Lamp |
| 17 | Right Rear Parking Lamps |
| 18 | Locks |
| 19 | Liftgate Module/Driver Seat Module |
| 20 | Blank |
| 21 | Lock |
| 23 | Blank |
| 24 | Unlock |
| 25 | Blank |
| 26 | Blank |
| 27 | OnStar Overhead Battery / OnStar System |
| 28 | Sunroof |
| 29 | Rainsense Wipers |
| 30 | Parking Lamps |
| 31 | Truck Body Controller Accessory |
| 32 | Truck Body Controllers |
| 33 | Front Wipers |
| 34 | Vehicle Stop |
| 35 | Transmission Control Module |
| 36 | Heat Ventilation Air Conditioning B |
| 37 | Front Parking Lamps |
| 38 | Left Turn Signal |
| 39 | Heat Ventilation Air Conditioning 1 |
| 40 | Truck Body Controller 4 |
| 41 | Radio |
| 42 | Trailer Park |
| 43 | Right Turn Signal |
| 44 | Heat Ventilation Air Conditioning |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | Truck Body Controller Ignition |
| 51 | Brakes |
| 52 | Truck Body Controller Run |
2006
Engine Compartment Fuse Block
List of fuses in the Engine Compartment Fuse Block (2006)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger’s Side High-Beam Headlamp |
| 3 | Passenger’s Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver’s Side High-Beam Headlamp |
| 6 | Driver’s Side Low-Beam Headlamp |
| 7 | Rear Window Washer, Headlamp Washer |
| 8 | Active Transfer Case |
| 9 | Windshield Washer |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stoplamp |
| 13 | Cigarette Lighter |
| 14 | Not Used |
| 15 | Electric Adjustable Pedals |
| 16 | Truck Body Controller, Ignition 1 |
| 17 | Crank |
| 18 | Airbag |
| 19 | Trailer Electric Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | Engine 1 |
| 27 | Backup |
| 28 | Powertrain Control Module 1 |
| 29 | Oxygen Sensor |
| 30 | Air Conditioning |
| 31 | Truck Body Controller |
| 32 | Trailer |
| 33 | Anti-Lock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Ignition B |
| 50 | Passenger’s Side Trailer Turn |
| 51 | Driver’s Side Trailer Turn |
| 52 | Hazard Flashers |
| 53 | Headlamp Driver Module |
| 54 | Air Injection Reactor (AIR) Solenoid |
| 56 | Air Injection Reactor (AIR) Pump |
| 58 | Vehicle Stability Enhancement System (StabiliTrak) |
| Relays | |
| 37 | Headlamp Washer |
| 38 | Rear Window Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 45 | Cooling Fan |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| 49 | Electric Adjustable Pedal |
| 55 | Air Injection Reactor (AIR) Solenoid |
| 57 | Powertrain |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2006)
| № | Usage |
|---|---|
| 01 | Right Door Control Module |
| 02 | Left Door Control Module |
| 03 | Liftgate Module 2 |
| 04 | Truck Body Controllers |
| 05 | Rear Fog Lamps |
| 06 | Blank |
| 07 | Truck Body Controller 2 |
| 08 | Power Seats |
| 09 | Rear Wiper |
| 10 | Driver Door Module |
| 11 | Amplifier |
| 12 | Passenger Door Module |
| 13 | Rear Climate Controls |
| 14 | Left Rear Parking Lamps |
| 15 | Blank |
| 16 | Vehicle Center High-Mounted Stop Lamp |
| 17 | Right Rear Parking Lamps |
| 18 | Locks |
| 19 | Liftgate Module / Driver Seat Module |
| 20 | Blank |
| 21 | Lock |
| 23 | Blank |
| 24 | Unlock |
| 25 | Blank |
| 26 | Blank |
| 27 | OnStar Overhead Battery / OnStar System |
| 28 | Sunroof |
| 29 | Rainsense Wipers |
| 30 | Parking Lamps |
| 31 | Truck Body Controller Accessory |
| 32 | Truck Body Controller 5 |
| 33 | Front Wipers |
| 34 | Vehicle Stop |
| 35 | Transmission Control Module |
| 36 | Heat Ventilation Air Conditioning B |
| 37 | Front Parking Lamps |
| 38 | Left Turn Signal |
| 39 | Heat Ventilation Air Conditioning 1 |
| 40 | Truck Body Controller 4 |
| 41 | Radio |
| 42 | Trailer Park |
| 43 | Right Turn Signal |
| 44 | Heat Ventilation Air Conditioning |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | Truck Body Controller Ignition |
| 51 | Brakes |
| 52 | Truck Body Controller Run |
2007
Engine Compartment Fuse Block
L6 Engine
List of fuses in the Engine Compartment Fuse Block (L6) (2007)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger’s Side High-Beam Headlamp |
| 3 | Passenger’s Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver’s Side High-Beam Headlamp |
| 6 | Driver’s Side Low-Beam Headlamp |
| 7 | Windshield Wiper |
| 8 | Active Transfer Case |
| 9 | Windshield Washer |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stoplamp |
| 13 | Cigarette Lighter |
| 15 | Electric Adjustable Pedals |
| 16 | Truck Body Controller, Ignition 1 |
| 17 | Crank |
| 18 | Airbag |
| 19 | Trailer Electric Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | Transmission Control Module Canister |
| 27 | Backup |
| 28 | Powertrain Control Module 1 |
| 29 | Oxygen Sensor |
| 30 | Air Conditioning |
| 31 | Truck Body Controller 1 |
| 32 | Trailer |
| 33 | Anti-lock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Blower |
| 50 | Passenger’s Side Trailer Turn |
| 51 | Driver’s Side Trailer Turn |
| 52 | Hazard Flashers |
| 53 | Headlamp Driver Module |
| 54 | Air Injection Reactor (AIR) Solenoid |
| 56 | Air Injection Reactor (AIR) Pump |
| 58 | Vehicle Stability Enhancement System (StabiliTrak) |
| 59 | Regulated Voltage Control |
| Relays | |
| 37 | Headlamp Wiper |
| 38 | Rear Window Wiper/Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 45 | Cooling Fan |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| 49 | Electric Adjustable Pedal |
| 55 | Air Injection Reactor (AIR) Solenoid |
| 57 | Powertrain |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
V8 Engine
List of fuses in the Engine Compartment Fuse Block (V8) (2007)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger’s Side High-Beam Headlamp |
| 3 | Passenger’s Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver’s Side High-Beam Headlamp |
| 6 | Driver’s Side Low-Beam Headlamp |
| 7 | Windshield Wiper |
| 8 | Active Transfer Case |
| 9 | Windshield Washer |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stoplamp |
| 13 | Cigarette Lighter |
| 14 | Ignition Coils |
| 15 | Transmission Control Module (TCM) Canister Vent |
| 16 | Truck Body Controller, Ignition 1 |
| 17 | Crank |
| 18 | Airbag |
| 19 | Trailer Electric Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | Engine 1 |
| 27 | Backup |
| 28 | Powertrain Control Module 1 |
| 29 | Powertrain Control Module |
| 30 | Air Conditioning |
| 31 | Injector Bank A |
| 32 | Trailer |
| 33 | Anti-lock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Ignition B |
| 50 | Passenger’s Side Trailer Turn |
| 51 | Driver’s Side Trailer Turn |
| 52 | Hazard Flashers |
| 53 | Transmission |
| 54 | Oxygen Sensor Bank B |
| 55 | Oxygen Sensor Bank A |
| 56 | Injector Bank B |
| 57 | Headlamp Driver Module |
| 58 | Truck Body Controller 1 |
| 59 | Electric Adjustable Pedal |
| 61 | Vehicle Stability Enhancement System (StabiliTrak) |
| 62 | Regulated Voltage Control |
| Relays | |
| 37 | Headlamp Wiper |
| 38 | Rear Window Wiper/Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 45 | Cooling Fan |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| 49 | Electric Adjustable Pedal |
| 60 | Powertrain |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2007)
| № | Usage |
|---|---|
| 01 | Passenger Door Control Module |
| 02 | Driver Door Control Module |
| 03 | Liftgate Module 2 |
| 04 | Truck Body Controller 3 |
| 05 | Rear Fog Lamps |
| 06 | Blank |
| 07 | Truck Body Controller 2 |
| 08 | Power Seats |
| 09 | Rear Wiper |
| 10 | Driver Door Module |
| 11 | Amplifier |
| 12 | Passenger Door Module |
| 13 | Rear Climate Controls |
| 14 | Driver Side Rear Parking Lamps |
| 15 | Blank |
| 16 | Vehicle Center High-Mounted Stoplamp (CHMSL) |
| 17 | Passenger Side Rear Parking Lamps |
| 18 | Locks |
| 19 | Liftgate Module / Driver Seat Module |
| 20 | Blank |
| 21 | Lock |
| 23 | Blank |
| 24 | Unlock |
| 25 | Blank |
| 26 | Blank |
| 27 | OnStar Overhead Battery / OnStar System |
| 28 | Sunroof |
| 29 | Rainsense Wipers |
| 30 | Parking Lamps |
| 31 | Truck Body Controller Accessory |
| 32 | Truck Body Controller 5 |
| 33 | Front Wipers |
| 34 | Vehicle Stop |
| 35 | Transmission Control Module |
| 36 | Heat Ventilation Air Conditioning B |
| 37 | Front Parking Lamps |
| 38 | Driver Side Turn Signal |
| 39 | Heat Ventilation Air Conditioning 1 |
| 40 | Truck Body Controller 4 |
| 41 | Radio |
| 42 | Trailer Park |
| 43 | Passenger Side Turn Signal |
| 44 | Heat Ventilation Air Conditioning |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | Truck Body Controller Ignition |
| 51 | Brakes |
| 52 | Truck Body Controller Run |
2008
Engine Compartment Fuse Block
L6 Engine
List of fuses in the Engine Compartment Fuse Block (L6) (2008)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger Side High-Beam Headlamp |
| 3 | Passenger Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver Side High-Beam Headlamp |
| 6 | Driver Side Low-Beam Headlamp |
| 7 | Windshield Wiper |
| 8 | Active Transfer Case |
| 9 | Windshield Washer |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stoplamp |
| 13 | Cigarette Lighter |
| 15 | Electric Adjustable Pedals |
| 16 | Truck Body Controller, Ignition 1 |
| 17 | Crank |
| 18 | Airbag |
| 19 | Trailer Electric Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | Transmission Control Module Canister |
| 27 | Backup |
| 28 | Powertrain Control Module 1 |
| 29 | Oxygen Sensor |
| 30 | Air Conditioning |
| 31 | Truck Body Controller 1 |
| 32 | Trailer |
| 33 | Antilock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Blower |
| 50 | Passenger Side Trailer Turn |
| 51 | Driver Side Trailer Turn |
| 52 | Hazard Flashers |
| 53 | Headlamp Driver Module |
| 54 | Air Injection Reactor (AIR) Solenoid |
| 56 | Air Injection Reactor (AIR) Pump |
| 58 | Vehicle Stability Enhancement System (StabiliTrak) |
| 59 | Regulated Voltage Control |
| Relays | |
| 37 | Headlamp Wiper |
| 38 | Rear Window Wiper/Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 45 | Cooling Fan |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| 49 | Electric Adjustable Pedal |
| 55 | Air Injection Reactor (AIR) Solenoid |
| 57 | Powertrain |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
V8 Engine
List of fuses in the Engine Compartment Fuse Block (V8) (2008)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger Side High-Beam Headlamp |
| 3 | Passenger Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver Side High-Beam Headlamp |
| 6 | Driver Side Low-Beam Headlamp |
| 7 | Windshield Wiper |
| 8 | Active Transfer Case |
| 9 | Windshield Washer |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stoplamp |
| 13 | Cigarette Lighter |
| 14 | Ignition Coils |
| 15 | Transmission Control Module (TCM) Canister Vent |
| 16 | Truck Body Controller, Ignition 1 |
| 17 | Crank |
| 18 | Airbag |
| 19 | Trailer Electric Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | Engine 1 |
| 27 | Backup |
| 28 | Powertrain Control Module 1 |
| 29 | Powertrain Control Module |
| 30 | Air Conditioning |
| 31 | Injector Bank A |
| 32 | Trailer |
| 33 | Antilock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Ignition B |
| 50 | Passenger Side Trailer Turn |
| 51 | Driver Side Trailer Turn |
| 52 | Hazard Flashers |
| 53 | Transmission |
| 54 | Oxygen Sensor Bank B |
| 55 | Oxygen Sensor Bank A |
| 56 | Injector Bank B |
| 57 | Headlamp Driver Module |
| 58 | Truck Body Controller 1 |
| 59 | Electric Adjustable Pedal |
| 61 | Vehicle Stability Enhancement System (StabiliTrak) |
| 62 | Regulated Voltage Control |
| Relays | |
| 37 | Headlamp Wiper |
| 38 | Rear Window Wiper/Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 45 | Cooling Fan |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| 49 | Electric Adjustable Pedal |
| 60 | Powertrain |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2008)
| № | Usage |
|---|---|
| 01 | Passenger Door Control Module |
| 02 | Driver Door Control Module |
| 03 | Liftgate Module 2 |
| 04 | Truck Body Controller 3 |
| 05 | Rear Fog Lamps |
| 06 | Blank |
| 07 | Truck Body Controller 2 |
| 08 | Power Seats |
| 09 | Rear Wiper |
| 10 | Driver Door Module |
| 11 | Amplifier |
| 12 | Passenger Door Module |
| 13 | Rear Climate Controls |
| 14 | Driver Side Rear Parking Lamps |
| 15 | Blank |
| 16 | Vehicle Center High-Mounted Stoplamp (CHMSL) |
| 17 | Passenger Side Rear Parking Lamps |
| 18 | Locks |
| 19 | Liftgate Module/Driver Seat Module |
| 20 | Blank |
| 21 | Lock |
| 23 | Blank |
| 24 | Unlock |
| 25 | Blank |
| 26 | Blank |
| 27 | OnStar Overhead Battery / OnStar System |
| 28 | Sunroof |
| 29 | Not Used |
| 30 | Parking Lamps |
| 31 | Truck Body Controller Accessory |
| 32 | Truck Body Controller 5 |
| 33 | Front Wipers |
| 34 | Vehicle Stop |
| 35 | Transmission Control Module |
| 36 | Heat Ventilation Air Conditioning B |
| 37 | Front Parking Lamps |
| 38 | Driver Side Turn Signal |
| 39 | Heat Ventilation Air Conditioning 1 |
| 40 | Truck Body Controller 4 |
| 41 | Radio |
| 42 | Trailer Park |
| 43 | Passenger Side Turn Signal |
| 44 | Heat Ventilation Air Conditioning |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | Truck Body Controller Ignition |
| 51 | Brakes |
| 52 | Truck Body Controller Run |
2009
Engine Compartment Fuse Block
List of fuses in the Engine Compartment Fuse Block (2009)
| № | Usage |
|---|---|
| 1 | Electrically-Controlled Air Suspension |
| 2 | Passenger Side High-Beam Headlamp |
| 3 | Passenger Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver Side High-Beam Headlamp |
| 6 | Driver Side Low-Beam Headlamp |
| 7 | Windshield Wiper |
| 8 | Active Transfer Case |
| 9 | Windshield Washer |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | Stoplamp |
| 13 | Cigarette Lighter |
| 14 | Ignition Coils |
| 15 | Transmission Control Module Canister |
| 16 | Truck Body Controller, Ignition 1 |
| 17 | Crank |
| 18 | Airbag |
| 19 | Trailer Electric Brake |
| 21 | Horn |
| 22 | Ignition E |
| 23 | Electronic Throttle Control |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Brake Transmission Shift Interlock |
| 26 | Engine 1 |
| 27 | Backup |
| 28 | Engine Control Module 1 |
| 29 | Engine Control Module |
| 30 | Air Conditioning |
| 31 | Injector A |
| 32 | Trailer |
| 33 | Antilock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower |
| 36 | Ignition B |
| 50 | Passenger Side Trailer Turn |
| 51 | Driver Side Trailer Turn |
| 52 | Hazard Flashers |
| 53 | Transmission |
| 54 | Oxygen Sensor B |
| 55 | Oxygen Sensor A |
| 56 | Injector B |
| 57 | Headlamp Driver Module |
| 58 | Body Controller 1 |
| 59 | Electric Adjustable Pedals |
| 61 | Vehicle Stability Enhancement System |
| 62 | Regulated Voltage Control |
| 63 | Air Solenoid |
| 64 | Air Pump |
| 37 | Headlamp Wiper |
| 38 | Rear Window Wiper/Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| 46 | Headlamp Driver Module |
| 47 | Starter |
| 49 | Electric Adjustable Pedal |
| 60 | Powertrain |
| 69 | Air Solenoid |
| Miscellaneous | |
| 48 | Instrument Panel Battery |
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2009)
| № | Usage |
|---|---|
| 01 | Passenger Door Control Module |
| 02 | Driver Door Control Module |
| 03 | Liftgate Module 2 |
| 04 | Truck Body Controller 3 |
| 05 | Rear Fog Lamps |
| 06 | Blank |
| 07 | Truck Body Controller 2 |
| 08 | Power Seats |
| 09 | Rear Wiper |
| 10 | Driver Door Module |
| 11 | Amplifier |
| 12 | Passenger Door Module |
| 13 | Rear Climate Controls |
| 14 | Driver Side Rear Parking Lamps |
| 15 | Blank |
| 16 | Vehicle Center High-Mounted Stoplamp (CHMSL) |
| 17 | Passenger Side Rear Parking Lamps |
| 18 | Locks |
| 19 | Liftgate Module / Driver Seat Module |
| 20 | Blank |
| 21 | Lock |
| 23 | Blank |
| 24 | Unlock |
| 25 | Blank |
| 26 | Blank |
| 27 | OnStar Overhead Battery / OnStar System |
| 28 | Sunroof |
| 29 | Not Used |
| 30 | Parking Lamps |
| 31 | Truck Body Controller Accessory |
| 32 | Truck Body Controller 5 |
| 33 | Front Wipers |
| 34 | Vehicle Stop |
| 35 | Transmission Control Module |
| 36 | Heat Ventilation Air Conditioning B |
| 37 | Front Parking Lamps |
| 38 | Driver Side Turn Signal |
| 39 | Heat Ventilation Air Conditioning 1 |
| 40 | Truck Body Controller 4 |
| 41 | Radio |
| 42 | Trailer Park |
| 43 | Passenger Side Turn Signal |
| 44 | Heat Ventilation Air Conditioning |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | Truck Body Controller Ignition |
| 51 | Brakes |
| 52 | Truck Body Controller Run |
Conclusion
The GMC Envoy’s range of body styles suits different lifestyles, while its fuse box and relay components are essential for managing electrical functions across its trims. Regular inspection of these parts is key to maintaining the vehicle’s reliability and performance.
