The Chevrolet Colorado (2004-2012) is a mid-size pickup truck offering utility and performance. Its electrical system relies on fuses and relays to manage and protect various components.
The fuse box in the Colorado is located in both the engine compartment and inside the cabin. The engine compartment fuse box controls critical high-power systems such as the engine control unit, headlights, and cooling fans. The cabin fuse box manages lower-power systems like the interior lights, radio, and power windows. Fuses protect these circuits by disconnecting power during overloads or short circuits, preventing further damage.
Relays in the Colorado control high-current systems like the fuel pump, starter motor, and air conditioning. Relays act as switches that allow low-power circuits to safely control these high-demand systems. Proper maintenance of the fuses and relays is crucial to avoid electrical issues that could impact the vehicle’s performance or comfort features.
Regular inspection and replacement of blown fuses or faulty relays ensures that the Chevrolet Colorado operates reliably and all systems, from essential engine components to convenience features, function properly.
MUST READ: DYI – How to Check Car Fuses?
(2004-2012) Chevrolet Colorado 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.
Chevrolet Colorado 2004-2012 fuse assignment
- Cigar lighter / power outlet fuses are the fuses №2 (“AUX PWR 1”) and 33 (“AUX PWR 2”) in the Engine Compartment Fuse Box.
Year of production: from 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
Fuse box location
Engine Compartment
The fuse box is located in the engine compartment (on the driver’s side).
The trailer brake relay (If Equipped) is located on the bottom side of the battery harness.
Fuse box diagrams
2004, 2005
Assignment of the fuses and relay in the Engine Compartment (2004, 2005)
| № | Usage |
|---|---|
| 1 | Brake Switch, Stoplamps |
| 2 | Auxiliary Power 1 |
| 5 | Air Conditioning Control Head |
| 8 | Wiper/Washer Switch |
| 9 | Fog Lamps (If Equipped) |
| 10 | Ignition Transducers |
| 11 | Driver’s Side Headlamp |
| 12 | Passenger’s Side Headlamp |
| 13 | Fuel Pump |
| 14 | Wiper |
| 15 | Front Axle Actuator |
| 16 | Antilock Brake System (ABS), ABS module, Four-Wheel Drive, Gravity Sensor |
| 17 | Supplemental Inflatable Restraint System, Sensing and Diagnostic Module, Air Bag Off Switch |
| 18 | Heated Seat (If Equipped) |
| 19 | Cruise Control Switch, Inside Rearview Mirror, Transfer Case Control Module, Brake Switch, Clutch Disable |
| 20 | Electronic Throttle Control (ETC) |
| 21 | Power Door Locks (If Equipped) |
| 22 | Injectors |
| 23 | Ignition, Clutch Starter Switch, Neutral Safety Back-Up Switch, Ignition Coils 1-5, Air Conditioning Relay |
| 24 | Transmission Solenoid |
| 25 | Powertrain Control Module (PCM) |
| 26 | Back-up Lights |
| 27 | ERLS, Map Sensor, Can Purge Solenoid |
| 28 | Rear Turn/Hazard Lights |
| 29 | Driver’s Side RearTaillamp, Passenger Side Air Bag Indicator Lighting, Instrument Panel Dimming Power (2WD/4WD switch lighting) |
| 30 | Powertrain Control Module (PCM) B |
| 31 | OnStar |
| 32 | Radio |
| 33 | Auxiliary Power 2 |
| 34 | Truck Body Controller |
| 35 | Horn |
| 36 | Transfer Case Control Module |
| 37 | Turn/Hazard/Courtesy/Cargo Lamps/Mirrors |
| 38 | Cluster |
| 39 | Rear Parking Lamp 1, Passenger’s Side Taillamp, License Plate Lamps |
| 40 | Front Park/Turn Lamps, Driver and Passenger’s Side Power Window Switches Lighting |
| 41 | Climate Control Fan |
| 42 | Power Windows (If Equipped) |
| 43 | Starter Solenoid Relay |
| 44 | Antilock Brake System 2 (ABS Pump) |
| 45 | Antilock Brake System 1 (ABS Logic) |
| 46 | Power Seat Circuit Breaker/POA Seat (If Equipped) |
| 69 | Fuel Canister Vent Solenoid |
| 77 | Air Conditioning Compressor |
| 79 | Oxygen Sensors |
| 80 | Sunroof (If Equipped) |
| Relays | |
| 47 | Beam Selection |
| 50 | Air Conditioning Compressor |
| 51 | Fuel Pump, Fuel Pump Fuse |
| 52 | Fog Lamps (If Equipped) |
| 53 | Front Parking Lamp Fuse, Driver and Passenger’s Taillamp Fuse, Rear Parking Lamps |
| 54 | Headlamps |
| 55 | Horn |
| 56 | Electronic Throttle Control Fuse, Oxygen Sensor Fuse |
| 57 | Wipers (On/Off) |
| 58 | Retained Accessory Power (Power Window Fuse, Wiper/Washer Switch Fuse) |
| 59 | Ignition 3, Climate Control, Climate Control Head Fuse |
| 61 | Run/Crank, Air Bag System Fuse, Cruise Control Fuse, Ignition Fuse, Back-Up Lamps, ABS Fuse, ERLS, Front Axle, PCM-1, Injectors Fuse |
| 62 | Starter Relay (PCM Relay) |
| 63 | Wiper 2 (High/Low) |
| Miscellaneous | |
| 64 | Diode — Wiper |
| 65 | Diode — Air Conditioning, Clutch |
| 66 | Mega Fuse |
2006, 2007
Assignment of the fuses and relay in the Engine Compartment (2006, 2007)
| Name | Usage |
|---|---|
| DRL | Daylight Running Lamps |
| AUX PWR 1 | Accessory Power 1 |
| STOP | Brake Switch, Stoplamps |
| BLWR | Climate Control Fan |
| S/ROOF | Sunroof (If Equipped) |
| A/C | 2006: Air Conditioning Control Head 2007: Air Conditioning Control Head, Power Seats |
| PWR/SEAT | Power Seat Circuit Breaker (If Equipped) |
| RT HDLP | Passenger’s Side Headlamp |
| LT HDLP | Driver’s Side Headlamp |
| AUX PWR 2 | Accessory Power 2 |
| FOG/LAMP | Fog Lamps (If Equipped) |
| A/C CMPRSR | Air Conditioning Compressor |
| WSW | Wiper/Washer Switch |
| PWR/WNDW | Power Windows (If Equipped) |
| FUEL/PUMP | Fuel Pump |
| STRTR | Starter Solenoid Relay |
| WPR | Wiper |
| ABS 2 | Anti-lock Brake System 2 (ABS Pump) |
| DR/LCK | Power Door Locks (If Equipped) |
| ETC | Electronic Throttle Control (ETC) |
| O2 SNSR | 2006: Oxygen Sensors 2007: Oxygen Sensors, Air Injection Reactor (AIR) Relay |
| CRUISE | Cruise Control Switch, Inside Rearview Mirror, Transfer Case Control Module, Brake Switch, Clutch Disable |
| HTD/SEAT | Heated Seat (If Equipped) |
| AIRBAG | Supplemental Inflatable Restraint System, Sensing and Diagnostic Module |
| ABS | Anti-lock Brake System (ABS), ABS module, Four-Wheel Drive, Gravity Sensor |
| BCK/UP | Back-up Lights |
| FRT/AXLE | Front Axle Actuator |
| TRN/HAZRD REAR | Rear Turn/Hazard Lights |
| ERLS | 2006: Mass Air Flow (MAF) Sensor, Can Purge Solenoid 2007: Mass Air Flow (MAF) Sensor, Can Purge Solenoid, Air Injection Reactor (AIR) Relay |
| PCMI | Powertrain Control Module (PCM) |
| TRANS | Transmission Solenoid |
| IGN | Ignition, Clutch Starter Switch, Neutral Safety Back-Up Switch, Ignition Coils 1-5, Air Conditioning Relay |
| INJ | Injectors |
| ABS 1 | Anti-lock Brake System 1 (ABS Logic) |
| FRT PRK LAMP | Front Park/Turn Lamps, Driver and Passenger’s Side Power Window Switches Lighting |
| REAR PRK LAMP | Rear Parking Lamp 1, Passenger’s Side Taillamp, License Plate Lamps |
| REAR PRK LAMP2 | Driver’s Side Rear Taillamp, Passenger Side Airbag Indicator Lighting, Instrument Panel Dimming Power (2WD/4WD switch lighting) |
| CLSTR | Cluster |
| TRN/HAZRD FRT | Turn/Hazard/Courtesy/Cargo Lamps/Mirrors |
| TCCM | Transfer Case Control Module |
| HORN | Horn |
| TBC | Truck Body Controller |
| IGN TRNSD | Ignition Transducers |
| RDO | Radio |
| ONSTAR | OnStar® |
| CNSTR VENT | Fuel Canister Vent Solenoid |
| PCM B | Powertrain Control Module (PCM) B |
| Relays | |
| DRL | Daylight Running Lamps |
| BEAM SEL | Beam Selection |
| IGN 3 HVAC | Ignition 3, Climate Control, Climate Control Head Fuse, Power Seat Fuse |
| RAP | Retained Accessory Power (Power Window Fuse, Wiper/Washer Switch Fuse), Sunroof Fuse |
| PRK/LAMP | Front Parking Lamp Fuse, Rear Parking Lamps |
| HDLP | Headlamps |
| FOG/LAMP | Fog Lamps (If Equipped) |
| FUEL/PUMP | Fuel Pump, Fuel Pump Fuse |
| A/C CMPRSR | Air Conditioning Compressor |
| RUN/CRNK | Run/Crank, Airbag System Fuse, Cruise Control Fuse, Ignition Fuse, Back-Up Lamps, ABS Fuse, Front Axle, PCM-1, Injectors Fuse, Transmission Fuse, ERLS |
| PWR/TRN | Powertrain, Electronic Throttle Control Fuse, Oxygen Sensor Fuse |
| HORN | Horn |
| WPR 2 | Wiper 2 (High/Low) |
| WPR | Wipers (On/Off) |
| STRTR | Starter Relay (PCM Relay) |
| Miscellaneous | |
| WPR | Diode — Wiper |
| A/C CLTCH | Diode — Air Conditioning, Clutch |
| MEGA FUSE | Mega Fuse |
2008
Assignment of the fuses and relay in the Engine Compartment (2008)
| Name | Usage |
|---|---|
| DRL | Daylight Running Lamps |
| AUX PWR 1 | Accessory Power 1 |
| BLWR | Climate Control Fan |
| S/ROOF | Sunroof (If Equipped) |
| A/C | Air Conditioning Control Head, Power Seats |
| PWR/SEAT | Power Seat Circuit Breaker (If Equipped) |
| RT HDLP | Passenger Side Headlamp |
| LT HDLP | Driver Side Headlamp |
| AUX PWR 2 | Accessory Power 2 |
| FOG/LAMP | Fog Lamps (If Equipped) |
| A/C CMPRSR | Air Conditioning Compressor |
| WSW | Wiper/Washer Switch |
| RVC | Regulated Voltage Control |
| PWR/WNDW | Power Windows (If Equipped) |
| FUEL/PUMP | Fuel Pump |
| STRTR | Starter Solenoid Relay |
| WPR | Wiper |
| ABS 2 | Antilock Brake System 2 (ABS Pump) |
| DR/LCK | Power Door Locks (If Equipped) |
| ETC | Electronic Throttle Control (ETC) |
| O2 SNSR | Oxygen Sensors, Air Injection Reactor (AIR) Relay |
| CRUISE | Cruise Control Switch, Inside Rearview Mirror, Transfer Case Control Module, Brake Switch, Clutch Disable |
| HTD/SEAT | Heated Seat (If Equipped) |
| AIRBAG | Supplemental ln-atable Restraint System, Sensing and Diagnostic Module |
| ABS | Antilock Brake System (ABS), ABS Module, Four-Wheel Drive, Gravity Sensor |
| BCK/UP | Back-up Lights |
| FRT/AXLE | Front Axle Actuator |
| TRN/HAZRD REAR | Rear Turn/Hazard Lights |
| ERLS | Mass Air Flow (MAF) Sensor, Can Purge Solenoid, Air Injection Reactor (AIR) Relay |
| PCMI | Powertrain Control Module (PCM) |
| TRANS | Transmission Solenoid |
| IGN | Ignition, Clutch Starter Switch, Neutral Safety Back-Up Switch, Ignition Coils 1-5, Air Conditioning Relay |
| INJ | Injectors |
| ABS 1 | Antilock Brake System 1 (ABS Logic) |
| FRTPRK LAMP | Front Park/Turn Lamps, Driver and Passenger Side Power Window Switches Lighting |
| REAR PRK LAMP | Rear Parking Lamp 1, Passenger Side Taillamp, License Plate Lamps |
| REAR PRK LAMP 2 | Driver Side Rear Taillamp, Passenger Side Airbag Indicator Lighting, Instrument Panel Dimming Power (2WD/4WD switch lighting) |
| CLSTR | Cluster |
| TRN/HAZRD FRT | Turn/Hazard/Courtesy/Cargo Lamps/Mirrors |
| TCCM | Transfer Case Control Module |
| HORN | Horn |
| TBC | Truck Body Controller |
| IGN TRNSD | Ignition Transducers |
| RDO | Radio |
| ONSTAR | OnStar |
| CNSTR VENT | Fuel Canister Vent Solenoid |
| PCM B | Powertrain Control Module (PCM) B |
| Relays | |
| DRL | Daylight Running Lamps |
| BEAM SEL | Beam Selection |
| IGN 3 HVAC | Ignition 3, Climate Control, Climate Control Head Fuse, Power Seat Fuse |
| RAP | Retained Accessory Power (Power Window Fuse, Wiper/Washer Switch Fuse), Sunroof Fuse |
| PRK/LAMP | Front Parking Lamp Fuse, Rear Parking Lamps |
| HDLP | Headlamps |
| FOG/LAMP | Fog Lamps (If Equipped) |
| FUEL/PUMP | Fuel Pump, Fuel Pump Fuse |
| A/C CMPRSR | Air Conditioning Compressor |
| RUN/CRNK | Run/Crank, Airbag System Fuse, Cruise Control Fuse, Ignition Fuse, Back-Up Lamps, ABS Fuse, Front Axle, PCM-1, Injectors Fuse, Transmission Fuse, ERLS |
| PWR/TRN | Powertrain, Electronic Throttle Control Fuse, Oxygen Sensor Fuse |
| HORN | Horn |
| WPR 2 | Wiper 2 (High/Low) |
| WPR | Wipers (On/Off) |
| STRTR | Starter Relay (PCM Relay) |
| Miscellaneous | |
| WPR | Diode – Wiper |
| A/C CLTCH | Diode – Air Conditioning, Clutch |
| MEGA FUSE | Mega Fuse |
2009, 2010, 2011, 2012
Assignment of the fuses and relay in the Engine Compartment (2009-2012)
| Name | Usage |
|---|---|
| O2 SNSR | Oxygen Sensors, Air Injection Reactor (AIR) Relay |
| A/C | Air Conditioning Control Head, Power Seats |
| A/C CMPRSR | Air Conditioning Compressor |
| ABS | Antilock Brake System (ABS), ABS Module, Four-Wheel Drive, Gravity Sensor |
| ABS 1 | ABS 1 (ABS Logic) |
| ABS 2 | ABS 2 (ABS Pump) |
| AUX PWR 1 | Accessory Power 1 |
| AUX PWR 2 | Accessory Power 2 |
| BCK/UP | Back-up Lights |
| BLWR | Climate Control Fan |
| CLSTR | Cluster |
| CNSTR VENT | Fuel Canister Vent Solenoid |
| CRUISE | Cruise Control Switch, Inside Rearview Mirror, Transfer Case Control Module, Brake Switch, Clutch Disable |
| DR/LCK | Power Door Locks (If Equipped) |
| DRL | Daylight Running Lamps |
| ERLS | Mass Air Flow (MAF) Sensor, Can Purge Solenoid, Air Injector Reactor (AIR) Relay |
| ETC | Electronic Throttle Control (ETC) |
| FOG/LAMP | Fog Lamps (If Equipped) |
| FRT PRK LAMP | Front Park/Turn Lamps, Driver and Passenger Side Power Window Switches Lighting |
| FRT/AXLE | Front Axle Actuator |
| FSCM | Fuel System Control Module |
| BACKUP LAMP | Backup Lamp |
| HORN | Horn |
| HTD/SEAT | Heated Seat (If Equipped) |
| IGN | Ignition, Clutch Starter Switch, Neutral Safety Back-Up Switch, Ignition Coils 1-5, Air Conditioning Relay |
| INJ | Injectors |
| LT HDLP | Driver Side Headlamp |
| PCM B | Power Control Module (PCM) B |
| PCMI | Power Control Module (PCM) |
| PWR/SEAT | Power Seat Circuit Breaker (If Equipped) |
| PWR/WNDW | Power Windows (If Equipped) |
| RDO | Radio |
| REAR PRK LAMP | Rear Parking Lamp 1, Passenger Side Taillamp, License Plate Lamps |
| REAR PRK LAMP2 | Driver Side Rear Taillamp, Passenger Side Airbag Indicator Lighting, Instrument Panel Dimming Power (2WD/4WD switch lighting) |
| RT HDLP | Passenger Side Headlamp |
| RVC | Regulated Voltage Control |
| S/ROOF | Sunroof (If Equipped) |
| STOP | Stop Lamps |
| STRTR | Starter Solenoid Relay |
| TBC | Truck Body Controller |
| TCM | Transmission Control Module |
| TCCM | Transfer Case Control Module |
| TRAILER BRAKE | Trailer Brake |
| TRANS | Transmission Solenoid |
| TRN/HAZRD FRT | Turn/Hazard/Courtesy/Cargo Lamps/Mirrors |
| TRN/HAZRD REAR | Rear Turn/Hazard Lights |
| VSES/STOP | Vehicle Stability Enhancement System/Stop |
| WPR | Wiper |
| WSW | Wiper/Washer Switch |
| Relays | |
| A/C CMPRSR | Air Conditioning Compressor |
| Backup Lamp | Backup Lamp |
| BEAM SEL | Beam Selection |
| DRL | Daylight Running Lamps |
| FOG/LAMP | Fog Lamps (If Equipped) |
| HDLP | Headlamps |
| HORN | Horn |
| IGN 3 HVAC | Ignition 3, Climate Control, Climate Control Head Fuse, Power Seat Fuse |
| PRK/LAMP | Front Parking Lamp Fuse, Rear Parking Lamps |
| PWR/TRN | Powertrain, Electronic Throttle Control Fuse, Oxygen Sensor Fuse |
| RAP | Retained Accessory Power (Power Window Fuse, Wiper/Washer Switch Fuse) |
| RUN/CRNK | Run/Crank, Airbag System Fuse, Cruise Control Fuse, Ignition Fuse, Back-Up Lamps, ABS Fuse, Front Axle, PCM-1, Injectors Fuse, Transmission Fuse, ERLS |
| STRTR | Starter Relay (PCM Relay) |
| VSES | Vehicle Stability Enhancement System |
| WPR | Wipers (On/Off) |
| WPR 2 | Wiper 2 (High/Low) |
| Miscellaneous | |
| A/C CLTCH | Diode — Air Conditioning, Clutch |
| MEGA FUSE | Mega Fuse |
| WPR | Diode — Wiper |
| Fuses | |
| A | Trailer Park Lamp |
| B | Communication Interface Module |
| C | Supplemental Inflatable Restraint System, Sensing and Diagnostic Module |
| D | Trailer Auxiliary Maxi-Fuse |
Conclusion
For owners and enthusiasts of classic Chevrolet Colorado 2004-2012, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Chevrolet’s craftsmanship and innovation in the automotive industry during that era.
