Chevrolet Tahoe & Suburban (GMT800) 2000-2006 fuse box and relay Diagrams

The Chevrolet Tahoe and Suburban, built on the GMT800 platform from 2000 to 2006, are iconic full-size SUVs that have earned a reputation for durability, comfort, and versatility. Designed to handle everything from daily commuting to off-road adventures and heavy-duty towing, these vehicles are equipped with robust electrical systems to support their wide array of features. Central to this system are the fuse boxes and relays, which play crucial roles in maintaining the vehicle’s electrical integrity.

The fuse box in the Chevrolet Tahoe and Suburban (2000-2006) is essential for protecting the vehicle’s electrical circuits. These circuits control vital systems, including engine management, lighting, climate control, power accessories, and the vehicle’s infotainment system. Typically, these vehicles are equipped with two primary fuse boxes: one located in the engine compartment and the other in the cabin, usually on the driver’s side, under the dashboard. The engine compartment fuse box primarily handles high-power components, such as those related to the engine and transmission, while the interior fuse box manages lower-power, comfort-oriented features.

Each fuse within these boxes is designed to blow or break the circuit in the event of an electrical overload or short circuit. This protective mechanism prevents damage to the vehicle’s electrical systems, mitigating the risk of electrical fires and costly repairs. For example, if a system like the headlights or power windows suddenly stops functioning, the first step in troubleshooting is typically to check the associated fuse for that circuit.

Relays in the Tahoe and Suburban are electrically operated switches that control the power supply to high-current systems such as the starter motor, fuel pump, and cooling fans. These relays are critical because they allow high-current systems to be operated by lower-power circuits, ensuring that the vehicle’s wiring and switches are not overloaded. A failed relay can result in significant operational issues, such as the engine not starting if the starter relay is faulty, or engine overheating if the cooling fan relay fails.

Maintaining the fuse boxes and relays in good condition is essential for the overall reliability of these vehicles. Regular inspection can help prevent electrical issues, ensuring that the Tahoe and Suburban remain dependable for both daily use and long journeys. Addressing a blown fuse or a faulty relay promptly can prevent more significant problems down the road and contribute to the longevity of the vehicle.

Understanding the roles of the fuse boxes and relays helps owners keep their Chevrolet Tahoe and Suburban in top working condition, ensuring that all electrical systems function properly and safely. This maintenance is key to preserving the vehicle’s performance and reliability over time.

MUST READ: DYI – How to Check Car Fuses?

(2000-2006) Chevrolet Tahoe & Suburban (GMT800) 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 Tahoe & Suburban (GMT800) 2000-2006 fuse assignment

• Cigar lighter (power outlet) fuses in the Chevrolet Suburban (Tahoe) are located in the Engine Compartment Fuse Box and since 2003 also in the Instrument Panel Fuse Box.
• 2000-2002 – see fuses “AUX PWR” and “CIGAR” in the Engine Compartment Fuse Box.
• 2003-2006 – see fuses “AUX HVAC” (Auxiliary Power Outlet – Console), “CIG LTR” (Cigarette Lighter) in the Engine Compartment Fuse Box, and fuse “AUX PWR 2” / “AUX PWR 2, M/GATE” (Rear Cargo Area Power Outlet) in the Instrument Panel Fuse Box.

Year of production: from 2000, 2001, 2002, 2003, 2004, 2005, 2006

Instrument Panel

The fuse box is located on the driver’s side of the instrument panel, behind the cover.

Center instrument panel relay box

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.

Engine Compartment

Auxiliary Electric Cooling Fan Fuse Block (if equipped)

It is located in the engine compartment on the driver’s side of the vehicle next to the underhood fuse box.

Fuse box diagrams

2000, 2001, 2002

Instrument Panel

Assignment of the fuses in the Instrument Panel (2000-2002)

Center instrument panel relay box

Center instrument panel relay box (2000-2002)

Engine Compartment

Assignment of the fuses and relay in the Engine Compartment (2000-2002)

2003, 2004, 2005

Instrument Panel

Assignment of the fuses in the Instrument Panel (2003-2005)

Center instrument panel relay box

Center instrument panel relay box (2003-2006)

Engine Compartment

Assignment of the fuses and relay in the Engine Compartment (2003-2005)

Auxiliary Electric Cooling Fan Fuse Block

2006

Instrument Panel

Assignment of the fuses in the Instrument Panel (2006)

Center instrument panel relay box

Center instrument panel relay box (2003-2006)

Engine Compartment

Assignment of the fuses and relay in the Engine Compartment (2006)

Auxiliary Electric Cooling Fan Fuse Block

Conclusion

For owners and enthusiasts of classic Chevrolet Tahoe & Suburban (GMT800) 2000-2006, 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.