Note: Use a special tweezers type fuse puller to remove and install type "A" fuses.
Fuses are designed to blow before all electrical wiring is damaged if there is an overload in the electrical circuits from the battery.
Note: Before replacing fuses, determine the cause of the electrical overload and make any necessary repairs.
Warning: Do not use wire instead of fuses, even for temporary installation, as this may cause damage to the electrical system and lead to fire.
1. To change the fuse, turn off the ignition.
2. Open the relay and fuse box and determine which element has burned out. The chapter "Body Electrical Equipment" also shows possible locations of relay and fuse boxes in the car's interior and underhood.
Note: The location of the fuses in different configurations may differ slightly from that shown in the figures.
Location of the fuse box in the car interior
Location of fuses (fuse box under the dashboard (to the left of the steering column))
Location of fuses (fuse box in the car interior)
Location of the fuse box in the engine compartment |
Location of fuses (additional fuse block for cooling system fans in the engine compartment) |
Note: The fuse box covers indicate the names of the electrical circuits and the fuse ratings.
3. Install only a fuse with the ampere rating indicated on the fuse box cover.
Note: Do not use a fuse with a higher current rating or any other objects (such as "bugs") in place of a blown fuse. This may cause more serious damage to the electrical network, including a fire.
4. If you do not have a fuse with the rated value, then you should use a fuse with a lower value, as close to the rated value as possible.
Note: It is recommended to keep a set of spare fuses in the vehicle.
5. If the new fuse blows immediately, this indicates a fault in the electrical system.
Table. Fuses in the engine compartment block (models since 2003.)
| Fuse | Fuse chain |
| GLOW PLUG | Not used |
| OUST FEED | Engine compartment auxiliary power line |
| STUD #1 | Trailer Wiring |
| MBEC | Fuses "SEAT SV", "RT DOOR SV" |
| BLOWER | Front heater fan motor |
| LBEC | Fuses "LOCKS", "DDM", "PDM", "ESS", "AUX PWR 2" |
| STUD 2 | Trailer Wiring |
| ABS | ABS system |
| VSES/ECAS | Suspension control system |
| IGN A | Ignition switch |
| IGN B | Ignition switch |
| LBEC 1 | Fuses "FLASH", "TBC 2A", "TBC 2B", "TBC 2C", "LT DOORS" |
| TRL PARK | Trailer parking lights |
| RR PARK | Rear right parking light and side light |
| LR PARK | Rear left parking light and side light |
| PARK LP | Parking light relay |
| STARTER | Starter relay |
| INTPARK | Interior lighting lamps |
| STOP LP | Brake lights |
| TBC BATT | Body electrical equipment control unit |
| SUNROOF | Electric sunroof drive |
| SEO B2 | (Modifications) Spotlights |
| 4WS | 4WS system |
| RR HVAC | Rear air conditioner/heater |
| AUX PWR | Connector for connecting additional equipment (center console) |
| IGN 1 | Ignition switch relay |
| PCM 1 | Powertrain control unit |
| ETC/ECM | Throttle control unit |
| INJ 1 | Ignition Coil, Fuel Injectors - Bank 1 |
| INJ 2 | Ignition Coil, Fuel Injectors - Bank 2 |
| IGN E | Instrument cluster, instrument panel, air conditioner relay, hazard warning/turn signal switch, starter relay |
| RTD | Suspension control system |
| TRL B/U | Trailer reversing lights |
| PCM B | Electronic control unit of the power unit, fuel pump |
| F/PMP | Fuel pump (relay) |
| O2A | Oxygen sensors |
| B/U LP | Reversing lights, automatic transmission selector lock system |
| RR DEFOG | Rear door glass defroster |
| HDLP-HI | High beam headlight relay |
| PRIME | Not used |
| O2B | Oxygen sensors |
| SIR | Passive safety system |
| FRT PARK | Front parking lights and side lights |
| DRL | Daytime Lighting System Lamps (Relay) |
| SEO IGN | Rear Door Glass Defroster Relay |
| TBC IGN1 | Trailer electrical equipment |
| HI HDLP-LT | High beam - left headlight |
| LH HID | Left gas discharge headlight |
| DRL | Daytime lighting system lamps |
| IPC/DIC | Instrument cluster/multifunction display |
| HVAC/ECAS | Air conditioning control unit |
| CIG LTR | Cigarette lighter |
| HI HDLP-RT | High beam - right headlight |
| HDLP-LOW | Low beam headlight relay |
| A/S SOMR | Air conditioning compressor electromagnetic clutch relay |
| A/S SOMR | Air conditioning compressor |
| RRWPR | Rear door glass wiper/washer |
| RADIO | Radio tape recorder |
| SEO B1 | HomeLink system, rear seat heaters |
| LO HDLP-LT | Low beam - left headlight |
| BTSI | Brake light switch |
| CRANK | Launch system |
| LO HDLP-RT | Low beam - right headlight |
| FOG LP | Fog light relay |
| FOG LP | Fog lights |
| HORN | Horn relay |
| W/S WASH | Windshield/Rear Door Window Washer Pump Relay |
| W/S WASH | Windshield/Rear Door Window Washer Pump |
| INFO | Audio and video system for rear passengers |
| RADIO AMP | Radio amplifier |
| RH HID | Right gas discharge headlight |
| HORN | Horn circuit fuse |
| EAP | Pedal block adjustment drive |
| TREC | 4WD control unit |
| SBA | Anti-lock braking system (ABS) |
Location of fuses (fuse box in the engine compartment)
Table. Fuses in the passenger compartment block (models since 2003.)
| Fuse | Fuse chain |
| RR Wiper | Rear Door Window Wiper Switch |
| SEO ACCY | Additional equipment |
| WS WPR | Windshield wipers |
| TBC ACCY | Electronic control unit for body electrical equipment |
| IGN 3 | Ignition system, seat heaters |
| 4WD | 4WD system |
| HTR A/C | Air conditioning and heating system |
| LOCK | Central lock relay (blocking) |
| HVAC 1 | Auto-dimming interior rearview mirror, air conditioning and heating system |
| L DOOR | Driver's door electrical equipment |
| CRUISE | Cruise control system |
| UNLOCK | Central lock relay (unlock) |
| RR FOG LP | (Modifications) Fog light |
| BRAKE | Anti-lock braking system |
| DRIVER UNLOCK | Central lock relay (driver's door unlock) |
| IGN 0 | Electronic control unit of the power unit, automatic transmission components |
| TBCIGN 0 | Electronic powertrain control unit |
| VEH CHMSL | High-mounted brake light (car and trailer) |
| LT TRLR ST/TRN | Left turn signal/trailer brake light |
| LT TRN | Left direction indicators and side lights |
| VEH STOP | Brake lights, tail lights, rear direction indicators, throttle control unit |
| Body | Wiring connector |
| RT TRLR ST/TRN | Trailer right turn signal/brake light |
| RT TRN | Right direction indicators and side lights |
| DDM | Driver's door electrical equipment control unit |
| AUX PWR 2 | Connectors for connecting additional equipment (in the luggage compartment) |
| LOCKS | Central lock |
| ECC | Rear air conditioning/heating, electric rear door |
| TBC 2C | Electronic control unit for body electrical equipment |
| FLASH | Direction indicator relay |
| CB LT DOORS | Thermal fuse for left window lifter |
| TBC2B | Electronic control unit for body electrical equipment |
| TBC 2A | Electronic control unit for body electrical equipment |
Table. Fuses of the additional fuse block for cooling fans in the engine compartment (models since 2003.)
| Fuse | Fuse chain |
| COOL/FAN | Electric motor of the cooling system fan |
| COOL/FAN | Cooling system fan motor relay fuse |
| COOL/FAN | Cooling system fan motor fuse |
| COOL/FAN 1 | Relay 1 of the electric motor of the cooling system fan |
| COOL/FAN 3 | Relay 3 of the electric motor of the cooling system fan |
| COOL/FAN 2 | Relay 2 of the electric motor of the cooling system fan |
Table. Fuses in the under-dash unit (to the left of the steering column) (models since 2003.)
| Fuse | Fuse chain |
| SEO | Additional equipment |
| TRAILER | Trailer electrical equipment |
| UPFIT | Not used |
| SL RIDE | Suspension control system |
| HDLR 2 | Additional equipment on the roof panel |
| BODY | Body electrical equipment |
| DEFOG | Rear Door Glass Defroster Relay |
| HDLNR1 | Additional equipment on the roof panel |
| SPARE RELAY | Not used |
| CB SEAT | Thermal fuse for driver and passenger seat electrical control unit |
| CB RT DOOR | Thermal fuse for right window lifter |
| SPARE | Not used |
| INFO | (Besides Chevrolet Avalanche) Instrument cluster |