Electrical System
High Voltage Devices and Wiring
Warning
Exposure to high voltage can cause shock, burns, and even death. The high voltage components in the vehicle can only be serviced by technicians with special training. High voltage components are identified by labels. Do not remove, open, take apart, or modify these components. High voltage cable or wiring has orange covering or labels. Do not probe, tamper with, cut, or modify high voltage cable or wiring.
Electrical System Overload
The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect power devices in the vehicle. If there is a problem on the road and a fuse needs to be replaced, the same amperage fuse can be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible. To check a fuse, look at the band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a fuse of the identical size and rating.
Replacing a Blown Fuse
1. Turn off the vehicle. 2. Locate the fuse puller in the engine compartment fuse block.
3. Use the fuse puller to remove the fuse from the top or side, as shown above.
4. If the fuse must be replaced immediately, borrow a replacement fuse with the same amperage from the fuse block. Choose a vehicle feature that is not needed to safely operate the vehicle. Repeat Steps 2-3.
5. Insert the replacement fuse into the empty slot of the blown fuse.
At the next opportunity, see your dealer to replace the blown fuse.
Headlamp Wiring
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.
Windshield Wipers
If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart. Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers.
If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of damage caused by electrical problems.
Danger
Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers. Use of an oversized fuse or circuit breaker can result in a vehicle fire. You and others could be seriously injured or killed.
Warning
Installation or use of fuses that do not meet GM’s original fuse specifications is dangerous. The fuses could fail, and result in a fire. You or others could be injured or killed, and the vehicle could be damaged.
See Accessories and Modifications 0 247 and General Information 0 247. To check or replace a blown fuse, see Electrical System Overload 0 268.
Engine Compartment Fuse Block
The underhood fuse block is in the engine compartment, on the driver side of the vehicle.
Caution
Do not pull the engine compartment fuse block lever, since it is intended only for service purposes. If pulled, vehicle malfunction may occur.
To remove the fuse block cover, press the clips on the cover and lift it straight up.
Caution
Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
To remove fuses, use the fuse puller and pull straight out.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses Usage
F1 Antilock Brake System Pump
F2 Starter 1
F3 DC DC Transformer 1
F4 –
F5 DC DC Transformer 2
F6 –
F7 Front Blower
F8 Starter 3
F9 – F10 – F11 –
F12 Front Wiper
F13 Starter 2
F14 –
F15 Rear Wiper
F16 –
F17 Daytime Running Lamp Left
F18 –
F19 –
F20 –
F21 –
F22 Electronic Brake Control Module
F23 Parking/Trailer Lamps
F24 Right Trailer Stoplamp/ Turnlamp
F25 Spare
F26 Daytime Running Lamp Right
F27 Left Trailer Stoplamp/ Turnlamp
F28 – F29 –
F30 Washer Pump
F31 – F32 – F33 –
F34 Horn
F35 – F36 – F37 –
F38 Spare
F39 Transmission Control Module
F40 Left Rear Bus Electrical Center/DC DC Ignition
F41 Instrument Cluster
F42 Heating, Ventilation, and Air Conditioning/ Central Gateway Module Run/Crank
F43 Reflective Light Alert Display
F44 Electronic Brake Control Module/Electric Brake Booster/Run/Crank
F45 – F46 – F47 – F48 –
F49 Interior Rearview Mirror
F50 Fuel Tank Zone Module Run/Crank
F51 Heated Steering Wheel
F52 Air Conditioning Clutch
F53 Coolant Pump
F54 – F55 – F56 –
F57 Engine Control Module/ Ignition
F58 Transmission Control Module/Ignition
F59 Engine Control Module Battery
F60 –
F61 O2 Sensor 1/ Aeroshutter/Mass Air Flow Sensor
F62 Engine Control Module – Odd
F63 O2 Sensor 2
F64 Engine Control Module – Even
F65 Engine Control Module Powertrain 1
F66 Engine Control Module Powertrain 2
F67 Engine Control Module Powertrain 3
F68 – F69 – F70 – F71 – F72 – F73 – F74 – F75 – F76 – F77 –
Relays Usage
K1 Starter 1
K2 Run/Crank
K3 Starter 3
K4 – K5 –
K6 –
K7 Engine Control Module
K8 Air Conditioning
K9 –
K10 Starter 2
Instrument Panel Fuse Block
The instrument panel fuse block is inside the center console on the passenger side of the vehicle. Remove the fuse access door by inserting a coin or tool into the slot of the access door.
To remove a fuse, use the fuse puller located in the Engine Compartment Fuse block.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses Usage
F1 Body Control Module 6
F2 Diagnostic Link/Central Gateway Module
F3 Spare/Electric Steering Column Lock
F4 – F5 –
F6 Heating, Ventilation, and Air Conditioning
F7 Body Control Module 3
F8 –
F9 Right Front Heated Seat
F10 Airbag/Seatbelt
F11 –
F12 Amplifier/Noise Control Module
F13 Body Control Module 7
F14 Left Front Heated Seat
F15 – F16 Sunroof
F17 –
F18 Instrument Cluster
F19 Body Control Module 1
F20 Rear Seat Entertainment
F21 Body Control Module 4
F22 Infotainment USB Data/ Aux Jack
F23 Body Control Module 2
F24 USB Charger/Wireless Charging
F25 Park Assist
F26 Communications Integration Module
F27 –
F28 Heating, Ventilation, and Air Conditioning/ Information Communication System Display
F29 Radio
F30 Steering Wheel Adjustment Controls
F31 Electric Brake Control Module Electric Brake Booster
F32 DC AC Inverter
F33 Driver Power Seat
F34 Passenger Power Seat
F35 Battery IEC 1 Feed
F36 Electric Power Steering
F37 Rear Seat Entertainment/USB Charge/Wireless Charging Module/ Auxiliary Power Outlet/ Lighter
F38 Body Control Module 8
F39 –
F40 –
F41 –
F42 Auxiliary Power Outlet (CB)/Lighter (Minifuse)
Rear Compartment Fuse Block
The rear compartment fuse block is behind a trim cover on the driver side of the rear storage compartment. Remove the trim cover to access the fuse block or visit your dealer. The fuse block label is located on the central bin.
Fuses Usage
F1 –
F2 Trailer Battery
F3 –
F4 Spare/Rear Blower
F5 Rear Drive Control 1
F6 –
F7 Right Window
F8 Rear Window Defogger
F9 Left Window
F10 –
F11 Trailer Reverse
F12 – F13 – F14 – F15 – F16 – F17 – F18 – F19 –
F20 Glove Box Door/Trailer Stoplamp
F21 –
F22 –
F23 –
F24 – F25 –
F26 Trailer Brake
F27 Driver Ventilated Seat/ Lumbar
F28 Passive Entry/Passive Start
F29 –
F30 Canister Vent
F31 –
F32 Heated Mirrors
F33 –
F34 Liftgate Module
F35 Fuel Tank Zone Module
F36 Passenger VentilatedSeat/Lumbar
F37 –
F38 Window Module
F39 Rear Closure
F40 Memory Seat Module
F41 Automatic Occupancy Sensor
F42 – F43 – F44 –
F45 Liftgate Motor
F46 Rear Heated Seats
F47 – F48 – F49 – F50 – F51 –
F52 Rear Drive Control 2/ Semi-active Dampening System Module
F53 Video
F54 External Object Calculating/Side Blind Zone Alert
F55 –
F56 Universal Remote/Rain Sensor
F57 Alarm Overhead Console/Theft Deterrent
Circuit Breakers Usage
CB1 – CB2 –
CB3 Rear Auxiliary Power Outlet
Relays Usage
K1 – K2 –
Download Manual