GM Service Manual Online
For 1990-2009 cars only

Because more than one electrical system is located in each subsection, each electrical system's schematics are further broken down into operating systems, or cells. Each set of electrical system schematics will have a cell number that remains common across all vehicle platforms. Cells are organized by subsystems with most containing a circuit schematic and the associated text. For example, the cruise control schematic will be located in the cruise control subsection and the schematic title will begin with cell 34.

Some subsections may have more than one circuit schematic such as Power Distribution, Interior Lights and Air Conditioning.

Electrical Schematic Locations

System Name

Section

Subsection

Power Distribution Schematics

Body and Accessories

Wiring Systems

Ground Distribution Schematics

Body and Accessories

Wiring Systems

Retained Accessory Power Schematics

Body and Accessories

Retained Accessory Power

Auxiliary Battery Schematics

Body and Accessories

Wiring Systems

Upfitter Provision Schematics

Body and Accessories

Wiring Systems

Cigar Lighter/Auxiliary Outlet Schematics

Body and Accessories

Wiring Systems

Engine Controls Schematics

Engine

Engine Controls

Starting and Charging Schematics

Engine

Engine Electrical

Cooling Fan Schematics

Engine

Engine Cooling

Radiator Shutter Schematics

Engine

Engine Cooling

Engine Exhaust Brake Schematics

Brakes

Engine Exhaust

Cruise Control Schematics

Body and Accessories

Cruise Control

Manual Transmission Schematics

Transmission Transaxle

Manual Transmission

Inter-Axle Differential Lock Schematics

Driveline/Axle

Rear Axle Controls

Two-Speed Rear Axle Schematics

Driveline/Axle

Rear Axle Controls

Transfer Case Control Schematics

Driveline/Axle

Transfer Case

Automatic Transmission Controls Schematics

Transmission/Transaxle

Automatic Transmission or Automatic Transaxle

Horn Schematics

Body and Accessories

Horns

Brake Warning System Schematics

Brakes

Hydraulic Brakes or Air Brakes

ALC Suspension Schematics

Suspension

Automatic Level Control

Suspension Controls Schematics

Suspension

Road Sensing Suspension - RSS Real Time Dampening - RTD Air Suspension

ABS Schematics ABS/TCS Schematics

Brakes

ABS Traction Control

Steering Control Schematics

Steering

Variable Effort Steering

Park Brake System Schematics

Brakes

Park Brakes

SIR Schematics SRS Schematics

Restraints

SIR

Tire Pressure Monitor System

Suspension

Tire Pressure Monitor

Tilt/Telescoping Steering Column Schematics

Steering

Steering Wheel and Column

Data Link Connector (DLC) Schematics

Body and Accessories

Data Link Communications

Body Control Module Schematics

Body and Accessories

Body Control System

Door Control Module Schematics

Body and Accessories

Doors

Brake Booster Pump Schematics

Brakes

Hydraulic Brakes

Air Brake System Schematics

Brakes

Air Brakes

Heater Blower Controls Schematics

HVAC

Heater and Ventilation (Non-A/C)

Defogger Schematics

Body and Accessories

Stationary Windows

Heated Windshield Schematics

Body and Accessories

Stationary Windows

HVAC Blower Controls Schematics

HVAC

HVAC Systems with A/C Manual

HVAC Compressor Controls Schematics

HVAC Compressor/Condenser Fan Controls Schematics

HVAC

HVAC Systems with A/C Manual

HVAC Air Delivery Controls Schematics

HVAC

HVAC Systems with A/C Manual

HVAC Blower Controls Schematics

HVAC

HVAC Systems with A/C-Automatic (Includes Electronic and Dual Zone)

HVAC Compressor Controls Schematics

HVAC Compressor/Condenser Fan Controls Schematics

HVAC

HVAC Systems with A/C Automatic (Includes Electronic and Dual Zone)

HVAC Air Delivery Controls Schematics

HVAC

HVAC Systems with A/C-Automatic (Includes Electronic and Dual Zone)

Collision Avoidance Schematic

Body and Accessories

Collision Avoidance

Audible Warnings Schematics

Body and Accessories

Instrument Panel, Gages and Console

Backup Alarm System Schematics

Body and Accessories

Backup Alarm

Instrument Cluster: Analog Schematics

Body and Accessories

Instrument Panel, Gages and Console

Instrument Cluster: Digital Schematics

Body and Accessories

Instrument Panel, Gages and Console

Head Up Display Schematics

Body and Accessories

Instrument Panel, Gages and Console

Navigation System Schematic

Body and Accessories

Instrument Panel, Gages and Console

Driver Information System Schematics

Body and Accessories

Instrument Panel, Gages and Console

Wiper/Washer System (Standard) Schematics

Body and Accessories

Wipers/Washer Systems

Wiper/Washer System (Pulse) Schematics

Body and Accessories

Wipers/Washer Systems

Wiper/Washer System (Rear) Schematics

Body and Accessories

Wipers/Washer Systems

Headlamp Washer Schematics

Body and Accessories

Wipers/Washer Systems

Headlights Schematics

Body and Accessories

Wipers/Washer Systems

Headlights Twilight Sentinel/DRL Schematics

Body and Accessories

Lighting Systems

Headlights DRL Schematics

Body and Accessories

Lighting Systems

Fog Lights Schematics

Body and Accessories

Lighting Systems

Headlight Doors Schematics

Body and Accessories

Lighting Systems

Headlight Leveling Schematics

Body and Accessories

Lighting Systems

Exterior Lights Schematics

Body and Accessories

Lighting Systems

Backup Lights Schematics

Body and Accessories

Lighting Systems

Interior Lights Schematics

Body and Accessories

Lighting Systems

Interior Lights Dimming Schematics

Body and Accessories

Lighting Systems

Power Windows Schematics

Body and Accessories

Doors

Power Folding Top Schematics

Body and Accessories

Roof

Power Sunroof Schematics

Body and Accessories

Roof

Door Locks Schematics

Body and Accessories

Door

Keyless Entry Schematics

Body and Accessories

Keyless Entry

Theft Deterrent System Schematics

Body and Accessories

Theft Deterrent

Release System Schematics

Body and Accessories

Body Rear End

Pull Down Systems Schematics

Body and Accessories

Body Rear End

Garage Door Opener Schematics

Body and Accessories

Garage Door Opener

Power Sliding Door (PSD) Schematics

Body and Accessories

Doors

BTSI Schematics

Steering

Steering Wheel and Column

Column/Ignition

Steering

Steering Wheel and Column

Power Seat Schematics

Body and Accessories

Seats

Memory Seats Schematics

Body and Accessories

Seats

Lumbar Support Schematics

Body and Accessories

Seats

Heated Seats Schematics

Body and Accessories

Seats

Power Seat Schematics

Restraints

Seat Belts

Outside Mirrors Schematics

Body and Accessories

Doors

Automatic Day-Night Mirror

Body and Accessories

Stationary Windows

Radio/Audio Systems Schematics

Body and Accessories

Entertainment

Power Antenna Schematics

Body and Accessories

Entertainment

Steering Wheel Controls Schematics

Body and Accessories

Entertainment

Cellular Telephone Schematics

Body and Accessories

Cellular Communication

On Star Schematics

Body and Accessories

Cellular Communication