GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Automatic Transfer Case Shift Control Module

Left kick panel next to the parking brake

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Automatic Transmission (A4WD)

Behind the engine

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Automatic Transmission (RWD)

Behind the engine

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Brake Pedal Position Switch

Above the brake pedal

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Convenience Center

On the left side of the IP fuse block by the left kick panel

Harness Routing Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Data Link Connector (DLC)

On the lower left side of the dash

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Encoder Motor

Inside of the transfer case under the vehicle

Transfer Case Control Component Views

Transfer Case Control Connector End Views

IP Fuse Block

On the lower left side of the dash next to the left side kick panel

Harness Routing Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

Instrument Cluster

On the left side of the dash

HVAC Component Views in HVAC systems with A/C Manual

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel and Console

Underhood Fuse/Relay Center

On the left side of the dash near the battery

Electrical Center Identification Views in Wiring Systems

--

Vehicle Control Module (VCM)

Left side of the engine compartment on the lower side of the battery

Engine Controls Component Views in Engine Controls

VCM Connector End Views in Engine Controls

Vehicle Speed Sensor Front

Near Center Of Transer Case

Transfer Case Control Component Views

Engine Controls Connector End Views in Engine Controls

Vehicle Speed Sensor Rear

Near Center Of Transfer Case

Transfer Case Control Component Views

Engine Controls Connector End Views in Engine Controls

C100

Left side in the front of the dash

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C308

40 cm (15.7 in) from P301 near the transfer case

--

Inline Harness Connector End Views in Wiring Systems

C309

6 cm (2.4 in) from C308 the breakout branch

--

Inline Harness Connector End Views in Wiring Systems

C311

4 cm (1.6 in) from the vehicle speed sensor breakout on the engine harness

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G110

In the left side of the front of the dash above the battery

Harness Routing Views in Wiring Systems

--

P100

In the left side front of the dash on the left of the bulkhead

Harness Routing Views in Wiring Systems

--

P301

Under the vehicle near the transfer case

Harness Routing Views in Wiring Systems

--

S112

Engine harness, 48.5 cm (19 in) from C100 breakout towards the engine

Harness Routing Views in Wiring Systems

--

S120

Engine harness, 6 cm (2.4 in) from the EGR valve breakout toward the rear of the engine

Harness Routing Views in Wiring Systems

--

S206

In the IP harness 4.5 cm (1.8 in) from the C201 connector toward C100

Harness Routing Views in Wiring Systems

--

S213

In the IP harness 4 cm (1.6 in) from the headlamp switch connector breakout toward the headlamp

Harness Routing Views in Wiring Systems

--

S233

Behind the left hand kick panel of the DCC branch

Harness Routing Views in Wiring Systems

--

S240

Upfitter harness near the IP fuse block

Harness Routing Views in Wiring Systems

--