GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Cruise Control Module

In the front of the engine compartment, near the left fender

Cruise Control Component Views

Cruise Control Connector End Views

Cruise Control Switch

Part of the multi-function lever

Power and Grounding Component Views in Wiring Systems

--

Electronic Brake Control Module (EBCM)

On the left frame rail, near the center of the vehicle

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

EVO/Passlockā„¢ Module

Below the center of the IP

Steering Assist Component Views in Variable Effort Steering

Steering Assist Connector End Views in Variable Effort Steering

IP Fuse Block

In the left lower kick panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Powertrain Control Module (PCM)

Behind the center of the IP

Engine Controls Component Views in Engine Controls

Powertrain Control Module Connector End Views in Engine Controls

TCC/Stoplamp Switch

Below the center of the IP, near the brake pedal lever

Automatic Transmission Electronic Component Views or Automatic Transmission Electronic Component Views in Automatic Transmission

Automatic Transmission Inline Harness Connector End View or Automatic Transmission Inline Harness Connector End View in Automatic Transmission

Underhood Fuse-Relay Center

In the engine compartment, on the left fender

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM)

In the engine compartment, on the left fender

Engine Controls Component Views or Engine Controls Component Views or Engine Controls Component Views in Engine Controls

VCM Connector End Views or VCM Connector End Views or VCM Connector End Views in Engine Controls

Vehicle Speed Sensor (VSS) Buffer

Below the left side of the IP, near the steering column

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

C100

In the left rear of the engine compartment at the bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

Steering column harness at the base of the column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C213

IP harness, behind the left side of the IP, near the center of the vehicle

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C220

Below the IP, near P101

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G101

Engine harness, near the thermostat housing

Harness Routing Views in Wiring Systems

--

G103 (4.3L, 5.0L, 5.7L, 7.4L)

Right cylinder head in the back of the engine

Harness Routing Views in Wiring Systems

--

G103 (6.5L)

In the engine harness, at the generator bracket

Harness Routing Views in Wiring Systems

--

P100

In the left rear of the engine compartment, at the bulkhead

Harness Routing Views in Wiring Systems

--

S102 (4.3L)

In the engine harness, approximately 104 cm (41 in) from the underhood fuse-relay center, toward the A/C compressor breakout

Harness Routing Views in Wiring Systems

--

S102 (5.0L, 5.7L)

In the engine harness, approximately 4 cm (2 in) from the A/C compressor breakout, toward the MAF sensor breakout

Harness Routing Views in Wiring Systems

--

S102 (6.5L)

In the engine harness, approximately 4 cm (2 in) from the main harness breakout that leads to the blower motor, toward the C100 breakout

Harness Routing Views in Wiring Systems

--

S102 (7.4L)

In the engine harness, approximately 4 cm (2 in) from the main harness that leads to the A/C compressor breakout, toward the generator breakout

Harness Routing Views in Wiring Systems

--

S111 (6.5L)

In the engine harness, approximately 4 cm (2 in) from the main harness breakout that leads to the underhood fuse-relay center breakout and the C100 breakout

Harness Routing Views in Wiring Systems

--

S112

In the IP harness, approximately 40 cm (16 in) from C100, toward P102

Harness Routing Views in Wiring Systems

--

S114

In the IP harness, approximately 17 cm (7 in) from C100, toward IP fuse block

Harness Routing Views in Wiring Systems

--

S120 (4.3L, 7.4L)

In the engine harness, approximately 19 cm (7 in) from the C100 breakout, toward the EGR sensor breakout

Harness Routing Views in Wiring Systems

--

S120 (5.0L, 5.7L)

In the engine harness, approximately 4 cm (2 in) from the C100 breakout, toward the ECT sensor breakout

Harness Routing Views in Wiring Systems

--

S120 (6.5L)

In the engine harness, approximately 4 cm (2 in) into the main harness breakout that leads to the A/C compressor breakout

Harness Routing Views in Wiring Systems

--

S122 (4.3L)

In the engine harness, approximately 7 cm (3 in) from the G103 breakout, toward the transmission

Harness Routing Views in Wiring Systems

--

S122 (5.0L, 5.7L)

In the engine harness, approximately 24 cm (9 in) from the A/C compressor breakout, toward C100

Harness Routing Views in Wiring Systems

--

S122 (6.5L)

In the engine harness, approximately 6 cm (2 in) from the C100 breakout, toward the generator breakout

Harness Routing Views in Wiring Systems

--

S122 (7.4L)

In the engine harness, approximately 8 cm (3 in) from the C100 breakout, toward the VCM breakout

Harness Routing Views in Wiring Systems

--

S154 (4.3L)

In the engine harness, approximately 98 cm (39 in) from the underhood fuse-relay center, toward the A/C compressor breakout

Harness Routing Views in Wiring Systems

--

S154 (5.0L, 5.7L)

In the engine harness, approximately 4 cm (2 in) from the ignition coil breakout, toward the transmission

Harness Routing Views in Wiring Systems

--

S154 (7.4L)

In the engine harness, approximately 3 cm (1 in) from the MAF sensor breakout, toward the ECT sensor breakout

Harness Routing Views in Wiring Systems

--

S210

In the IP harness, approximately 4 cm (2 in) into the TCC/stoplamp switch breakout

Harness Routing Views in Wiring Systems

--

S231

In the IP harness, approximately 18 cm (7 in) from C100, toward the park brake warning switch breakout

Harness Routing Views in Wiring Systems

--

S239

In the IP harness, approximately 10 cm (4 in) into the radio breakout

Harness Routing Views in Wiring Systems

--