GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Accelerator Pedal (AP) (Gasoline)

To the left of center, on the lower bulkhead

Engine Controls Component Views in Engine Controls - 7.4L

Engine Controls Connector End Views in Engine Controls - 7.4L

Clutch Pedal Position (CPP) Switch (Cat® Diesel)

On the clutch pedal bracket

Engine Controls Component Views in Engine Controls - 7.2L

Engine Controls Connector End Views in Engine Controls - 7.2L

Clutch Pedal Position (CPP) Switch Jumper Harness (C227, 2 cavities) (Automatic Transmission) (Cat® Diesel)

In the IP harness, to the clutch pedal position (CPP) switch connector, near the brake pedal

Engine Controls Component Views in Engine Controls - 7.2L

Engine Controls Connector End Views in Engine Controls - 7.2L

Clutch Pedal Position (CPP) Switch Jumper Harness (C227, 2 cavities) (Automatic Transmission) (Gasoline)

In the IP harness, to the clutch pedal position (CPP) switch connector, near the brake pedal

Engine Controls Component Views in Engine Controls - 7.4L

Inline Harness Connector End Views in Wiring Systems

Cruise Control Switch

On the left side of the steering column

Engine Controls Component Views in Engine Controls-7.2L (Caterpillar®)

Engine Controls Connector End Views in Engine Controls-7.2L (Caterpillar®)

Cruise Control Switch

On the left side of the steering column

Cruise Control Component Views

Cruise Control Connector End Views

Multifunction Switch

On the left side of the steering wheel (contains the turn signal, windshield wiper, and windshield washer switches and controls the headlamps dimmer switch)

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Powertrain Control Module (PCM) (Cat® Diesel)

On the left rear side of the engine block

Engine Controls Component Views in Engine Controls-7.2L (Caterpillar®)

Engine Controls Connector End Views in Engine Controls-7.2L (Caterpillar®)

Powertrain Control Module (PCM) (Gasoline)

Under the left front cowl in front of driver

Engine Controls Component Views in Engine Controls-7.4L

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Powertrain Control Module (PCM) - C1 (Gasoline) (32 cavities)

Under the left front cowl in front of driver

Engine Controls Component Views in Engine Controls-7.4L

Engine Controls Connector End Views in Engine Controls-7.4L

Powertrain Control Module (PCM) - C2 (Gasoline) (24 cavities)

Under the left front cowl in front of driver

Engine Controls Component Views in Engine Controls-7.4L

Engine Controls Connector End Views in Engine Controls-7.4L

Speedo Adapter

In the right side of the IP under the MaxiFuse® block/mini-relay center

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges and Console

Engine Electrical Connector End Views in Engine Electrical

Stoplamp Switch (ABS-Air)

On the brake pedal support

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

C1 (4 cavities)

In the IP harness, to the stoplamp switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

C2 (2 cavities)

In the IP harness, to the stoplamp switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Stoplamp Switch (ABS-Hydraulic)

On the brake pedal support

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

C1 (4 cavities)

In the IP harness, to the stoplamp switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

C2 (2 cavities)

In the IP harness, to the stoplamp switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

C200 (56 cavities) (Cat® Diesel)

In the IP harness, to the engine harness, under the right side of the IP

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Inline Harness Connector End Views in Wiring Systems

C200 (56 cavities) (Gasoline)

In the IP harness, to the engine harness, under the right side of the IP

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Inline Harness Connector End Views in Wiring Systems

C218 (10 cavities) (Cat® Diesel)

In the IP harness, to the engine harness, near the right side of the interior bulkhead

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Inline Harness Connector End Views in Wiring Systems

C227 (2 cavities) (Automatic Transmission)

In the IP harness, to the clutch pedal position (CPP) switch shunt, near the brake pedal

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Inline Harness Connector End Views in Wiring Systems

C227 (2 cavities) (Manual Transmission)

In the IP harness, to the clutch pedal position (CPP) switch jumper, near the brake pedal

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Inline Harness Connector End Views in Wiring Systems

P100

On the right side of the bulkhead

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P103

On the left side of the bulkhead

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S234

In the IP harness, approximately 4 cm (1.6 in) to the right of the daytime running lights (DRL) module breakout

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S249 (Cat® Diesel)

In the IP harness, approximately 20 cm (7.9 in) to the left of the multifunction alarm module (MFAM) breakout

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