GM Service Manual Online
For 1990-2009 cars

Name

Location

Locator View

Connector End View

A/C Compressor Refrigerant Pressure Switch

LH front of the engine compartment, mounted in the A/C compressor/condensor hose, below the A/C load switch

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Automatic Transmission Control Indicator

Center console

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Automatic Transmission Range Switch

LH side of the transmission housing

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Automatic Transmission Winter Mode Switch

Center console

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Battery

LH front of the engine compartment

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Case Adaptor

LH front of the transmission, behind the bell housing

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Cruise Control Module

RH rear of the engine compartment, attached to the lower rail

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Cruise Control Release Switch

Attached to the brake pedal

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Data Link Connector (DLC)

Attached to the I/P carrier, to the left of the steering column

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Electronic Brake/Traction Control Module (EBTCM)

LH front of the engine compartment, mounted to the lower rail

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Engine Control Module (ECM)

LH front of the engine compartment, in the ECM housing, at position 1

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Fuse Block

Mounted to the I/P, lower LH side of the steering column

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Gauge Cluster

LH side of the I/P, just to the left and above the heater and A/C control

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Heater and A/C Control

Center of the I/P, above the radio

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Ignition Switch

Mounted on the upper RH side of the steering column

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Inside Rear View Mirror

Attached to the upper center of the windshield

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Instrument Cluster

LH side of the I/P, above the steering column

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Main Case

LH side of the transmission

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Output Shaft Speed (OSS) Sensor

LH rear of the transmission housing

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Power Distribution Fuse Block

LH front of the engine compartment, attached to the ECM housing, above the battery

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Sport Mode Switch

Part of automatic transmission control shift lever

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Starter Switch

Attached to the starter motor, on the RH lower side of the engine

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Transmission Control Module (TCM)

Behind the RH side of the I/P

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Wide Open Throttle (WOT) Switch

Attached to the throttle cable

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C101

I/P wiring harness to ECM wiring harness, in the LH front of the engine compartment

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C102 (brown connector)

I/P wiring harness to engine wiring harness, in the LH front of the engine compartment, just behind the battery

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C105 (white connector)

I/P wiring harness to ECM wiring harness, at the LH front of the engine compartment, just behind the battery

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C106 (blue connector)

I/P wiring harness to ECM wiring harness, at the LH front of thee engine compartment, just behind the battery

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C110

ECM wiring harness to A/C control wiring harness, in the ECM housing

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C200A

I/P wiring harness to body wiring harness, at lower LH A-pillar

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C200B

I/P wiring harness to body wiring harness, at the lower LH A-pillar

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C205

I/P wiring harness to automatic transmission control switches, attached to the automatic transmission control base, to the right of the shift lever

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Inline Harness Connector End Views in Wiring Systems

G103

Body and I/P wiring harnesses, located at the LH front of the engine compartment, near C102, C105, and C106

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P102

Lower RH corner of the engine compartment

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P103

Lower LH A-pillar, forward of G200

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P104

LH engine compartment, at the front of the ECM housing

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P106

RH rear of the engine compartment

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P108

LH engine compartment, at the rear of the ECM housing

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P110

Rear LH corner of the engine compartment

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S127

ECM wiring harness, in the ECM housing, near the ECM connector

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S140

I/P wiring harness, near brake fluid minimum capacity sensor connector branch break off

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S204

I/P wiring harness, near multifunction relay K134 connector branch break off

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S205

I/P wiring harness, approximately 17 cm from P106

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S206

I/P wiring harness, near multifunction relay K134 connector branch break off

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S211

I/P wiring harness, near data link connector (DLC) branch break off

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S212

I/P wiring harness, near multifunction relay K134 connector branch break off

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S215

I/P wiring harness, near data link connector (DLC) branch break off

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S225

I/P wiring harness, near the G201 branch break off

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S228

I/P wiring harness, near the G201 branch break off

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S231

I/P wiring harness, near the gauge cluster connector branch break off

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S250

I/P wiring harness, near the gauge cluster connector branch break off

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S268

Body wiring harness, near the G200 branch break off

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