GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Brake Pressure Differential Switch

Part of electronic brake control module, LH frame rail near center of vehicle

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Data Link Connector (DLC)

Under LH side of IP

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

Daytime Running Lamps Control Module

Under LH side of IP, taped on IP harness

Antilock Brake System Component Views

Lighting Systems Connector End Views in Lighting Systems

Electronic Brake Control Module (EBCM)

LH frame rail, near center of vehicle

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Instrument Cluster

Top LH side of IP

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

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

IP Fuse Block

LH 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 center of IP

Engine Controls Component Views in Engine Controls 6.5L

Powertrain Control Module Connector End Views in Engine Controls 6.5L

TCC/Stoplamp Switch

Under brake pedal

Lighting Systems Component Views in Lighting Systems

Antilock Brake System Connector End Views

Underhood Fuse-Relay Center

Engine compartment, LH fender

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) 4.3L

Engine compartment, LH fender

Engine Controls Component Views in Engine Controls 4.3L

VCM Connector End Views in Engine Controls 4.3L

Vehicle Control Module (VCM) 5.0L, 5.7L

Engine compartment, LH fender

Engine Controls Component Views in Engine Controls 5.0L, 5.7L

VCM Connector End Views in Engine Controls 5.0L, 5.7L

Vehicle Control Module (VCM) 7.4L

Engine compartment, LH fender

Engine Controls Component Views in Engine Controls 7.4L

VCM Connector End Views in Engine Controls 7.4L

Vehicle Speed Sensor Buffer

Below LH side of IP, near steering column

Engine Controls Component Views in Engine Controls 6.5L

Antilock Brake System Connector End Views

Wheel Speed Sensor, LF

At LF wheel

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Wheel Speed Sensor, RF

At RF wheel

Antilock Brake System Component Views

Antilock Brake System Connector End Views

C100

LH rear of engine compartment at bulk

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G101

Engine harness, near thermostat housing

Harness Routing Views in Wiring Systems

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G102

Engine harness, at LH rear of engine

Harness Routing Views in Wiring Systems

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G102 (6.5L)

LH front of engine harness, near A/C compressor

Harness Routing Views in Wiring Systems

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G103 (4.3L)

Engine harness, at generator bracket

Harness Routing Views in Wiring Systems

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G103 (5.0L, 5.7L, 7.4L)

Engine harness at RH rear of cylinder head

Harness Routing Views in Wiring Systems

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G103 (6.5L)

Engine harness, near A/C compressor

Harness Routing Views in Wiring Systems

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S101 (4.3L)

Engine harness, approx 20 cm from knock sensor breakout toward EBCM

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S101 (5.0L, 5.7L)

Engine harness, approx 10 cm from ignition coil breakout toward fuel injector breakout

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S101 (7.4L)

Engine harness, approx 5 cm from generator breakout toward C107 breakout

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S101(6.5L)

Engine harness, approx 22 cm from optical fuel temperature sensor breakout toward C100 breakout

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S102 (4.3L)

Engine harness, approx 104 cm from underhood fuse-relay center toward A/C compressor breakout

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S102 (5.0L, 5.7L)

Engine harness, approx 4 cm from A/C compressor breakout toward MAF sensor breakout

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S102 (7.4L)

Engine harness, approx 4 cm from main harness that leads to the A/C compressor breakout toward generator breakout

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S102 (6.5L)

Engine harness, approx 4 cm from main harness that leads to the blower motor breakout toward C100 breakout

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S103 (7.4L)

Engine harness, approx 4 cm from ECT sensor breakout toward C100

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S111

Engine harness, approx 4 cm from main harness breakout that leads to the underhood fuse-relay center and C100 breakouts

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S122 (4.3L)

Engine harness, approx 7 cm from G103 breakout toward transmission

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S122 (5.0L, 5.7L)

Engine harness, approx 24 cm from A/C compressor breakout toward C100

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S122 (7.4L)

Engine harness, approx 8 cm from C100 breakout toward VCM breakout

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S152 (4.3L)

Engine harness, approx 16 cm from fuel injector breakout toward G103 breakout

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S152 (5.0L, 5.7L)

Engine harness, approx 4 cm from fuel injector breakout toward G103 breakout

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S153 (4.3L)

Engine harness, approx 4 cm from the A/C compressor breakout toward transmission

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S153 (5.0L, 5.7L)

Engine harness, approx 8 cm from ignition coil breakout toward transmission

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S153 (7.4L)

Engine harness, approx 4 cm from C100 breakout toward EGR sensor breakout

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S153 (6.5L)

Engine harness, approx 27 cm from main harness breakout that leads to the underhood fuse-relay center

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S154 (4.3L)

Engine harness, approx 98 cm from underhood fuse-relay center toward A/C compressor breakout

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S154 (5.0L, 5.7L)

Engine harness, approx 4 cm from the ignition coil breakout toward the transmission

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S154 (7.4L)

Engine harness, approx 3 cm from MAF sensor breakout toward the ECT sensor breakout

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S156 (4.3L)

Engine harness, approx 14 cm from the knock sensor breakout toward the EBCM

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S156 (5.0L, 5.7L)

Engine harness, approx 8 cm from the fuel injector harness breakout toward the ignition coil breakout

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S156 (7.4L)

Engine harness, approx 10 cm from A/T ISS sensor breakout toward the fuel injector harness breakout

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S156 (6.5L)

Engine harness, approx 4 cm from the brake pressure differential switch breakout toward transmission

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S207

IP harness, approx 4 cm into VSSB breakout

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S210

IP harness, approx 4 cm into TCC/Stoplamp switch breakout

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S216

IP harness, approx 8 cm from C200 breakout toward instrument cluster breakout

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S231

IP harness, approx 18 cm from C100 breakout toward park brake warning switch breakout

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