GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Clutch (4.3L, 5.0L, 5.7L)

On the front of the A/C compressor

HVAC Component Views

HVAC Connector End Views

A/C Compressor Clutch (6.5L)

On the front of the A/C compressor

HVAC Component Views

HVAC Connector End Views

A/C Compressor Clutch (7.4L)

On the front of the A/C compressor

HVAC Component Views

HVAC Connector End Views

A/C Compressor Enable Relay

In the underhood fuse - relay center, left front corner of engine compartment

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

A/C Compressor High Pressure Cutout Switch

On the rear portion of the A/C compressor

HVAC Component Views

HVAC Connector End Views

A/C Compressor Low Pressure Cutout Switch

In the low pressure refrigerant line

HVAC Component Views

HVAC Connector End Views

Air Inlet Valve

Under the IP, on the HVAC plenum, on the right side

HVAC Component Views

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Air Inlet Valve Actuator

Under the IP, on the HVAC plenum, on the right side

HVAC Component Views

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Auxiliary Blower Motor

LH rear corner of interior cabin, behind rear wheel house

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Auxiliary Blower Motor Relay, High

LH rear corner of interior cabin, behind rear wheel house

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Auxiliary Blower Motor Relay, Low

LH rear corner of interior cabin, behind rear wheel house

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Auxiliary Blower Motor Relay, Medium

LH rear corner of interior cabin, behind rear wheel house

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Auxiliary Blower Motor Resistor

LH rear corner of interior cabin, behind rear wheel house

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Blower Motor

RH rear of engine compartment, on the cowl

Heater Blower Controls Component Views in HVAC Systems Non - A/C

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Blower Motor Resistor/Relay

At the HVAC control panel

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Blower Motor Switch

Part of Heater and A/C controller, center of IP

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Convenience Center

Under the IP, on the left side

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Defrost Valve

Under the IP, on the HVAC plenum, on the right side

HVAC Component Views

--

Defrost Valve Actuator

Under the IP, on the HVAC plenum, on the right side

HVAC Component Views

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Front Auxiliary HVAC Control Module (Cargo)

On the front of the overhead console

HVAC Component Views

HVAC Connector End Views

Front Auxiliary HVAC Control Module (Passenger)

On the front of the overhead console

HVAC Component Views

HVAC Connector End Views

Heater and A/C Control Logic Module

On the front interior roof panel, behind the front auxiliary HVAC control module

HVAC Component Views

HVAC Connector End Views

Heater and A/C Controller

In the center of the IP

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Inner and Outer Mode Valve

Under the IP, on the HVAC plenum, on the right side

HVAC Component Views

--

Inner and Outer Mode Valve Actuator

Under the IP, on the HVAC plenum, on the right side

HVAC Component Views

--

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

Mode Switch

In the center of the IP, part of the heater and A/C controller

Heater Blower Controls Component Views in HVAC Systems Non - A/C

Heater Blower Controls Connector End Views in HVAC Systems Non - A/C

Powertrain Control Module (PCM)

Behind the center of the IP

Engine Controls Component Views in Engine Controls (6.5L)

Powertrain Control Module Connector End Views in Engine Controls (6.5L)

Rear Auxiliary HVAC Control Module

In the interior of the headliner, in the center of the vehicle

HVAC Component Views

HVAC Connector End Views

Rear Auxiliary Mode Valve and Seal Assembly

In the left rear of the interior, behind the wheel housing

Heater Blower Controls Component Views in HVAC Systems Non - A/C

HVAC Connector End Views

Rear Auxiliary Temperature Valve Assembly

In the left rear of the interior, behind the wheel housing

Heater Blower Controls Component Views in HVAC Systems Non - A/C

HVAC Connector End Views

Temperature Valve Actuator Motor

Under the IP, on the HVAC plenum, on the right side

HVAC Component Views

HVAC Connector End Views

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 in Engine Controls (4.3L)

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

Engine Controls Component Views in Engine Controls (7.4L)

VCM Connector End Views in Engine Controls (4.3L)

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

VCM Connector End Views in Engine Controls (7.4L)

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

C202

Left body harness, under the left side of the IP, near the brake pedal, at the convenience center

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

C405

In the left rear of the interior, behind the wheel housing

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C407

In the left rear of the interior, behind the wheel housing

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C408

In the left rear of the interior, behind the wheel housing

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

D102

Underhood fuse-relay center, in the left front of the engine compartment

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G101

Engine harness, near the thermostat housing

Power and Grounding Component Views in Wiring Systems

--

G103 (4.3L)

Engine harness, at the generator bracket

Power and Grounding Component Views in Wiring Systems

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G103 (5.0L, 5.7L, 7.4L)

Left front of engine harness, near the A/C compressor

Power and Grounding Component Views in Wiring Systems

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G103 (6.5L)

Engine harness, at the oil filler pipe bracket

Power and Grounding Component Views in Wiring Systems

--

G201

IP harness, behind the left kick panel, near the IP fuse block

Power and Grounding Component Views in Wiring Systems

--

G400

In the left rear of the interior, behind the wheel housing

Power and Grounding Component Views in Wiring Systems

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P101

Under the right side of the IP

Harness Routing Views in Wiring Systems

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S101 (5.0L, 5.7L)

Engine harness, approx 10cm (4in) from G103 breakout toward fuel injector breakout

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--

S101 (6.5L)

Engine harness, approx 11cm (4.3in) into the C101 breakout

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--

S102 (4.3L, 5.0L, 5.7L)

Engine harness, approx 104cm (41in) from the underhood fuse-relay center toward A/C compressor clutch breakout

--

--

S102 (6.5L)

Engine harness, approx 4cm (1.6in) into the C101 breakout

--

--

S102 (7.4L)

Engine harness, approx 5cm (2in) from the A/C compressor clutch breakout toward the C100 breakout

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--

S103 (4.3L)

Engine harness, approx 4cm (1.6in) from the fuel injector breakout toward G103

--

--

S103 (5.0L, 5.7L)

Engine harness, approx 4cm (1.6in) from the A/C compressor breakout toward the MAF sensor breakout

--

--

S103 (7.4L)

Engine harness, approx 8cm (3.1in) from the ECT sensor breakout toward the G101 breakout

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--

S120 (4.3L, 5.0L, 5.7L)

Engine harness, approx 11cm (4.3in) from the C100 breakout into the VCM breakout

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--

S120 (6.5L)

Engine harness, approx 4cm (1.6in) into the main harness breakout that leads to the A/C compressor breakout

--

--

S120 (7.4L)

Engine harness, approx 15cm (5.9in) from the C100 breakout into the VCM breakout

--

--

S152 (4.3L)

Engine harness, approx 16cm (6.3in) from the fuel injector breakout toward the G103 breakout

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--

S152 (5.0L, 5.7L)

Engine harness, approx 4cm (1.6in) from the fuel injector breakout toward the G103 breakout

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--

S152 (7.4L)

Engine harness, approx 15cm (5.9in) from the heated oxygen sensor (bank 2 sensor 1) breakout toward P101

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--

S201

IP harness, approx 4cm (1.6in) from the park brake warning switch breakout toward the data link connector breakout

--

--

S202

IP harness, approx 7cm (2.8in) into the VSSB breakout

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--

S215

IP harness, approx 4cm (1.6in) from the radio breakout toward the power antenna assembly breakout

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--

S249

Left hand body harness, approx 20cm (7.9in) from the convenience center connector C202

--

--

S307

Rear auxiliary heater and A/C harness, approx 33cm (13in) from the rear auxiliary HVAC control module breakout toward the front auxiliary HVAC control module

--

--

S318

Rear auxiliary heater and A/C harness, approx 39cm (15.4in) from the front auxiliary HVAC control module connector

--

--

S319

Rear auxiliary heater and A/C harness, approx 63cm (24.8in) from the front auxiliary HVAC control module connector

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--

S320

Rear auxiliary heater and A/C harness, approx 82cm (32.3in) from the front auxiliary HVAC control module connector

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--

S321

Rear auxiliary heater and A/C harness, approx 13cm (5.1in) from the rear auxiliary HVAC control module breakout toward the front auxiliary HVAC control module

--

--

S400

Left body harness, approx 7cm (2.8in) from the C404 connector breakout toward the center high mounted stop lamp

--

--

S400 (Upfitter Provisions)

Left body harness, approx 7cm (2.8in) from the C407 connector breakout toward the C404 connector breakout

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--

S404

Left body harness, approx 33cm (13in) from the C409 connector breakout toward the C417 connector breakout

--

--

S405

Rear A/C harness, approx 7cm (2.8in) from the blower motor breakout toward the blower motor resistor relay breakout

--

--

S411

Rear A/C harness, approx 13cm (5.1in) from the blower motor breakout toward the rear auxiliary temperature valve assembly breakout

--

--

S412

Rear A/C harness, approx 23cm (9.1in) from the blower motor relay breakout toward the blower motor breakout

--

--

S413

Rear A/C harness, approx 15cm (5.9in) fron the blower motor resistor connector

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