GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Clutch Coil

Part of the A/C compressor

HVAC Component Views

HVAC Connector End Views

A/C Compressor Clutch Diode (2.2L)

20 cm (7.87 in) toward the main engine harness from the A/C compressor connector

HVAC Component Views

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A/C Compressor Clutch Diode (4.3L)

In the engine harness breakout, 8 cm (3.15 in) from the breakout to the A/C compressor high pressure switch

HVAC Component Views

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A/C Compressor Relay

In the underhood fuse block

Electrical Center Identification Views in Wiring Systems

Electrical Center Identification Views in Wiring Systems

A/C Compressor High Pressure Cutoff Switch (4.3L)

Rear of the A/C compressor

HVAC Component Views

HVAC Connector End Views

A/C Compressor Cycling Switch (4.3L)

At the A/C accumulator

HVAC Component Views

HVAC Connector End Views

A/C Refrigerant Pressure Sensor (2.2L)

On the A/C evaporator tube

HVAC Component Views

HVAC Connector End Views

Blower Motor (Non-A/C)

RR of the engine compartment

HVAC Component Views

HVAC Connector End Views

Blower Motor (w/ Manual A/C)

RR of the engine compartment

HVAC Component Views

HVAC Connector End Views

Blower Motor Relay

Center rear of the engine compartment, on the plenum front panel

HVAC Component Views

HVAC Connector End Views

Blower Motor Resistor (Manual A/C)

LR of the engine compartment, on the blower box

HVAC Component Views

HVAC Connector End Views

Blower Motor Resistor (Non-A/C)

LR of the engine compartment, on the blower box

HVAC Component Views

HVAC Connector End Views

Electric Actuator (Temperature)

Right top of the heater

HVAC Component Views

HVAC Connector End Views

Heater and A/C Controller

In the center of the IP

HVAC Component Views

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Heater and A/C Controller (w/ Manual A/C) Connector C1 (10 Cavities) (Heater Control Lamp)

Bottom center connector

HVAC Component Views

HVAC Connector End Views

Heater and A/C Controller (w/ Manual A/C) Connector C2 (3 Cavities) (Heater Control Lamp)

Next to the vacuum harness connector

HVAC Component Views

HVAC Connector End Views

Heater and A/C Controller (w/ Manual A/C) Connector C3 (3 Cavities)

Top center connector

HVAC Component Views

HVAC Connector End Views

Heater and A/C Controller (w/ Manual A/C) Connector C4 (5 Cavities)

Upper center of the IP

HVAC Component Views

HVAC Connector End Views

Heater and A/C Controller (w/ Manual A/C) Connector C5 (4 Cavities) (Except Base Pickup)

Between connectors C1 and C3

HVAC Component Views

HVAC Connector End Views

Heater Controller (Non-A/C)

In the center of the IP

HVAC Component Views

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Heater Controller Connector (Non- A/C) C1 (10 Cavities)

Upper center of the IP

HVAC Component Views

HVAC Connector End Views

Heater Controller Connector (Non- A/C) C2 (5 Cavities)

Next to the vacuum harness connector

HVAC Component Views

HVAC Connector End Views

IP Fuse Block

LH of the IP, near the side door jamb switch

Power and Grounding Component Views in Wiring Systems

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Powertrain Control Module (PCM)

On the right side of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

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Powertrain Control Module (PCM) Connector C1 (2.2L)

On the right side of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

Powertrain Control Module Connector End Views in Engine Controls - 2.2L

Powertrain Control Module (PCM) Connector C2 (2.2L)

On the right side of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

Powertrain Control Module Connector End Views in Engine Controls - 2.2L

Underhood Fuse Block

On the top of the left inner wheelwell

Power and Grounding Component Views in Wiring Systems

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Underhood Fuse Block Connector C1 (68 Cavities) (Body)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C2 (68 Cavities) (Engine)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) (4.3L)

Right side of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

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Vehicle Control Module (VCM) (4.3L) Connector C3 (Clear) (32 Cavities)

Right side of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

VCM Connector End Views in Engine Controls - 4.3L

C101 (16 Cavities) (2.2L)

Engine harness to body harness, right of the engine compartment, near the PCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101 (10 Cavities) (4.3L)

Engine harness to body harness, right of the engine compartment, near the VCM

Harness Routing Views

in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C203 (116 Cavities)

Body harness to IP harness, to the right of the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C209 (16 Cavities)

Body harness to dome harness, at the LF of the IP, at the LF window

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102 (2.2L)

(CKT 350) At the engine harness, RF of the engine block, under the generator

Harness Routing Views in Wiring Systems

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G102 (4.3L)

(CKT 350) Engine harness, RR of the cylinder head

Harness Routing Views in Wiring Systems

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G103 (4.3L)

(CKT 351) Engine harness, RR of the cylinder head

Harness Routing Views in Wiring Systems

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G105 (4.3L)

(CKT 450, CKT 451) Engine harness, LR of the cylinder head

Harness Routing Views in Wiring Systems

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G117

(CKT 850) Body harness, to the LR of the engine compartment, near the cruise control module

Harness Routing Views in Wiring Systems

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G200

(CKT 1850) Body harness, to the LF of the IP, above P100

Harness Routing Views in Wiring Systems

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G201

(CKT 1850) Body harness, to the LF of the IP, above P100

Harness Routing Views in Wiring Systems

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G203

(CKT 1050) Body harness, to the right of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

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G204

(CKT 1050) Body harness, to the right of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

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P100

IP bulkhead pass-through, LR of the engine compartment, on the cowl

Harness Routing Views in Wiring Systems

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S103 (2.2L Engine w/ A/C)

(CKT 350) Engine harness, on the anode side of the A/C compressor clutch diode, in the breakout to the A/C compressor and cutoff switch

Harness Routing Views in Wiring Systems

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S103 (4.3L Engine w/ A/C)

(CKT 350) Engine harness, on the anode side of the A/C compressor clutch diode, in the breakout to the A/C compressor and cutoff switch

Harness Routing Views in Wiring Systems

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S104 (2.2L Engine w/ A/C)

(CKT 59) Engine harness, on the cathode side of the A/C compressor clutch diode, in the breakout to the A/C compressor and cutoff switch

Harness Routing Views in Wiring Systems

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S104 (4.3L Engine w/ A/C)

(CKT 59) Engine harness, on the cathode side of the A/C compressor clutch diode, in the breakout to the A/C compressor and cutoff switch

Harness Routing Views in Wiring Systems

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S106 (4.3L)

(CKT 351) Engine harness, between the breakouts to the rear heated oxygen sensors connector and the body harness connector, 7 cm (2.8 in) from the breakout to the heated oxygen sensor connector

Harness Routing Views in Wiring Systems

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S118

(CKT 850) Body harness, between the breakouts to the blower motor and the blower motor relay

Harness Routing Views in Wiring Systems

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S152 (4.3L)

(CKT 351, CKT 413, CKT 451) Engine harness, between the breakouts for the LR and RR engine block grounds, 13 cm (5.1 in) from the breakout to the LR engine grounds

Harness Routing Views in Wiring Systems

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S205

(CKT 1220) IP harness, between the breakouts for the radio and BCM connector C3, 8 cm (3.2 in) from the breakout to the radio

Harness Routing Views in Wiring Systems

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S215 (w/o Auto A/C)

(CKT 64) IP harness, in the breakout to the heater controller connectors, 10 cm (3.9 in) into the breakout

Harness Routing Views in Wiring Systems

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S217 (w/o Auto A/C)

(CKT 341) IP harness, in the breakout to the heater controller connectors, 6 cm (2.4 in) into the breakout

Harness Routing Views in Wiring Systems

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Splice Pack SP202

(CKT 379, CKT 1850) Strapped to the body harness, at the left center of the IP

Harness Routing Views in Wiring Systems

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Splice Pack SP203

(CKT 1050) IP harness, on the IP, in front of the ashtray, strapped to the body harness

Harness Routing Views in Wiring Systems

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