GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

A/C Compressor Clutch Diode (2.2 L Engine)

In the engine harness, 20 cm (7.87 in) from the A/C compressor clutch connector

HVAC Component Views

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A/C Compressor Clutch Diode (4.3 L Engine)

In the engine harness, 34.5 cm (13.5 in) from the A/C compressor clutch connector

HVAC Component Views

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A/C Compressor Clutch Relay

In the UBEC

Power and Grounding Component Views in Wiring Systems

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A/C Compressor Cycling Switch (4.3 L Engine)

At the A/C accumulator

HVAC Component Views

HVAC Connector End Views

A/C Compressor High Pressure Switch (2.2 L Engine)

At the A/C accumulator

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

To the rear of the A/C compressor

HVAC Component Views

HVAC Connector End Views

A/C Refrigerant Pressure Sensor (2.2 L Engine)

On the A/C evaporator tube

HVAC Component Views

HVAC Connector End Views

Air Temperature Valve Sensor and Motor

On the right top of the heater

HVAC Component Views in HVAC Systems with A/C - Automatic

HVAC Connector End Views in HVAC Systems with A/C - Automatic

Blower Motor (w/ Manual A/C)

At the right rear of the engine compartment

HVAC Component Views

HVAC Connector End Views

Blower Motor Relay

At the center rear of the engine compartment, on the front plenum

HVAC Component Views

HVAC Connector End Views

Blower Motor Resistor

At the left rear of the engine compartment, on the blower box

HVAC Component Views

HVAC Connector End Views

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

At the upper center of the IP, at the bottom center connector

HVAC Component Views

HVAC Connector End Views

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

At the upper center of the IP, next to the vacuum harness connector

HVAC Component Views

HVAC Connector End Views

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

At the upper center of the IP, at the top center connector

HVAC Component Views

HVAC Connector End Views

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

At the upper center of the IP

HVAC Component Views

HVAC Connector End Views

Heater Controller (w/o A/C) Connector C1

At the upper center of the IP

Heater Blower Controls Component Views in Heating and Ventilation (non-A/C)

Heater Blower Controls Connector End Views in Heating and Ventilation (non-A/C)

IP Fuse Block

To the left of the IP, near the left front door jamb switch

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

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

To the right of the engine compartment

Engine Controls Component Views in Engine Controls 2.2L

Engine Controls Connector End Views in Engine Controls 2.2L

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

To the right of the engine compartment

Engine Controls Component Views in Engine Controls 2.2L

Engine Controls Connector End Views in Engine Controls 2.2L

Underhood Bussed Electrical Center (UBEC)

On the top of the left inner wheelwell

Power and Grounding Component Views in Wiring Systems

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Underhood Bussed Electrical Center (UBEC) Connector C1 (68 Cavities) (4-door Utility Body harness)

In the UBEC

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Bussed Electrical Center (UBEC) Connector C2 (68 Cavities)

Below the UBEC

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) (4.3 L Engine)

To the right of the engine compartment

Engine Controls Component Views in Engine Controls 4.3L

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

To the right of the engine compartment

Engine Controls Component Views in Engine Controls 4.3L

Engine Controls Connector End Views in Engine Controls 4.3L

C101 (10 Cavities) (2.2 L Engine)

The engine harness to the body harness, to the 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)

The body harness to the 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) (Pickup)

The body harness to the dome harness, at the left front of the IP, at the left front window

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C209 (16 Cavities) (Utility)

The body harness to the dome harness, at the left front of the IP, at the left front window

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102 (2.2 L Engine)

At the engine harness, to the right front of the engine block, under the generator

Harness Routing Views in Wiring Systems

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G102 (4.3 L Engine)

At the engine harness to the right rear of the cylinder head

Harness Routing Views in Wiring Systems

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G103 (2.2 L Engine)

(CKT 351) At the engine harness, to the right front of the engine block, under the generator

Harness Routing Views in Wiring Systems

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G103 (4.3 L Engine)

(CKT 351) At the engine harness, to the right rear of the cylinder head

Harness Routing Views in Wiring Systems

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G105 (2.2 L Engine)

(CKT 450, CKT 451) At the engine harness, to the right rear of the engine block, near the Ignition control module

Harness Routing Views in Wiring Systems

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G105 (4.3 L Engine)

(CKT 450, CKT 451) At the engine harness, to the left rear of the cylinder head

Harness Routing Views in Wiring Systems

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G117

(CKT 850) At the body harness, to the left rear of the engine compartment, near the cruise control module

Harness Routing Views in Wiring Systems

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G200

(CKT 1850) At the body harness, to the left front of the IP, above P100

Harness Routing Views in Wiring Systems

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G201

(CKT 1850) At the body harness, to the left front of the IP, above P100

Harness Routing Views in Wiring Systems

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G203

(CKT 1050) At the 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) At the 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

At the IP bulkhead pass-through, to the left rear of the engine compartment, on the cowl

Harness Routing Views in Wiring Systems

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S103 (2.2 L Engine w/ A/C)

(CKT 350) At the 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 (4.3 L Engine w/ A/C)

(CKT 350) At the 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 (2.2 L Engine w/ A/C)

(CKT 59) At the 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 (4.3 L Engine w/ A/C)

(CKT 59) At the 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 (2.2 L Engine)

(CKT 351) At the engine harness, between the breakouts to the PCM and to the fuel injector connector, 25 cm (9.8 in) from the breakouts to the PCM

Harness Routing Views in Wiring Systems

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S106 (4.3 L Engine)

(CKT 351) At the engine harness, between the breakouts to the rear heated oxygen sensors connector and the body harness connector, 7 cm (2.75 in) from the breakout to the heated oxygen sensor connector

Harness Routing Views in Wiring Systems

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S118

(CKT 850) At the 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 (2.2 L Engine)

(CKT 351, CKT 413, CKT 451) At the engine harness, between the breakouts for the left rear and the right rear engine block grounds, 15 cm (5.9 in) from the breakout to the left rear engine grounds

Harness Routing Views in Wiring Systems

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S205

(CKT 1220) At the IP harness, between the breakouts for the radio and BCM connector C3, 8 cm (3.14 in) from the breakout to the radio

Harness Routing Views in Wiring Systems

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S215

(CKT 64) At the IP harness, in the breakout to the heater controller connectors, 10 cm (3.93 in) into the breakout

Harness Routing Views in Wiring Systems

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S217 (w/o Auto A/C)

(CKT 341) At the IP harness, in the breakout to the heater controller connectors, 6 cm (2.36 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

Harness Routing Views in Wiring Systems

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