GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Audio Alarm Module

In the convenience center

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Convenience Center

Under the left side of the IP, on the bulkhead

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Daytime Running Lamps (DRL) Module

Under the left side of the IP, taped to the IP harness

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Electronic Brake Control Module (EBCM)

Near Brake Master Cylinder, at LF Wheelhousing

Antilock Brake System Component Views in ABS/Traction Control

Antilock Brake System Connector End Views in ABS/Traction Control

Electronic Variable Orifice (EVO)/Passlock Module

Under the center of the IP

Theft Deterrent System Component Views in Theft Deterrent

Theft Deterrent System Connector End Views in Theft Deterrent

Engine Coolant Temperature Sender (Gas)

LH Cylinder Head, near #1 Spark Plug

Cooling System Component Views in Engine Cooling

Cooling System Connector End Views in Engine Cooling

Fuel Pump (Diesel)

Inside LH Frame Rail, below LF Door

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Fuel Pump and Sender

In Fuel Tank

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Fuel Pump Balance Module

Inside LH Frame Rail, near Transmission Crossmember

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Fuel Pump Balance Relay

On Fuel Pump Balance Module, inside LH Frame Rail, near Transmission Crossmember

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

Fuel Pump Relay

In Underhood Fuse-Relay Center, LR of Engine Compartment, on Fender

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Fuel Tank Pressure Sensor

In Fuel Tank

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Generator

LH Front of Engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Ignition Coil

RR of Engine

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views

Inflatable Restraint Sensing and Diagnostic Module (SDM)

Under Carpet Beneath Drivers Seat

SIR Component Views in SIR

SIR Connector End Views in SIR

Instrument Cluster

On the upper left end of the IP, above the steering column

Instrument Panel, Gages, and Console Component Views

Instrument Panel, Gages, and Console Connector End Views

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

Low Coolant Level Indicator Module (Diesel)

Under center of IP

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Low Coolant Level Sensor (Diesel)

In Coolant Reservoir, RH of Engine Compartment

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Powertrain Control Module (PCM) (Diesel)

Under RH end of IP, above Blower Motor, behind IP Compartment Box

Engine Controls Component Views in Engine Controls

Powertrain Control Module Connector End Views in Engine Controls

Underhood Fuse Block

In the left rear side of the engine compartment, on the fender

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) (Gas)

Engine Compartment, near EBCM

Engine Controls Component Views in Engine Controls

VCM Connector End Views (5.0l/5.7l) VCM Connector End Views (7.4l) in Engine Controls

Water-in-Fuel Sensor (Diesel)

Top near of Engine

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

C100

Part of the engine harness to IP harness, in the left rear side of the engine compartment, at the bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C103

Part of the engine harness to fuel pump motor, in the left rear side of the engine compartment, under the brake master cylinder

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C104

Part of the IP harness to front to rear harness, in the left rear side of the engine compartment, under the brake master cylinder

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C114 (Diesel)

Part of the engine harness to engine sensors, center rear of the engine

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C115

In-line connector, from the Engine harness to the Alternator Jumper harness

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C130

Engine harness, Inline to the Tail and Stop Lamp Extension harness

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

Behind the right side of the IP, near the heater motor, in foam wrap

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C215

Inside the lower right side A pillar

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C223

At the convenience center

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C232

Part of the IP harness to SIR harness, behind the right side of the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103 (Gas)

On the right front side of the engine, near the thermostat housing

Power and Grounding Component Views in Wiring Systems

--

G104 (5.0L/5.7L)

Backside of the right cylinder head

Power and Grounding Component Views in Wiring Systems

--

G104 (6.5L)

Top rear of the right cylinder head

Power and Grounding Component Views in Wiring Systems

--

G104 (7.4L)

Backside of the engine block, below the right cylinder head

Power and Grounding Component Views in Wiring Systems

--

G105 (Gas)

On the right front side of the engine block

Power and Grounding Component Views in Wiring Systems

--

G105 (Diesel)

Right Rear of the cylinder head, cylinder #7 intake bolt

Power and Grounding Component Views in Wiring Systems

--

G200

Behind the left side of the IP, below the fuse block, on the tie bar

Power and Grounding Component Views in Wiring Systems

--

G404

Inside the left side frame rail, near the rear crossmember

Power and Grounding Component Views in Wiring Systems

--

P100

In the left rear side of the engine compartment, at the bulkhead, above C100

Harness Routing Views in Wiring Systems

--

P101

In the right rear side of the engine compartment, at the bulkhead

Harness Routing Views in Wiring Systems

--

S100 (5.0L, 5.7L)

Engine harness, approximately 17 cm (7 in) from the EBCM breakout, toward the taillamp harness

--

--

S100 (6.5L - A/T)

Engine harness, approximately 31 cm (12 in) from the taillamp harness breakout

--

--

S100 (6.5L - M/T)

Engine harness, approximately 37 cm (14.5 in) from the EBCM breakout, toward the taillamp harness

--

--

S100 (7.4L)

Engine harness, approximately 23 cm (9 in) from the EBCM breakout, toward the taillamp harness

--

--

S103 (5.0L, 5.7L)

Engine harness, approximately 8 cm (3 in) from the EGR valve breakout, toward the taillamp harness breakout

--

--

S103 (6.5L)

Engine harness, approximately 12 cm (4.7 in) from the starter solenoid breakout, towards the Underhood Lamp harness breakout

--

--

S103 (7.4L - A/T)

Engine harness, approximately 8 cm (3 in) from the EGR Valve harness breakout, towards the Ignition Coil harness breakout

--

--

S103 (7.4L - M/T)

Engine Harness, approximately 4 cm (1.5 in) from the Fuel Injector harness breakout, towards the Taillamp harness breakout

--

--

S106 (5.0L, 5.7L)

Engine harness, approximately 17 cm (6.5 in) from the EGR valve breakout, toward the fuel injector breakout

--

--

S106 (7.4L)

Engine harness, approximately 7 cm (2.5 in) from the EGR valve breakout, toward the fuel injector breakout

--

--

S107 (5.0L, 5.7L)

Engine harness, approximately 20 cm (8 in) from the EGR valve breakout, toward the taillamp harness breakout

--

--

S107 (6.5L, HD)

Engine harness, approximately 40 cm (15 in) from the EBCM breakout, toward the transmission harness breakout

--

--

S107 (7.4L)

Engine harness, approximately 18 cm (7 in) from the EBCM breakout, toward the EGR harness breakout

--

--

S108 (Gas)

Engine harness, approximately 12 cm (4.5 in) from the ignition coil breakout, toward the starter solenoid

--

--

S108 (Diesel)

Engine harness, approximately 6 cm (2.5 in) from the transmission harness breakout, towards the PCM

--

--

S115 (6.5L)

Engine jumper harness, approximately 5 cm (2 in) from the oil pressure sensor breakout

--

--

S146 (7.4L)

Engine harness, approximately 22 cm (8.5 in) into the Underhood Fuse Relay Center harness

--

--

S147 (Gas)

Engine harness, approximately 5 cm (2 in) from the EGR valve breakout, toward the taillamp harness breakout

--

--

S147 (Diesel)

Engine harness, approximately 4 cm (1.5 in) from the starter motor solenoid breakout

--

--

S162 (5.0L, 5.7L)

Engine harness, approximately 17 cm (6.5 in) from the starter solenoid breakout, toward the LH oxygen sensor breakout

--

--

S162 (7.4L)

Engine harness, approximately 15 cm (6 in) from the RH bank oxygen sensor breakout, toward the starter solenoid breakout

--

--

S211 (Diesel)

IP harness, approximately 16 cm (6 in) into the instrument cluster breakout

--

--

S211 (Gas)

IP harness approximately 4 cm (1.5 in) from the engine harness breakout

--

--

S213

IP harness, approximately 4 cm (1.5 in) from the steering column harness breakout, towards the DLC

--

--

S215

IP harness, approximately 8 cm (3 in) from the instrument cluster breakout, toward the radio connectors breakout

--

--

S217

IP harness, approximately 16 cm (6 in) from the instrument cluster harness breakout, toward the radio connectors breakout

--

--

S232 (5.0L - HD, 5.7L - HD)

Engine harness, approximately 10 cm (4 in) from the EGR valve breakout

--

--

S232 (5.0L - LD, 5.7L - LD)

Engine harness, approximately 27 cm (10.5 in) from the EGR valve breakout

--

--

S232 (7.4L)

Engine harness, approximately 4 cm (1.5 in) into the EGR valve breakout

--

--

S298

IP harness, approximately 24 cm (9.5 in) from the instrument cluster breakout, toward the radio breakout

--

--

S315

Taillamp extension harness, approximately 40 cm (15 in) from the fuel pump balance module breakout, toward the engine harness

--

--

S317

Taillamp extension harness, approximately 10 cm (4 in) from the fuel pump and sender breakout, toward the engine harness

--

--

S318

Taillamp extension harness, approximately 10 cm (4 in) from the fuel pump balance module breakout, toward the engine harness

--

--

S319 (Gas)

Taillamp extension harness, approximately 7 cm (2.5 in) from the fuel pump and sender breakout, toward the balance fuel pump balance module breakout

--

--

S324

Taillamp extension harness, approximately 10 cm (4 in) from the G404 breakout, toward the engine harness

--

--

S430

Taillamp extension harness, approximately 6 cm (2.5 in) from the fuel pump harness breakout, toward C409

--

--