GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Bussed Electrical Center (BBEC)

To the left of the dash, to the right of the IP Fuse Block

Power and Grounding Component Views

Power and Grounding Connector End Views

Body Control Module (BCM) Connector C1, (24 Cavities)

At the lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Body Control Module (BCM) Connector C2, (24 Cavities)

At the lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Data Link Connector (DLC)

To the lower left of the IP

Data Link Communications Component Views

Data Link Communications Connector End Views

Driver Information Display Module, Connector C1 (9 cavities) (w/ Trip Computer)

Front overhead console, in the passenger compartment

Driver Information System Components Views in Instrument Panel, Gauges and Console

Driver Information Systems Connector End Views in Instrument Panel, Gauges and Console

Driver Information Display Module, Connector C1 (6 cavities) (w/o Trip Computer)

Front overhead console, in the passenger compartment

Driver Information System Components Views in Instrument Panel, Gauges and Console

Driver Information Systems Connector End Views in Instrument Panel, Gauges and Console

Electronic Brake Control Module (EBCM)

Part of the Brake Pressure Modulator Valve (BPMV), at the left rear wheelwell

Antilock Brake System Component Views in ABS/Traction Control

Antilock Brake System Connector End Views in ABS/Traction Control

Electronic Brake Control Module (EBCM) Connector C1 (10 Cavities)

At the body harness connector on the left of the EBCM

Antilock Brake System Component Views in ABS/Traction Control

Antilock Brake System Connector End Views in ABS/Traction Control

Electronic Climate Control (ECC) Module (w/ Auto A/C)

At the IP harness center of the IP, below the radio

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

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

Instrument Cluster

In the IP, ahead of the steering column

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

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

Power and Grounding Component Views

Power and Grounding Connector End Views

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

To the right of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

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

Supplemental Inflatable Restraint Sensing And Diagnostic Module (SDM) (Pickup)

Between the left and the right seats, below the carpeting

SIR Component Views in SIR

SIR Connector End Views in SIR

Supplemental Inflatable Restraint Sensing And Diagnostic Module (SDM) (Utility and Envoy)

Between the left and the right seats, below the carpeting

SIR Component Views in SIR

SIR Connector End Views in SIR

Transfer Case Shift Control Module (NP1)

On the inside of the right side cowl panel (w/ electric shift 4WD)

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

Underhood Bussed Electrical Center (UBEC)

On the top of the left inner wheelwell

Power and Grounding Component Views

--

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

In the UBEC

Power and Grounding Component Views

Power and Grounding Connector End Views

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

Below the UBEC

Power and Grounding Component Views

Power and Grounding Connector End Views

Vehicle Control Module (VCM) (4.3L Engine)

To the right of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

--

Vehicle Control Module (VCM) (4.3L Engine) Connector C4 (24 Cavities)

To the right of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

VCM Connector End Views in Engine Controls - 4.3L

C101 (10 Cavities) (2.2L Engine)

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

Harness Routing Views

Inline Harness Connector End Views

C120 (5 Cavities)

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

Harness Routing Views

Inline Harness Connector End Views

C203 (116 Cavities)

At the body harness to IP harness, to the right of the IP

Harness Routing Views

Inline Harness Connector End Views

C209 (16 Cavities) (Utility)

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

Harness Routing Views

Inline Harness Connector End Views

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

--

G103 (4.3 L Engine)

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

Harness Routing Views

--

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

--

G105 (4.3 L Engine)

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

Harness Routing Views

--

G200

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

Harness Routing Views

--

G201

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

Harness Routing Views

--

P100

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

Harness Routing Views

--

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

--

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

--

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

--

Splice Pack SP201

At the body harness, to the left of the IP, below the IP fuse block

Harness Routing Views

--

Splice Pack SP202

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

Harness Routing Views

--