GM Service Manual Online
For 1990-2009 cars only

Hydraulic Brakes Components P42

Name

Location

Locator View

Connector End View

Brake Pressure Differential Switch

Bolted to the brake pressure modulator valve below the radiator, on the lower crossmember

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Daytime Running Lamps (DRL) Module

On the IP harness, located by the body builder

--

Lighting Systems Connector End Views in Lighting Systems

Diode Network

On the IP harness, located by the body builder

--

Hydraulic Brake Connector End Views

Electronic Brake Control Module (EBCM)

Below the radiator, on the lower crossmember

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Ignition Switch

Lower RH side of the steering column, below the support bracket

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Instrument Cluster

Body builder installed

--

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

IP Fuse Block

Located by the body builder

Electrical Center Identification Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Power Brake Booster Fluid Flow Alarm

Provision installed by the body builder

--

Hydraulic Brake Connector End Views

Power Brake Booster Fluid Flow Indicator/Alarm Delay Module

Provision installed by the body builder

--

Hydraulic Brake Connector End Views

Power Brake Booster Fluid Flow Indicator/Alarm Switch

Provision for the body builder, behind the LH radiator support

Hydraulic Brake Component Views

Hydraulic Brake Connector End Views

Power Brake Booster Pump Pressure Switch

Provision for the body builder, behind the LH radiator support

Hydraulic Brake Component Views

--

C111

Engine harness to the ABS harness, at the front of the LH frame rail, above the steering gearbox

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

Engine harness to the IP harness, in the bulkhead near P100

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C206

Located by the body builder

--

--

C211

IP harness to the engine harness, on top of the steering column support

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G108

On top of the thermostat housing

Power and Grounding Component Views in Wiring Systems

--

G200

LH interior bulkhead, near the relay bracket

--

--

P102

On the bulkhead, located by the body builder

Harness Routing Views in Wiring Systems

--

R202

At the connector to the power brake booster fluid flow alarm, located by the body builder

--

--

S143 (EFI Diesel)

In the engine harness, approximately 16 cm (6 in) from the A/C compressor clutch breakout toward C200

--

--

S143 (MFI Diesel)

In the engine harness, approximately 17 cm (7 in) from P100

--

--

S165

In the ABS harness, approximately 10 cm (4 in) from the breakout for C110

--

--

S167

In the ABS harness, approximately 15 cm (6 in) from the RH wheel speed sensor breakout, toward C110

--

--

S204

In the IP harness, approximately 8 cm (3 in) from the IP fuse block breakout, toward C200

--

--

S205

In the IP harness, approximately 4 cm (2 in) before the fuse block breakout, toward C200

--

--

S207

In the IP harness, approximately 40 cm (16 in) from the fuse block breakout, toward the instrument cluster connector

--

--

S257

In the IP harness, approximately 24 cm (9 in) from the breakout for the IP fuse block, toward C200

--

--

Hydraulic Brakes Components P32 and Export

Name

Location

Locator View

Connector End View

Brake Pressure Differential Switch

Bolted to the brake pressure modulator valve below the radiator, on the lower crossmember

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Daytime Running Lamps (DRL) Module

On the IP harness, located by the body builder

--

Lighting Systems Connector End Views in Lighting Systems

Diode Network

On the IP harness, located by the body builder

--

Hydraulic Brake Connector End Views

Electronic Brake Control Module (EBCM)

Below the radiator, on the lower crossmember

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Ignition Switch

Lower RH side of the steering column, below the support bracket

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Instrument Cluster

Body builder installed

--

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges, and Console

IP Fuse Block

Located by the body builder

Electrical Center Identification Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Park Brake Actuator Position Switch

In the auto apply park brake component box, at the RH frame rail behind the transmission

Park Brake System Component Views in Park Brake

Park Brake System Connector End Views in Park Brake

Park Brake Alarm

On the IP harness, located by the body builder

--

Park Brake System Connector End Views in Park Brake

Park Brake Alarm Relay

On the IP harness, located by the body builder

--

Park Brake System Connector End Views in Park Brake

Park Brake Pull Button Relay

On the IP harness, located by the body builder

--

Park Brake System Connector End Views in Park Brake

Park Brake Pull Button Switch

Mounted to the IP

--

Park Brake System Connector End Views in Park Brake

Park Brake Switch (w/o Auto Apply)

On the IP harness, located by the body builder

--

--

Power Brake Booster Fluid Flow Alarm

Provision installed by the body builder

--

Hydraulic Brake Connector End Views

Power Brake Booster Fluid Flow Indicator/Alarm Delay Module

Provision installed by the body builder

--

Hydraulic Brake Connector End Views

Power Brake Booster Fluid Flow Indicator/Alarm Switch

Provision installed by the body builder

--

Hydraulic Brake Connector End Views

Power Brake Booster Pump Pressure Switch

Provision installed by the body builder

--

--

C104

On top of the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C111

Above the front of the LH frame rail, near the brake master cylinder

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

At the top front of the steering column support, near the park brake pull button switch

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C304

Above the auto apply park brake component box at the RH frame rail, behind the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

D201

In the IP harness, 14 cm (5 in) from the breakouts for the engine harness connector C200 and the horn relay

--

--

G108

On top of the thermostat housing

Power and Grounding Component Views in Wiring Systems

--

G200

Mounted to the top front of the steering column support plate

--

--

G350

In the auto apply park brake component box at the RH frame rail, behind the transmission

--

--

P100

Main wiring pass through at the bulkhead

Harness Routing Views in Wiring Systems

--

R203

At the connector to the power brake booster fluid flow alarm, located by the body builder

--

--

S128 (Diesel)

In the engine harness, 12 cm (5 in) from the glowplug controller breakout, toward the waste gate solenoid breakout

--

--

S143 (Diesel)

In the engine harness, 2 cm (1 in) from the breakout for C100 and C207, toward the cooling fan connector

--

--

S143 (Gas)

In the engine harness, 5 cm (2 in) from the breakout for the ABS connectors C110 and C111, toward the P100

--

--

S150 (Diesel)

In the engine harness, 14 cm (6 in) from P100

--

--

S150 (Gas)

In the engine harness, 4 cm (2 in) from the breakout for the battery junction block

--

--

S165

In the ABS harness, approximately 10 cm (4 in) from the breakout for C110

--

--

S167

In the ABS harness, approximately 19 cm (7 in) from the breakout for the RH wheel speed sensor, toward C110

--

--

S169 (Diesel)

In the engine harness, 8 cm (3 in) from the breakout for the engine coolant level switch, toward the starter relay breakout

--

--

S169 (Gas)

In the engine harness, 58 cm (23 in) from passthrough P100

--

--

S190 (Diesel)

In the engine harness, 15 cm (6 in) from the branch to the engine coolant level and the A/C compressor refrigerant pressure switch, toward the branch to the starter relay and the fuel pump relay

--

--

S202/S203 (Diode Splice)

In the IP harness, approximately 14 cm (5 in) from the breakout for connector C200 and the horn relay

--

--

S204

In the IP harness, 16 cm (6 in) from the breakout for connector C200, toward the IP fuse block

--

--

S205

In the IP harness breakout for the instrument cluster connector, 10 cm (4 in) from the main harness

--

--

S207

In the IP harness, 20 cm (8 in) from the breakout for connector C200, toward the IP fuse block

--

--

S211

In the IP harness, 6 cm (2 in) from the dimmer switch and the IP cluster breakout, toward the IP fuse block

--

--

S212

In the IP harness, 10 cm (4 in) from the breakouts for the IP cluster connector and the IP dimmer switch, toward the IP fuse block

--

--

S220 (Diesel)

In the IP side of the engine harness, 4 cm (1 in) from the breakout for the BTSI relay and the fan control relay

--

--

S228 (Diesel)

In the IP side of the engine harness, 28 cm (11 in) from P100

--

--

S230 (Gas)

In the IP side of the engine harness, 7 cm (2 in) from the breakout for the hazard lamp flasher and windshield wiper switch, toward P100

--

--

S364

In the auto apply park brake harness, 4 cm (1 in) from the breakouts for the park brake pump motor and the park brake pump relay connectors

--

--