GM Service Manual Online
For 1990-2009 cars only

Automatic Transmission Components Gas

Name

Location

Locator View

Connector End View

Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

Automatic Transmission Input Shaft Speed (A/T ISS) Sensor

LH side of transmission

Transmission Component Location

Automatic Transmission Inline Harness Connector End View

A/T Shift Lock Solenoid

Inside the steering column

Shift Lock Control Component Views

Shift Lock Control Connector End Views

IP Fuse Block

At LH lower kick panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Park/Neutral Position Switch

Left rear of transmission case

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Pressure Control Solenoid (PC SOL) Valve

Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

Shift Solenoid 1-2, 2-3, for the 4L80-E

Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

TCC/Stoplamp Switch

Below center of IP, near brake pedal lever

Lighting Systems Component Views in Body and Accessories

Lighting Systems Connector End Views in Body and Accessories

Torque Convertor Clutch Pulse Width Modulation Solenoid (TCC PWM SOL) Valve

Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

Transmission Fluid Temperature (TFT) Sensor

Part of Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch. Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

Underhood Fuse Relay Center

Engine compartment, left fender

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM)

Engine compartment, LH fender

    •  Engine Controls Component Views in Engine Controls 4.3L
    •  Engine Controls Component Views in Engine Controls 5.0,5.7L
    •  Engine Controls Component Views in Engine Controls 7.4L
    •  VCM Connector End Views in Engine Controls 4.3L
    •  VCM Connector End Views in Engine Controls 5.0,5.7L
    •  VCM Connector End Views in Engine Controls 7.4L

Vehicle Speed Sensor (VSS)

LH side of transmission

    •  Engine Controls Component Views in Engine Controls 4.3L
    •  Engine Controls Component Views in Engine Controls 5.0,5.7L
    •  Engine Controls Component Views in Engine Controls 7.4L
    •  Engine Controls Connector End Views in Engine Controls 4.3L
    •  Engine Controls Connector End Views in Engine Controls 5.0,5.7L
    •  Engine Controls Connector End Views in Engine Controls 7.4L

C100

LH rear of engine compartment at bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C103

LH on transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View

C200

Steering column harness, at the base of the column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G201

IP harness, behind left kick panel, near the IP fuse block

Power and Grounding Component Views in Wiring Systems

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S120 (4.3L, 5.0L, 5.7L)

In the engine harness, approximately 14 cm (6 in) from the C100 breakout, into the VCM breakout

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S120 (6.5L)

In the engine harness, approximately 4 cm (2 in) from the A/C compressor breakout, toward the blower motor resistor breakout

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S120 (7.4L)

In the engine harness, approximately 14 cm (6 in) from the C100 breakout, into the VCM breakout

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S132 (4.3L)

in the engine harness, approximately 4 cm (1.6 in) from the fuel injector breakout, toward the heated oxygen sensor (bank2 sensor1) breakout

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S132 (5.0L, 5.7L)

In the engine harness, approximately 8 cm (3.1 in) into the fuel injector breakout

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S132 (7.4L)

In the engine harness, approximately 4 cm (1.6 in) from the EGR valve breakout, toward the knock sensor breakout

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S133 (4.3L)

In the engine harness, approximately 4 cm (1.5 in) from the fuel injector harness breakout, toward the knock sensor breakout

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S133 (5.0L, 5.7L)

in the engine harness, approximately 15 cm (5.9 in) into the fuel injector breakout

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S136 (4.3L)

In the engine harness, approximately 111 cm (43.7 in) from the underhood fuse block, toward the A/C compressor clutch breakout

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S136 (5.0L, 5.7L)

in the engine harness, approximately 8 cm (3.1 in) from the heated oxygen sensor (bank2 sensor1) breakout, toward the fuel injector breakout

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S136 (7.4L)

in the engine harness, approximately 7 cm (2.8 in) fromthe ECT sensor breakout, toward the EGR valve breakout

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S154 (4.3L, 5.0L, 5.7L)

in the engine harness, approximately 98 cm (38.6 in) from the underhood fuse block, toward the A/C compressor breakout

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S154 (7.4L)

in the engine harness, approximately 98 cm (38.6 in) from the underhood fuse block, toward the A/C compressor breakout

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S201

In the IP harness, approximately 4 cm (2 in) from the park brake warning switch breakout, toward the data link connector (DLC) breakout

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S210

In the IP harness, approximately 4 cm (1.6 in) into the TCC/Stoplamp switch breakout

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S217

In the IP harness, approximately 30 cm (12 in) from C100, toward the IP fuse block

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S231

in the IP harness, approximately 18 cm (7 in) from C100, toward the park brake warning switch breakout

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Automatic Transmission Components Diesel

Name

Location

Locator View

Connector End View

Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

Automatic Transmission Input Shaft Speed (A/T ISS) Sensor

LH side of transmission

Transmission Component Location

Automatic Transmission Inline Harness Connector End View

A/T Shift Lock Solenoid

Inside steering column

Shift Lock Control Component Views

Shift Lock Control Connector End Views

Electronic Brake Control Module (EBCM)

LH frame rail near center of vehicle

Antilock Brake System Component Views in Brakes

Antilock Brake System Connector End Views in Brakes

Instrument Cluster

LH side of IP

Instrument Panel, Gages, and Console Component Views in Body and Accessories

Instrument Panel, Gages, and Console Connector End Views in Body and Accessories

IP Fuse Block

At LH lower kick panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Park/Neutral Position Switch

Left rear of transmission case

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Powertrain Control Module (PCM)

Behind center of IP

Engine Controls Component Views in Engine Controls 6.5L

Powertrain Control Module Connector End Views in Engine Controls 6.5L

Pressure Control Solenoid (PC SOL) Valve

Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

Radio

Center of I/P

Entertainment Component Views in Body and Accessories

Entertainment Connector End Views in Body and Accessories

Shift Solenoid 1-2, 2-3, for the 4L80-E

Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

TCC/Stoplamp Switch

Below center of IP, near brake pedal lever

Lighting Systems Component Views in Body and Accessories

Lighting Systems Connector End Views in Body and Accessories

Torque Convertor Clutch Pulse Width Modulation Solenoid (TCC PWM SOL) Valve

Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

Transmission Fluid Temperature (TFT) Sensor

Part of Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch. Internal to transmission

Transmission Component Location

Automatic Transmission Internal Connector End Views

Underhood Fuse--Relay Center

Engine compartment, left fender

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Speed Sensor (VSS)

LH side of transmission

Engine Controls Component Views in Engine Controls 6.5L

Engine Controls Connector End Views in Engine Controls 6.5L

Vehicle Speed Sensor (VSS) Buffer

Below LH side of IP, near steering column

Instrument Panel, Gages, and Console Component Views in Body and Accessories

Instrument Panel, Gages, and Console Connector End Views in Body and Accessories

C100

LH rear of engine compartment at bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C103

LH on transmission

Harness Routing Views in Wiring Systems

Automatic Transmission Inline Harness Connector End View

C200

Steering column harness, at base of steering column

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C213

LH IP in the IP harness, approximately 24 cm (9 in) from C100, toward the IP fuse block

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103

Engine harness, at generator bracket

Power and Grounding Component Views in Wiring Systems

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G201

IP harness, behind left kick panel, near IP fuse block

Power and Grounding Component Views in Wiring Systems

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P101

Under RH side of IP

Harness Routing Views in Wiring Systems

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S102

In the engine harness, approximately 4 cm (1.6 in) from the A/C compressor breakout, toward C101

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S117

In the engine harness, approximately 11 cm (4 in) from the main harness breakout that leads to the underhood fuse-relay centerm toward the blower motor resistor breakout

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S120

in the engine harness, approximately 4 cm (1.6 in) from the A/C compressor breakout, toward the blower motor resistor breakout

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S124

In the engine harness, approximately 17 cm (6.7 in) from the A/C compressor breakout, toward the G101 breakout

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S201

In the IP harness, approximately 4 cm (2 in) from the park brake warning switch breakout, toward the data link connector (DLC) breakout

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S216

in the IP harness, approximately 8 cm (3.1 in) from the C200 breakout, toward the instrument cluster breakout

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S217

In the IP harness, approximately 30 cm (12 in) from C100, toward the IP fuse block

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S238

In the IP harness, approximately 23 cm (9 in) into the VSS buffer module breakout

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S253

In the IP harness, approximately 21 cm (8.3 in) from C100, toward the park brake warning switch breakout

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S254

In the IP harness, approximately 10 cm (4 in) from the park brake warning switch breakoutm toward the datalink connector (DLC) breakout

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