GM Service Manual Online
For 1990-2009 cars only

Automatic Transmission Components Gas Engines

Name

Location

Locator View

Connector End View

Group No.

A/C Compressor Clutch

Front of A/C compressor

Fig 19,24

202-60

--

A/C Compressor Enable Relay

Underhood fuse-relay center, LH front of engine compartment

Fig. 45

202-98

--

A/C Compressor High Pressure Cutoff Switch

On rear portion of A/C compressor

Fig. 21,26

202-58

--

A/C Compressor Low Pressure Cutout Switch

In low pressure refrigerant line

Fig.48

202-56

--

Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Internal to transmission

Fig.33

202-74

--

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

LH side of transmission

Fig. 34

202-61

--

Automatic Transmission

Under center of vehicle, attached to rear of engine

Fig. 33,34

--

--

Camshaft Position (CMP) Sensor

Part of distributor, rear top of engine

Fig.25

202-66

--

Crankshaft Position (CKP) Sensor

Lower front engine, near crankshaft

Fig. 20,24

202-65

--

Cruise Control Module

Front of engine compartment, near LH fender

Fig.44

202-87

--

Data Link Connector (DLC)

Under LH side of IP

Fig.71

202-92

--

Electronic Brake Control Module (EBCM)

LH frame rail near center of vehicle

Fig.37,38

202-57-73

3.140

Engine Coolant Temperature (ECT) Sensor

Top front of engine

Fig 19,21,24

202-61

--

Evaporative Emission (EVAP) Canister Purge Valve

RH side of engine

Fig.17,26

202-53

--

Evaporative Emission (EVAP) Canister Vacuum Switch

RH side of engine

Fig.19,26

202-51

3.682

Exhaust Gas Recirculation (EGR) Valve (L30/L31)

Top front of engine

Fig.19

202-73

3.682

Exhaust Gas Recirculation (EGR) Valve (L29)

RH side of engine

Fig.26

202-73

--

Fuel Injectors #1 through #8 (L30/L31)

Engine harness, in line to engine fuel injectors, top of intake manifold

Fig.19

202-93

3.682

Fuel Injectors #1 through #8 (L29)

Engine harness, in line to engine fuel injectors, top of intake manifold

Fig.24

202-10

--

Fuel Pump Switch and Engine Oil Pressure Gauge Sensor

Top rear of engine

Fig. 17,25

202-65

--

Fuel Pump (FP) and Sender 35 GAL

In fuel tank, under rear of vehicle

Fig.42

202-71

--

Fuel Pump (FP) and Sender 55 GAL

In fuel tank, under rear of vehicle

Fig.43

202-70

--

Fuel Pump Relay

In underhood fuse- relay center, LH front of engine compartment

Fig.45

202-98

--

Heated Oxygen Sensor, Bank 1 Sensor 1

In exhaust pipe, in front of catalytic converter

Fig.36

202-71-72

--

Heated Oxygen Sensor, Bank 1 Sensor 2

In exhaust pipe, in front of catalytic converter

Fig.36

202-71-72

--

Heated Oxygen Sensor, Bank 1 Sensor 3 (L30/L31)

In exhaust pipe, in back of catalytic converter

Fig.35

202-71-72

--

Heated Oxygen Sensor, Bank 2 Sensor 1

In exhaust pipe in front of catalytic converter

Fig.36

202-71-72

--

Heated Oxygen Sensor, Bank 2 Sensor 2

In exhaust pipe, in back of catalyic converter

Fig.36

202-71-72

--

Heater and A/C Controller

Center Of IP

Fig.55

202-67-69

--

IP Fuse Block

At

LH lower kick panel

Fig.66

202-96

--

Idle Air Control Valve

Top LH side of engine

Fig. 21,24

202-72

--

Ignition Control Module

Top RH side of engine

Fig.19,25

202-72

--

Ignition Coil

Top RH of engine.

Fig.19,25

202-72

--

Instrument Cluster

LH side of IP

Fig.51

202-95

----

Intake Air Temperature (IAT) Sensor

Part of air intake duct, front of engine compartment

Fig. 22,27

202-61

--

Knock Sensor (L30/31)

Top rear of engine

Fig.17

202-48

--

Knock Sensor LH

LH side of engine

Fig.26

202-48

--

Knock Sensor RH

RH side of engine

Fig.24

202-48

--

Manifold Absolute Pressure (MAP) Sensor

Top RH side of engine

Fig.18,24

202-67

--

Mass Air Flow (MAF) Sensor

Part of air intake duct, front top of engine

Fig.23

202-64

--

Power Steering Control Module

Below center of IP

Fig.64

202-93

--

Pressure Control Solenoid (PC SOL) Valve

Internal to transmission

Fig. 33

202-63

--

Radio

Center of I/P

Fig.56

202-84-85

--

Secondary Air Injection Reaction (AIR) Pump Clutch (L29)

RH lower front of engine

Fig.28

202-54

--

Secondary Air Injection Reaction (AIR) Pump Relay (L29)

Underhood fuse-relay center, LH front of engine compartment

Fig.45

202-98

--

Shift Solenoid 1,2,3

Internal to transmission

Fig.33

202-62

--

TCC/Stoplamp Switch

Below center of IP, near brake pedal lever

Fig.73

202-75

--

Throttle Position (TP) Sensor (L30/L31)

LH top of engine

Fig.21

202-65

--

Torque Convertor Clutch Solenoid (TCC SOL) Valve (L30/L31)

Internal to transmission

Fig.33

202-64

--

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

Internal to transmission

Fig.33

202-63

--

Transmission Fluid Temperature (TFT) Sensor

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

Fig.33

--

--

Underhood Fuse -Relay Center

Engine compartment, left fender

Fig.45

202-98

--

Vehicle Control Module (VCM)

Engine compartment, LH fender

Fig.44,45

--

--

Vehicle Speed Sensor (VSS)

LH side of transmission

Fig.33,34

202-61

--

C100

LH rear of engine compartment at bulkhead

Fig.45,66

202-0

--

C103 (M30)

LH on transmission

Fig.33

202-4

--

C103 (MT1)

LH on transmission

Fig.34

202-5

--

C105

Engine harness, RH frame rail near starter

Fig.37

202-6

--

C110

Engine harness, in line to engine sensors

Fig.19,25

202-10

--

C112 (L29)

Engine harness, in to engine fuel injectors , top of intake manifold

Fig.25

202-10

--

C213

IP harness behind LH side of IP near center of vehicle

Fig.80

202-28

--

C301

Engine harness, in line to fuel pump harness on LH frame rail near EBCM

Fig.39

202-37

--

G101

Engine harness, near thermostat housing

Fig.24,30

--

--

G105 (L29)

RH lower front of engine

Fig.12

--

--

G201

IP harness behind LH kick panel near IP fuse block

Fig.66

--

--

G103

LH front of Engine harness A/C compressor

Fig. 25

--

--

P100

LH rear of engine compartment at bulkhead

Fig45

--

--

P101

Under RH side of IP

Fig.80

--

--

S101 (L30/L31)

Engine harness, approx 4cm from ignition coil breakout toward tranmission

--

--

--

S101

Engine harness, approx 14cm from fuel injector breakout toward transmission

--

--

--

S102 (L30/L31)

Engine harness, approx 37 cm from ECT sensor breakout toward C100

--

--

--

S102

Engine harness, approx 5cm from MAF sensor breakout toward C100 breakout

--

--

--

S103 (L30/L31)

Engine harness, approx 10cm from EGR sensor breakout toward C100

--

--

--

S103

Engine harness, approx 4cm from ECT sensor breakout toward knock sensor breakout

--

--

--

S112

IP harness, approx 40cm from C100 toward P102

--

--

--

S113

IP harness, approx 27 cm from C100 toward P102

--

--

--

S120 (L30/L31)

Engine harness, approx 4cm from C100 breakout toward ECT sensor breakout

--

--

--

S120

Engine harness, approx 19cm from C100 breakout toward EGR sensor breakout

--

--

--

S122 (L30/L31)

Engine harness 24cm from G101 breakout towards C100

--

--

--

S122

Engine harness, approx 8cm from C100 breakout toward VCM

--

--

--

S130 (L30/L31)

Engine harness, approx 4cm from heated RH oxygen sensors breakout toward P101

--

-

--

S130

Engine harness, approx 5cm from CKP sensor breakout toward MAF sensor breakout

--

--

--

S131 (L30/L31)

Engine harness, approx 24cm from C100

--

--

--

S131

Engine harness, approx 6cm from MAP sensor breakout toward ECT sensor breakout

--

--

--

S132 (L30/L31)

Engine harness, approx 8cm into fuel injector harness breakout

--

--

--

S132

Engine harness, appox 4cm from EGR valve breakout toward knock sensor breakout

--

--

--

S133 (L30/L31)

Engine harness, approx 15cm into fuel injector harness breakout

--

--

--

S136 (L30/L31)

Engine harness, approx 7cm RH HO2 sensor breakout toward fuel injector breakout

--

--

--

S136

Engine harness, approx 7cm from engine coolant temperature sensor toward EGR valve breakout

--

--

--

S137(L30/L31)

Engine harness approx 17cm from ECT sensor breakout toward C100

--

--

--

S137

Engine harness, approx 14cm from MAF sensor breakout toward C100 breakout

--

--

--

S138 (L30/L31)

Engine harness, approx 4cm from fuel injector harness breakout toward heated oxygen sensors breakout

--

--

--

S138

Engine harness, approx 8cm from fuel injector harness breakout toward EGR

--

--

--

S139 (L30/L31)

Engine harness, approx 4cm from ECT sensor breakout toward C100

--

--

--

S139

Engine harness, approx 21cm from MAF sensor breakout toward C100 breakout

--

--

--

S140 (L29)

Fuel injector harness, approx 10cm from C112 towards fuel injector connector

--

--

--

S147 (L29)

Engine harness, approx 5cm from MAP sensor breakout toward ignition coil breakout

--

--

--

S152 (L30/L31)

Engine harness 4cm from fuel injector breakout towards G103 breakout

--

--

--

S152

Engine harness 5cm from oxygen sensor breakout towards P101

--

--

--

S153 (L30/L31)

Engine harness 17cm from fuel injector breakout towards transmission

--

--

--

S153

Engine harness, approx 15cm form C100 breakout EGR sensor breakout

--

--

--

S154 (L30/L31)

Engine harness 20cm from fuel injector breakout towards G103 breakout

--.

--

--

S154

Engine harness 27cm from MAF sensor breakout towards underhood fuse-relay center

--

--

--

S157 (L30/31)

Engine harness 30cm from MAF sensor breakout towards underhood fuse-relay center

--

--

--

S201

IP harness, approx 6cm from park brake warning switch breakout toward data link connector breakout

--

--

--

S202

IP harness, approx 4cm from radio breakout toward RH of body

--

--

--

S207

IP harness, approx 4cm into VSSB breakout

--

--

--

S210

IP harness, approx 4 cm into TCC/Stoplamp switch breakout

--

--

--

S215

IP harness, approx 11cm from radio breakout toward power antenna assembly breakout

--

--

--

S216

IP harness, approx 8cm from C200 breakout toward instrument cluster breakout

--

--

--

S218

IP harness, approx 33cm from C100 toward IP fuse block

--

--

--

S239

IP harness, approx 17cm into VSSB breakout

--

--

--

S301 (L29)

O2S jumper harness, approx 47cm from C105 breakout toward O2S pigtail connector

--

--

--

S301 (L30)

O2S jumper harness, approx 15cm from C105 breakout toward O2S pigtail connector

--

--

--

S301 (L31)

O2S jumper harness, approx 28cm from C105 breakout toward O2S pigtail connector

--

--

--

S304 (L29)

O2S jumper harness, approx 66cm from C105 breakout toward O2S

--

--

--

S304 (L30)

O2S jumper harness, approx 22cm from C105 breakout toward O2S pigtail connector

--

--

--

S304 (L31)

O2S jumper harness, approx 35cm from C105 breakout toward O2S pigtail connector

--

--

--

Automatic Transmission Components Diesel Engines

Name

Location

Locator View

Connector End View

Group No.

A/C Compressor Clutch

Front of A/C compressor

Fig.30

202-60

--

A/C Compressor Enable Relay

Underhood fuse-relay center, LH front of engine compartment

Fig. 45

202-98

--

A/C Compressor High Pressure Cutoff Switch

On rear portion of A/C compressor

Fig. 26,31

202-58

--

A/C Compressor Low Pressure Cutout Switch

In low pressure refrigerant line

Fig.48

202-56

--

Accelerator Pedal Position Module

Below IP, attached to accelerator pedal

Fig.65

202-88

--

Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch

Internal to transmission

Fig.33

202-74

--

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

LH side of transmission

Fig. 34

202-61

--

Automatic Transmission

Under center of vehicle, attached to rear of engine

Fig. 33,34

--

--

Battery Junction Block

Front RH side of engine compartment, next to radiator

Fig.7

--

--

Boost Pressure Sensor

Top of engine

Fig.30

202-66

--

Crankshaft Position (CKP) Sensor

Lower LH front engine, near crankshaft

Fig. 30

202-67

--

Cruise Control Switch

Part of multi-function lever

Fig.60

202-14

--

Data Link Connector (DLC)

Under LH side of IP

Fig.71

202-92

--

Electronic Brake Control Module (EBCM)

LH frame rail near center of vehicle

Fig.37,38

202-73-88

--

Engine Coolant Temperature (ECT) Sensor

Top front of engine

Fig 30

202-56

--

Engine Shut Off Solenoid

Top RH side of engine

Fig.30

202-53

--

Fuel Heater

LH frame rail near center of vehicle

Fig.40,41

202-53

--

Fuel Lift Pump

LH frame rail near center of vehicle

Fig.39,40

202-55

--

Fuel Pump Switch and Engine Oil Pressure Gauge Sensor

Top rear of engine

Fig. 17,25

202-65

--

Fuel Pump Relay

In underhood fuse- relay center, LH front of engine compartment

Fig.45

202-98

--

Fuel Solenoid Driver

Top RH side of engine

Fig.30

202-69

--

Fuel Solenoid (Part of Fuel Sol. Driver)

Top RH side of engine

Fig.30

202-69

--

Glow Plug Relay

Top RH side of engine

Fig.29,32

202-68

--

Glow Plugs #1 through #8

Both sides of engine

Fig.30

202-48

--

HVAC Control Module

Center Of IP

Fig.55

202-69-83

--

IP Fuse Block

At LH lower kick panel

Fig.66

202-96

--

Ignition Timing Stepper (ITS) Motor

Top front of engine

Fig.30

202-69

--

Instrument Cluster

LH side of IP

Fig.51

202-95

--

Intake Air Temperature (IAT) Sensor

Top of engine, RH side

Fig. 29

202-61

--

Optical Fuel Temperature Sensor

Top of engine

Fig.30

202-76

--

Pressure Control Solenoid (PC SOL) Valve

Internal to transmission

Fig.33

202-63

--

Powertrain Control Module (PCM)

Behind center of IP

Fig.80

--

--

Radio

Center of I/P

Fig.56

202-85-89

--

Shift Solenoid 1,2,3

Internal to transmission

Fig.33

202-62-63

--

TCC/Stoplamp Switch

Below center of IP, near brake pedal lever

Fig.73

202-75

--

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

Internal to transmission

Fig.33

202-63

--

Transmission Fluid Temperature (TFT) Sensor

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

Fig.33

--

--

Underhood Fuse -Relay Center

Engine compartment, left fender

Fig.45

202-98

--

Vehicle Speed Sensor (VSS)

LH side of transmission

Fig.33,34

202-61

--

Vehicle Speed Sensor (VSS) Buffer

Below LH side of IP, near steering column

Fig.64

202-85

--

Wastegate Solenoid

RH top of engine

Fig.31

202-52

--

Water In Fuel Sensor (Indicator Lamp)

LH side of instrument cluster, part of instrument cluster

Fig.50

202-66

--

Water In Fuel Sensor (Indicator Sensor)

LH frame rail near center of vehicle

Fig.41

202-60

--

C100

LH rear of engine compartment at bulkhead

Fig.45,66

202-0

--

C101

Engine harness, LH top of engine

Fig.31

202-2

--

C103 (M30)

LH on transmission

Fig.33

202-4

--

C103 (MT1)

LH on transmission

Fig.34

202-5

--

C106

Engine harness, LH top of engine

Fig.31

202-7

--

C107

Engine harness, LH top of engine

Fig.31

202-8

--

C108

Engine harness, RH side, near glow plug relay

Fig.29

202-9

--

C117

Top of engine, next to fuel solenoid driver

Fig.31

202-12

--

C118

Top of engine, next to optical fuel temperature sensor

Fig.31

202-13

--

C200

Steering column harness at base of column

Fig.61

202-14

--

C213

IP harness behind LH side of IP near center of vehicle

Fig.80

202-28

--

C220

Below IP near P101

Fig.80

202-35

--

C301

Engine harness, in line to fuel pump harness on LH frame rail near EBCM

Fig.39

202-37

--

G101

Engine harness, near thermostat housing

Fig.24,30

--

--

G103

Engine harness, at generator bracket

Fig.30

--

--

G201

IP harness behind LH kick panel near IP fuse block

Fig.66

--

--

P100

LH rear of engine compartment at bulkhead

Fig.45

--

--

P101

Under RH side of IP

Fig.80

--

--

S101

Engine harness, approx 22cm from optical fuel temperature sensor breakout toward C100 breakout

--

--

--

S102

Engine harness, approx 4cm from main harness breakout that leads to blower motor toward C100

--

--

--

S105

Engine jumper harness, approx 4cm into optical fuel temperature sensor breakout

--

--

--

S106

Engine jumper harness, approx 4cm into crankshaft position sensor breakout

--

--

--

S107

Engine jumper harness, approx 4cm into engine shut off solenoid breakout

--

--

--

S108

Engine jumper harness, approx 2cm from optical fuel temperature sensor breakout toward engine coolant temperature (ECT) sensor breakout

--

--

--

S112

IP harness, approx 40cm from C100 toward P102

--

--

--

S114

IP harness, approx 14cm from C100 toward P102

--

--

--

S115

Engine jumper harness, approx 6cm from optical fuel temperature sensor breakout toward C107

--

--

--

S116

Engine harness, approx 27cm from main harness breakout that leads to underhood fuse-relay center and C100 breakouts, opposite optical fuel temperature sensor breakout

--

--

--

S117

Engine harness, approx 11cm into main harness breakout that leads to blower motor resistor/relay and starter solenoid breakouts

--

--

--

S120

Engine harness, approx 4cm into main harness breakout that leads to blower motor resistor and starter solenoid breakouts

--

--

--

S121

Engine harness, approx 31cm from P101 toward stater solenoid breakout

--

--

--

S123

Engine jumper harness, approx 4cm into fuel solenoid driver breakout

--

--

--

S124

Engine harness, approx 15cm from C107 breakout toward C100 breakout

--

--

--

S130

Engine harness, approx 4cm from C101 toward electronic brake control module (EBCM)

--

--

--

S138

Engine harness, approx 10cm from A/T input shaft speed sensor breakout toward C100 breakout

--

--

--

S157

Engine harness, approx 24cm from P101

--

--

--

S201

IP harness, approx 6cm from park brake warning switch breakout toward data link connector breakout

--

--

--

S202

IP harness, approx 4cm from radio breakout toward RH of body

--

--

--

S210

IP harness, approx 4 cm into TCC/Stoplamp switch breakout

--

--

--

S215

IP harness, approx 11cm from radio breakout toward power antenna assembly breakout

--

--

--

S216

IP harness, approx 8cm from C200 breakout toward instrument cluster breakout

--

--

--

S218

IP harness, approx 33cm from C100 toward IP fuse block

--

--

--

S238

IP harness, approx 4cm from instrument cluster breakout toward IP relay center

--

--

--

S239

IP harness, approx 17cm into VSSB breakout

--

--

--