GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View (8A Cell 201 Figure #)

Connector End View

Group No.

7X Crankshaft Position (CKP) Sensor

Lower rear of engine

16

--

--

24X Crankshaft Position (CKP) Sensor

RH side of engine, at end of crankshaf, behind harmonic balencert

26

--

--

A/C Compressor Clutch Coil

Part of A/C compressor, mounted to RH front of engine

26

--

--

A/C Compressor Clutch Diode

Spliced into engine wiring harness, approximately 15 cm (6 in) from A/C compressor clutch coil connector

26

--

--

A/C Refrigerant Pressure Sensor

RH side of engine compartment, below accumulator

7

--

--

Automatic Transaxle

Lower LH side of engine compartment

2

--

--

Camshaft Position (CMP) Sensor

RH side of engine, below intake plenum

35

--

--

Cruise Control Module

LH side of engine compartment, near strut tower

30

34-1

--

Data Link Connector (DLC)

On bottom of I/P, right of steering column

103

50-1

--

Engine Coolant Fan Motor #1

Behind LH side of radiator

18

--

--

Engine Coolant Fan Motor #2

Behind RH side of radiator

18

--

--

Engine Coolant Temperature (ECT) Sensor

LH side top of engine

--

--

--

Engine Oil Level Sensor

Center of engine oil pan

6

--

--

Evaporative Emissions (EVAP) Canister Purge Valve

Top rear of engine, on intake manifold below ignition control module

8

--

--

Evaporative Emissions (EVAP) Canister Vacuum Switch

Top rear of engine, on intake manifold below ignition control module

8

--

--

Evaporative Emission (EVAP) Canister Vent Solenoid Valve

Behind left rear fascia splash shield in wheel well

121

--

--

Exhaust Gas Recirculation (EGR) Valve

Upper RH side of engine

8

202-57

--

Fuel Injectors

Top of engine at each cylinder intake port

--

--

--

Fuel Tank

Below rear of vehicle

99

--

--

Fuse Block

RH side of I/P, in RH front door opening

49

--

--

Generator

Top rear RH side of engine

3

202-58

--

Heated Oxygen Sensor (HO2S) #1

Rear of engine, in exhaust manifold

8

202-60

--

Heated Oxygen Sensor (HO2S) #2

In exhaust system, behind catalytic converter

24

202-60

--

Heater and A/C Control (Chevrolet)

Center of I/P

65

202-62

--

Heater and A/C Control (Oldsmobile C67)

Center of I/P

66

202-60

--

Heater and A/C Control (Oldsmobile CJ2)

Center of I/P

67

202-61

--

Idle Air Control Valve (IAC)

Top of engine, front of throttle assembly

8

202-63

--

Ignition Control (IC) Module

Top center rear of engine

8

202-63

--

Instrument Cluster (Chevrolet)

LH side of I/P

39

81-11

--

Instrument Cluster (Oldsmobile)

LH side of I/P

40

81-10

--

Intake Air Temperature (IAT) Sensor

LH front of engine compartment, on air intake duct

30

--

--

Knock Sensor (KS)

Front of engine, above starter

26

--

--

Manifold Absolute Pressure (MAP) Sensor

Top rear of engine, on intake plenum near ignition control module

--

--

--

Mass Air Flow (MAF) Sensor

LH front of engine compartment, in air cleaner duct

--

--

--

Powertrain Control Module (PCM)

RH side of engine compartment, forward of strut tower

25

--

--

Radio

Center of I/P

--

150-5, 6

--

Seat Belt / Ignition Key / Lamps (Warning) Alarm

Behind I/P, on RH side of heater - A/C module

68

202-67

--

Stoplamp Switch

Behind I/P, on brake pedal support

43

202-68

--

Theft Deterrent Module

Behind RH side of I/P, above I/P compartment

59

133-2

--

Throttle Position (TP) Sensor

Top of engine, on throttle assembly

8

--

--

Transaxle Range (TR) Switch

Left of engine, on transaxle

2

202-36

--

Underhood Electrical Center #1

RH side of engine compartment, forward of strut tower

20

11-0, 2

--

Underhood Electrical Center #2

LH side of engine compartment, forward of strut tower

34

11-4, 6

--

Vehicle Speed Sensor (VSS)

RH rear of engine, on transaxle

14

--

--

C100 (36 cavities)

Engine wiring harness to I/P wiring harness, in RH side of dash, behind strut tower

20

202-0

--

C102 (10 cavities)

Engine wiring harness to fuel injector wiring harness, on RH rear of engine compartment, near generator

3

202-4

--

C108 (5 cavities)

Engine wiring harness to fuel injector wiring harness, on RH rear of engine compartment, near generator

3

202-8

--

C111 (7 cavities)

Engine wiring harness to transaxle wiring harness, mounted in LH side of transaxle housing

--

202-9

--

C155 (4 cavities)

Engine wiring harness to wiper wiring harness, on RH rear of engine compartment, near C100

23

202-11

--

C156 (7 cavities)

Engine wiring harness to wiper wiring harness

--

202-12

--

C200 (102 cavities) (chevrolet)

I/P wiring harness to crossbody wiring harness, mounted behind RH side of I/P, near shroud

85

202-14

--

C200 (102 cavities) (Oldsmobile)

I/P wiring harness to crossbody wiring harness, mounted behind RH side of I/P, near shroud

85

202-14

--

C400 (8 cavities) (Chevrolet)

Crossbody wiring harness to rear body harness, below RH sill panel of rear compartment

123

202-47

--

C400 (8 cavities) (Oldsmobile)

Crossbody wiring harness to rear body harness, below RH sill panel of rear compartment

98

202-48

--

C405 (6 cavities) (Chevrolet)

Crossbody wiring harness to fuel tank wiring harness, below center rear of vehicle above fuel tank

99

202-49

--

C405 (6 cavities) (Oldsmobile)

Crossbody wiring harness to fuel tank wiring harness, below center rear of vehicle above fuel tank

99

202-49

--

G111

Lower LH front of engine, on transaxle stud

2

--

--

G113

Lower LH front of engine, on transaxle stud

2

--

--

G115

Lower LH front of engine, on transaxle

2

--

--

G117

Lower LH front of engine, on transaxle stud

2

--

--

G201

Behind I/P, on RH side of brake pedal bracket

48

--

--

G301 (Chevrolet)

At base of LH B pillar

86

--

--

G301 (Oldsmobile)

At base of LH B pillar

88

--

--

P405

Rear underside of vehicle, above fuel tank

86

--

--

S102

Engine wiring harness, at RH side of radiator approximately 17 cm (7 in) from U/H electrical center #1 breakout

--

--

--

S105

Engine wiring harness, below engine coolant fans approximately 13 cm (5 in) from engine coolant fan #1 breakout

--

--

--

S106

Engine wiring harneson LH side of engine compartment above transaxle approximately 7 cm (3 in) from C111 (automatic transaxle connector)

--

--

--

S107

Engine wiring harnes above ignition control module approximately 2 cm (1 in) from ignition control module C2 breakout

--

--

--

S109

Engine jumper harnes, below intake plenum approximately 2 cm (1 in) from fuel injector #2 breakout

--

--

--

S115 (4T60-E)

Automatic transaxle harness, inside transaxle approximately 11 cm (4 in) from C111r

--

--

--

S115 (4T65-E)

Automatic transaxle harness, inside transaxle approximately 19 cm (7 in) from C113

--

--

--

S116

Engine wiring harnes at RH front corner of engine compartment approximately 4 cm (2 in) from PCM breakout

--

--

--

S121

Engine jumper harnes below intake plenum approximately 2 cm (1 in) from PCM breakout

--

--

--

S122

Engine wiring harnes,on RH side of engine compartment approximately 15 cm (6 in) from PCM breakout

--

--

--

S128

Engine wiring harnes, at RH front corner of engine compartment approximately 6 cm (2 in) from PCM breakou

--

--

--

S139

Engine wiring harnes, at RH rear corner of engine compartment approximately 17 cm (7 in) from C155 breakou

--

--

--

S142

Engine wiring harnes, on RH side of engine compartment approximately 11 cm (4 in) from PCM breakou

--

--

--

S146

Engine wiring harnes, on RH side of engine compartment approximately 15 cm (6 in) from PCM breakou

--

--

--

S155

Engine wiring harnes, at RH side of radiator approximately 7 cm (3 in) from U/H electrical center #1 breakou

--

--

--

S156

Engine wiring harnesnear generator approximately 34 cm (13 in) from C102 breakout

--

--

--

S157

Engine wiring harnes, at RH side of radiator approximately 16 cm (6 in) from U/H electrical center #1 breakout

--

--

--

S158

Engine wiring harnes, at RH side of radiator approximately 10 cm (4 in) from U/H electrical center #1 breakout

--

--

--

S163

Engine wiring harnes, at RH side of radiator approximately 10 cm (4 in) from RH engine coolant fan breakout

--

--

--

S165

Engine wiring harness, front of transaxle approximately 7 cm (3 in) from engine ground breakout

--

--

--

S170

Wiper wiring harness, near LH strut tower approximately 7 cm (3 in) from brake motor breakout

--

--

--

S171

Wiper wiring harness, along LH front frame rail approximately 4 cm (2 in) from windshield washer pump breakout

--

--

--

S202 (Chevrolet)

I/P wiring harness below center of I/P approximately 15 cm (6 in) from C240 breakout

--

--

--

S202 (Oldsmobile)

I/P wiring harness below center of I/P approximately 4 cm (2 in) from radio breakout

--

--

--

S206

I/P wiring harness below I/P compartment approximately 11 cm (4 in) from blower motor relay breakout

--

--

--

S209 (Chevrolet)

I/P wiring harness, behind RH side of driver knee bolster approximately 5 cm (2 in) from C201 breakout

--

--

--

S209 (Oldsmobile)

I/P wiring harness, behind RH side of driver knee bolster approximately 3 cm (1 in) from DLC breakout

--

--

--

S211 (Chevrolet)

I/P wiring harness, behind RH side of instrument cluster approximately 4 cm (2 in) from radio breakout

--

--

--

S211 (Oldsmobile)

I/P wiring harness, near steering column approximately 6 cm (2 in) from G203 breakout

--

--

--

S217 (Chevrolet)

I/P wiring harness, behind RH side of driver knee bolster approximately 5 cm (2 in) from C201 breakout

--

--

--

S217 (Oldsmobile)

I/P wiring harness, below center of I/P approximately at radio breakout

--

--

--

S233 (Chevrolet)

I/P wiring harness, below I/P compartment approximately 4 cm (2 in) from I/P compartment lamp breakout

--

--

--

S233 (Oldsmobile)

I/P wiring harness, below I/P compartment approximately 4 cm (2 in) from C100 breakout

--

--

--

S237

I/P wiring harness, below I/P compartment approximately 5 cm (2 in) from blower motor relay breakout

--

--

--

S243 (Chevrolet)

I/P wiring harness, below I/P compartment approximately 4 cm (2 in) from C100 breakout

--

--

--

S243 (Oldsmobile)

I/P wiring harness, below I/P compartment approximately 10 cm (4 in) from vacuum/electric solenoid breakout

--

--

--

S305 (Chevrolet)

Crossbody wiring harness on LH side of rear seat approximately 7 cm (3 in) from C371 breakout

--

--

--

S305 (Oldsmobile)

Crossbody wiring harness between front seats approximately 8 cm (3 in) from seat belt switch breakout

--

--

--

S425

Fuel tank wiring harness below rear of vehicle approximately 43 cm (17 in) from C405

--

--

--