GM Service Manual Online
For 1990-2009 cars only

Engine Controls Components Component Locations

Figure 1:

Engine Component View -- Vin 1


Object Number: 12234  Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Idle Air Control (IAC) Valve
(3)Mass Air Flow (MAF) Sensor
(4)Throttle Position (TP) Sensor
(5)Bypass Valve Actuator
(6)Boost Control Solenoid
(7)Ignition Control Module
(8)Crankshaft Position (CKP) Sensor
(9)Camshaft Position (CMP) Sensor
(10)EVAP Canister Purge Valve
(11)Heated Oxygen Sensor 1 (HO2S 1)
(12)Manifold Absolute Pressure (MAP) Sensor
(13)PCV Valve
Figure 2:

Engine Component View Vin K


Object Number: 12235  Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Idle Air Control (IAC) Valve
(3)Mass Air Flow (MAF) Sensor
(4)Throttle Position (TP) Sensor
(5)Engine Oil Level Switch
(6)Ignition Control Module
(7)Crankshaft Position (CKP) Sensor
(8)Camshaft Position (CMP) Sensor
(9)EVAP Canister Purge Valve
(10)PCV Valve
(11)Heated Oxygen Sensor 1 (HO2S 1)
(12)Manifold Absolute Pressure (MAP) Sensor
Figure 3:

Buick Underhood Electrical Center Location


Object Number: 74277  Size: SH
Figure 4:

Buick Underhood Electrical Center Details


Object Number: 107547  Size: SF
(1)Cool Fan 2 Maxifuse (30A)
(2)Crank Maxifuse (40A)
(3)Battery #3 Maxifuse (60A)
(4)Battery #2 Maxifuse (60A)
(5)Ignition 1 Maxifuse (30A)
(6)Cool Fan 1 Maxifuse (40A)
(7)Battery #1 Maxifuse (60A)
(8)Ignition 2 Maxifuse (40A)
(9)Cool Fan 2 Relay
(10)Cool Fan 2 Relay
(11)Starter Enable Relay
(12)Cool Fan 1 Relay
(13)Ignition Main Relay
(14)--
(15)A/C Clutch Relay
(16)Horn Relay
(17)Fog Lamp Relay
(18)Fuel Pump Speed Control Relay
(19)Fuel Pump Relay
(20)--
(21)Generator (10A)
(22)ECM (10A)
(23)A/C Clutch (10A)
(24)--
(25)Elek Ignition (15A)
(26)Trans (10A)
(27)Horn (15A)
(28)Fuel Injector (15A)
(29)Oxygen Sensor (15A)
(30)Engine Emission (10A)
(31)--
(32)Right Headlamp (15A)
(33)R/CMPT REL (7.5A)
(34)Park Lamp (20A)
(35)Fuel Pump (15A)
(35)Left Headlamp (15A)
(37)Spare
(38)Spare
(39)Spare
(40)Spare
(41)Spare
(42)Spare
(43)Fuse Puller

1997 W-car Buick 3.8 VIN K and VIN 1 Component Location Table

Name

Location

Locator View (Section 8A-201 figure no.)

Connector End View

Group No.

1-2 Shift Solenoid Valve

Inside automatic transaxle

--

--

--

2-3 Shift Solenoid Valve

Inside automatic transaxle

--

--

--

A/C Compressor Clutch Coil

Part of A/C compressor, lower RH front of engine

9

--

--

A/C Refrigerant Pressure Sensor

RH side of engine compartment, on accumulator

37

--

--

Automatic Transaxle

LH side of engine

11

--

--

Automatic Transaxle Fluid Pressure Manual Valve Position Switch

Inside automatic transaxle

--

202-40

--

Automatic Transaxle Fluid Temperature (TFT) Sensor

Inside automatic transaxle

--

--

--

Automatic Transaxle Input Shaft Speed Sensor

Inside automatic transaxle

--

--

--

Camshaft Position (CMP) Sensor

RH side of engine, above crankshaft pulley

28

--

--

Crankshaft Position (CKP) Sensor

RH side of engine at the end of crankshaft, behind harmonic balancer

26

--

--

Cruise Control Module

LH side of engine compartment, mounted to strut tower

41

34-1

--

Data Link Connector (DLC)

Below LH side of I/P, right of steering column

48

50-1

--

Engine Coolant Fan Motor #1 (LH)

Mounted on LH side of radiator

3

--

--

Engine Coolant Fan Motor #2 (RH)

Mounted on RH side of radiator

3

--

--

Engine Coolant Temperature (ECT) Sensor

Top LH side of engine below throttle body

--

--

--

Engine Oil Level Indicator Switch

In engine oil pan, front of engine, center of pan

24

--

--

Engine Oil Pressure Indicator Switch

RH lower rear of engine, above transaxle

25

--

--

Evaporative Emission (EVAP) Canister Purge Solenoid Valve (VIN K)

Top front of engine, near center of valve cover

23

--

--

Evaporative Emission (EVAP) Canister Purge Solenoid Valve (VIN 1)

Rear top of engine, near center of valve cover

33

--

--

Evaporative Emission (EVAP) Canister Purge Vacuum Diagnostic Switch

Rear top of engine, left of generator, above valve cover

33

--

--

Evaporative Emission (EVAP) Canister Vent Solenoid Valve

Behind LH side of rear fascia splash shield in wheel well

72

--

--

Exhaust Gas Recirculation (EGR) Valve (VIN K)

LH rear top of engine, near throttle body

30

202-52

--

Exhaust Gas Recirculation (EGR) Valve (VIN 1)

LH rear top of engine, near throttle body

30

202-52

--

Fuel Injectors

Top of engine, at each intake port

--

--

--

Fuel Pump Resistor

Mounted to outside RH front frame rail, forward of front wheel

35

--

--

Fuel Tank

Below rear of vehicle

--

202-53

--

Fuse Block

RH side of I/P in RF door opening

60

--

--

Generator

Top rear RH side of engine

31

202-54

--

Heated Oxygen Sensor (HO2S) #1

In rear bank exhaust manifold, behind center of engine

30

202-55

--

Heated Oxygen Sensor (HO2S) #2

In exhaust system, behind catalytic converter

10

202-55

--

Heater And A/C Control

Center of I/P

--

202-55

--

Idle Air Control (IAC) Valve (VIN K)

LH top of engine on throttle assembly

34

202-56

--

Idle Air Control (IAC) Valve (VIN 1)

LH rear of engine on supercharger

34

202-56

--

Ignition Control Module (ICM)

Top RH front of engine

26

202-57

--

Instrument Cluster

Top of I/P, above steering column

49

81-5

--

Intake Air Temperature (IAT) Sensor

LH front of engine compartment, in air cleaner duct

34

--

--

Knock Sensor #1

In engine block, rear center, below exhaust manifold

29

--

--

Knock Sensor #2

In engine block, front center, right of starter

24

--

--

Manifold Absolute Pressure (MAP) Sensor (VIN K)

Top of engine, RH side of intake manifold

23

--

--

Manifold Absolute Pressure (MAP) Sensor (VIN 1)

Top rear of engine, above valve cover

30

--

--

Mass Air Flow (MAF) Sensor

LH front of engine, in air cleaner duct

16

--

--

Powertrain Control Module (PCM)

front LH side of engine, inside air cleaner assembly

8

6E

--

Pressure Control Solenoid Valve

Inside automatic transaxle

--

--

--

Splice Pack SP205

Below I/P, RH side of steering column

55

202-64

--

Starter Solenoid

On top of starter, lower front of engine

17

--

--

Stoplamp Switch

Below LH side of I/P in right side of brake pedal bracket

46

202-65

--

Supercharger Bypass Valve

LH top of engine above front valve cover

32

--

--

Throttle Position (TP) Sensor

Top of engine on throttle assembly

34

--

--

Torque Converter Clutch Pulse Width Modulation Solenoid Valve

Inside Automatic Transaxle

--

--

--

Torque Converter Clutch Solenoid Valve

Inside Automatic Transaxle

--

--

--

Transaxle Range Switch

Left of engine on transaxle

11

202-65

--

Underhood (U/H) Electrical Center

RH side of engine compartment mounted to strut tower

5

202-66

--

Vehicle Speed Sensor (VSS)

Lower RH side of engine compartment, on transaxle

25

--

--

C101 (8 cavities)

I/P wiring harness to engine wiring harness, LH side of engine compartment near strut tower

41

202-0

--

C105 (4 cavities)

Engine wiring harness to fan jumper wiring harness, on radiator RH coolant fan

3

202-2

--

C110 (10 cavities)

Engine wiring harness to ignition control module harness, top of engine near ignition module

26

202-4

--

C111 (7 cavities)

Engine wiring harness to automatic transaxle wiring harness, LH side of engine compartment, top of transaxle

12

202-5

--

C113 (14 cavities)

Engine wiring harness to automatic transaxle wiring harness, LH side of engine compartment, top of transaxle

13

202-6

--

C125 (1 cavity)

Engine wiring harness to knock sensor jumper wiring harness, lower front of engine, left of knock sensor

29

202-7

--

C126 (3 cavities)

Engine wiring harness to engine coolant temperature sensor jumper wiring harness, top front of engine

23

202-8

--

C181 (6 cavities)

I/P wiring harness to engine wiring harness, RH engine compartment, front of strut tower

41

202-12

--

C200 (56 cavities)

I/P wiring harness to body wiring harness, behind RH side of I/P

61

202-13

--

C405 (8 cavities)

Body wiring harness to fuel tank wiring harness, rear compartment floor forward of spare tire well

67

202-36

--

G111

RH side of engine on ignition control module bracket

27

--

--

G113

Lower LH front of engine on transaxle stud

24

--

--

G117

Lower LH front of engine on transaxle stud

24

--

--

G200

Behind RH side of I/P compartment

61

--

--

G203

Below I/P, RH side of steering column

54

--

--

G402

Inside rear compartment, below RH side of rear window trim panel

71

--

--

P100

Lower RH side of dash panel

59

--

--

P101

Upper LH side of dash panel

41

--

--

S105

Engine wiring harness, front of engine compartment, approximately 4 cm (2 in) from C105 (engine coolant fan jumper connector) breakout

--

--

--

S106

Engine wiring harness, LH side of engine compartment, approximately 7 cm (3 in) from PCM breakout

--

--

--

S107 (VIN K)

Engine wiring harness, RH top of engine, approximately 10 cm (4 in) from generator breakout

--

--

--

S107 (VIN 1)

Engine wiring harness, LH top front of engine, approximately 4 cm (2 in) from C110 breakout

--

--

--

S109

Engine wiring harness, top LH of engine, approximately 6 cm (2 in) from C110 breakout

--

--

--

S115 (VIN K)

Automatic transaxle wiring harness, inside transaxle housing approximately 11 cm (4 in) from C111

--

--

--

S115 (VIN 1)

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

--

--

--

S121

Engine wiring harness, top of engine near throttle body, approximately 6 cm (2 in) from throttle position sensor breakout

--

--

--

S122

Engine wiring harness, LH side of engine compartment, approximately 19 cm (7 in) from transaxle connector breakout

--

--

--

S144

Ignition control module wiring harness top of engine near ignition control module, approximately 12 cm (5 in) from C110 breakout

--

--

--

S145

Ignition control module wiring harness top of engine near ignition control module, approximately 12 cm (5 in) from C110 breakout

--

--

--

S202

I/P wiring harness, RH side of steering column, approximately 8 cm (3 in) from splice pack SP205 breakout

--

--

--

S211

I/P wiring harness, RH side of steering column, approximately 20 cm (8 in) from instrument cluster breakout

--

--

--

S230

I/P wiring harness, approximately 18 cm (7 in) from radio breakout

--

--

--

S233

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

--

--

--

S234

I/P wiring harness, RH side of steering column, approximately 13 cm (5 in) from instrument cluster breakout

--

--

--

S270

I/P wiring harness, behind RH side of I/P, approximately 4 cm (2 in) from blower motor control module

--

--

--

S281

I/P wiring harness, RH side of steering column, approximately 20 cm (8 in) from G203 breakout

--

--

--

S409

Body wiring harness, LH floor under rear seat, approximately 51 cm (20 in) from C405

--

--

--