GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Fuse Block - Underhood Label


Object Number: 2182150  Size: LF

Fuse Block - Underhood Label

No.

Device Label Name

Device Assigned Name

Rating

Description

1

--

F1UA Fuse

15A

Transmission Control Module

2

--

F2UA Fuse

15A

Engine Control Module

3

--

Not Used

N/A

Not Used

5

--

F5UA Fuse

15A

Transmission Control Module, Engine Control Module, Mass Air Flow/Intake Air Temperature Sensor, Output Speed Sensor

6

--

F6UA Fuse

30A

Windshield Wiper Relays

7

--

Not Used

N/A

Not Used

8

--

F8UA Fuse

15A

Fuel injectors

9

--

F9UA Fuse

15A

Ignition Coil, Fuel Injectors

10

--

F10UA Fuse

15A

Engine Control Module, Output Speed Sensor

11

--

F11UA Fuse

10A

Heated Oxygen Sensors

12

--

F12UA Fuse

30A

Starter Motor

13

--

F13UA Fuse

7.5A

Evaporative Emission (EVAP) Canister Vent Solenoid Valve

14

--

Not Used

N/A

Not Used

15

--

Not Used

N/A

Not Used

16

--

F16UA Fuse

7.5A

Air Quality Sensor

17

--

F17UA Fuse

5A

Inflatable Restraint Sensing and Diagnostic Module

18

--

F18UA Fuse

10A

Fuel Pump Control Module

19

--

Not Used

N/A

Not Used

20

--

F20UA Fuse

20A

Fuel Pump Relay

21

--

F21UA Fuse

30A

Windows Motors, Front Door

22

--

Not Used

N/A

Not Used

23

--

Not Used

N/A

Not Used

24

--

F24UA Fuse

30A

Windows Motors, Front Door

25

--

Not Used

N/A

Not Used

26

--

F26UA Fuse

40A

Electronic Brake Control Module (EBCM)

27

--

F27UA Fuse

30A

Remote Control Door Lock Receiver

28

--

F28UA Fuse

40A

Rear Defogger Grid

29

--

Not Used

N/A

Not Used

30

--

F30UA Fuse

15A

Electronic Brake Control Module (EBCM)

31

--

F31UA Fuse

20A

Body Control Module

32

--

F32UA Fuse

20A

Body Control Module

33

--

F33UA Fuse

30A

Heated Seat Control Module

34

--

F34UA Fuse

25A

Sunroof Control Module

35

--

F35UA Fuse

30A

Audio Amplifier

36

--

Not Used

N/A

Not Used

37

--

F37UA Fuse

10A

Headlamp - Right High Beam

38

--

F38UA Fuse

10A

Headlamp - Left High Beam

39-40

--

Not Used

N/A

Not Used

41

--

Not Used

N/A

Not Used

42

--

F42UA Fuse

20A/30A

Cooling Fan Relays, Cooling Fan Motor

43

--

Not Used

N/A

Not Used

44

--

Not Used

N/A

Not Used

45

--

F45UA Fuse

30A/40A

Cooling Fan High Speed Relay, Cooling Fan Motor

46

--

F46UA Fuse

10A

Cooling Fan Relays

47

--

F47UA Fuse

10A

Heated Oxygen Sensors, Throttle Body

48

--

F48UA Fuse

15A

Fog Lights, Front

49

--

Not Used

N/A

Not Used

50

--

Not Used

N/A

Not Used

51

--

F51UA Fuse

15A

Horn

52

--

F52UA Fuse

5A

Instrument Cluster

53

--

F53UA Fuse

10A

Inside Rearview Mirror

54

--

F54UA Fuse

5A

Headlamp Switch, Electrical Auxiliary Heater, HVAC Control Module

55

--

F55UA Fuse

7.5A

Window Switches, Front, Mirror Switch

56

--

F56UA Fuse

15A

Windshield Washer Pump

57

--

F57UA Fuse

15A

Steering Column Lock Control Module

58

--

Not Used

N/A

Not Used

59

--

F59UA Fuse

30A

Fuel Heater

60

--

F60UA Fuse

7.5A

Outside Rearview Mirrors

61

--

Not Used

N/A

Not Used

62

--

F62UA Fuse

10A

A/C Compressor Clutch Relay, A/C Compressor Clutch

63

--

Not Used

N/A

Not Used

64

--

F64UA Fuse

5A

Inflatable Restraint Sensing and Diagnostic Module

65

--

Not Used

N/A

Not Used

66

--

Not Used

N/A

Not Used

67

--

F67UA Fuse

20A

Fuel Pump Control Module

68

--

Not Used

N/A

Not Used

69

--

F69UA Fuse

5A

Body Control Module

70

--

F70UA Fuse

5A

Rain Sensor

71

--

Not Used

N/A

Not Used

1

--

KR29 A/C Compressor Clutch Relay

--

A/C Compressor Clutch

2

--

KR27 Starter Relay

--

Starter

3

--

KR20F Cooling Fan Relay

--

Cooling Fan

4

--

KR12C Windshield Wiper Speed Control Relay

--

Windshield Wiper Speed Control

5

--

KR12B Windshield Wiper Relay

--

Windshield Wiper

6

--

Not Used

--

Not Used

7

--

KR75 Powertrain Relay

--

Powertrain

8

--

KR23A Fuel Pump Relay

--

Fuel Pump

9

--

KR20A Cooling Fan Medium Speed 1 Relay

--

Cooling Fan Medium Speed 1

10

--

KR20B Cooling Fan Medium Speed 2 Relay

--

Cooling Fan Medium Speed 2

11

--

Not Used

--

Not Used

12

--

KR20E Cooling Fan Speed Control Relay

--

Cooling Fan Speed Control (Or in Relay Block - Under-bonnet)

13

--

KR20D Cooling Fan High Speed Relay

--

Cooling Fan High Speed

14

--

Not Used

--

Not Used

15

--

KR73 Ignition Main Relay

--

Ignition Main

16

--

KR22 Fuel Heater Relay

--

Fuel Heater

17

--

KR5 Rear Window Defogger Relay

--

Rear Window Defogger

Note:  Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block.

--

--

KR3 Horn Relay

--

Horn

--

--

KR11 Windshield Washer Pump Relay

--

Windshield Washer Pump

--

--

KR46 Front Fog Lamp Relay

--

Front Fog Lamps

--

--

KR48 Headlamp High Beam Relay

--

Headlamp High Beam

Figure 2:

Fuse Block - Underhood Top View


Object Number: 2182151  Size: LF
Figure 3:

Fuse Block - Underhood Bottom View


Object Number: 2182153  Size: LF
Figure 4:

Relay Block - Underhood Label


Object Number: 309512  Size: CH

No.

Device Label Name

Device Assigned Name

Rating

Description

1

--

KR20E Cooling Fan Speed Control Relay

--

Cooling Fan Speed Control

2

--

KR20G Cooling Fan Left Low Speed Relay

--

Cooling Fan Left Low Speed

3

--

KR20H Cooling Fan Right Low Speed Relay

--

Cooling Fan Right Low Speed

Figure 5:

Fuse Block - Battery Auxiliary Label


Object Number: 309512  Size: CH

No.

Device Label Name

Device Assigned Name

Rating

Description

5

--

F5UB Fuse

80A

Glow Plug Control Module

6

--

F6UB Fuse

100A

Electrical Auxiliary Heater

7

--

Not Used

N/A

Not Used

8

--

Not Used

N/A

Not Used

Figure 6:

Fuse Block - Battery Auxiliary Top View


Object Number: 2182154  Size: LF
Figure 7:

Fuse Block - Battery Usage


Object Number: 309512  Size: CH

No.

Device Label Name

Device Assigned Name

Rating

Description

1

--

F1UD Fuse

100A

Fuse Block - Instrument Panel

2

--

F2UD Fuse

100A

Fuse Block - Instrument Panel

3

--

F3UD Fuse

60A

Electrical Power Steering (EPS)

4

--

Not Used

N/A

Not Used

5

--

F5UD Fuse

250A

Fuse Block - Battery Auxiliary

6

--

F6UD Fuse

250A/500A

Starter Motor / Dynamo

Figure 8:

Fuse Block - Battery Top View


Object Number: 2182155  Size: LF
Figure 9:

Fuse Block - I/P Usage


Object Number: 309512  Size: CH

No.

Device Label Name

Device Assigned Name

Rating

Description

1

--

F1DA Fuse

10A

Mobile Telephone Control Module

2

--

Not Used

N/A

Not Used

3

--

F3DA Fuse

25A

Body Control Module

4

--

F4DA Fuse

20A

Radio

5

--

F5DA Fuse

7.5A

Parking Assist Control Module, Power Sounder, Multifunction Switch - Center Console, Display

6

--

F6DA Fuse

20A

Cigar Lighter - Front

7

--

F7DA Fuse

20A

Accessory Power Outlet - Centre Console 1/2

8

--

F8DA Fuse

30A

Body Control Module

9

--

F9DA Fuse

30A

Body Control Module

10

--

F10DA Fuse

30A

Body Control Module

11

--

F11DA Fuse

40A

Blower Motor Control Module

12

--

Not Used

N/A

Not Used

13

--

F13DA Fuse

25A

Heated Seat Control Module

14

--

F14DA Fuse

7.5A

Data Link Connector, Oil Feeding Connector

15

--

F15DA Fuse

10A

Inflatable Restraint Sensing and Diagnostic Module

16

--

F16DA Fuse

10A

Rear Compartment Lid Release Relay

17

--

F17DA Fuse

15A

HVAC Control Module / HVAC Control Assembly

18

--

Not Used

N/A

Not Used

19

--

Not Used

N/A

Not Used

20

--

Not Used

N/A

Not Used

21

--

F21DA Fuse

15A

Instrument Cluster

22

--

F22DA Fuse

2A

Ignition Switch / Remote Control Door Lock Receiver

23

--

F23DA Fuse

20A

Body Control Module

24

--

F24DA Fuse

20A

Body Control Module

25

--

F25DA Fuse

20A

Steering Column Lock Control Module

26

--

Not Used

N/A

Not Used

Note: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block.

--

--

KR70 Auxiliary Power Relay

--

Auxiliary Power

--

--

KR95B Rear Compartment Lid Release Relay

--

Rear Compartment Lid Release

--

--

KR104A Logistic Mode Relay 1

--

Logistic Mode 1

Figure 10:

Fuse Block - I/P Top View Relays


Object Number: 2182156  Size: LF
Figure 11:

Fuse Block - I/P Top View Fuses


Object Number: 2182157  Size: LF
Figure 12:

Fuse Block - I/P Bottom View


Object Number: 2182160  Size: LF