GM Service Manual Online
For 1990-2009 cars only
Table 1: Fuse Block--Rear Label Usage
Table 2: Fuse Block -- Underhood Label Usage
Table 3: Fuse Holder-- Steering Column Usage

Fuse Block--Rear Label (F55)


Object Number: 945361  Size: MF

Fuse Block--Rear Label (F45)


Object Number: 945327  Size: MF

Fuse Block--Rear Label Usage

No.

Fuse/Circuit Breaker

Rating

Description

1

F/PMP

20A

F/PMP Relay 39

2

HVAC BLO Fuse

30A

Blower Motor Control Processor

3

MEM T &T Fuse

10A

Adaptive Seat Lumbar Module - Driver, Adaptive Seat Lumbar Module - Front Passenger, Seat Lumbar Switch - Driver, Memory Seat Module (MSM), Seat Adjuster Switch - Driver, Steering Column Module

4

SDAR Fuse

5A

Digital Radio Receiver

5

DRVMDL Fuse

10A

Driver Door Module (DDM)

6

HTDST LR Fuse

10A

Heated Seat Module - LR

7

PWR T & T Fuse

30A

Steering Column Module

8

SIR Fuse

15A

Inflatable Restraint Side Impact Module - LF, Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint Side Impact Module - RF

9

--

--

Not Used

10

LP PK R Fuse

15A

Marker Lamp - RF, Park/Turn Signal Lamp - RF, Tail Lamps - Right, Relay Block - Rear

11

VENT SOL Fuse

10A

Evaporative Emission (EVAP) Canister Vent Solenoid

12

IGN 1 Fuse

10A

TCC/Cruise Release Switch, Instrument Panel Cluster (IPC), Relay Block - Rear (w/ UY4), Rear Integration Module (RIM), Turn Signal Switch, Steering Wheel Controls

13

LP PK L Fuse

15A

Marker Lamp - LF, Park/Turn Signal Lamp - LF, Tail Lamps - Left, Relay Block - Rear

14

DIMR Fuse

10A

Dash Integration Module (DIM), Generator

15

NAV Fuse

10A

Traffic Information Receiver (VICS), Radio (U3R, U3S, U3Q, U45)

16

HTDST LF Fuse

10A

Heated Seat Module - LF

17

EXPORT LGT Fuse

15A

STANDING LP Relay, POSN LP L Relay, POSN LR R Relay, RR FOG LP Relay, DRL Relay

18

RRDR MDL Fuse

10A

Left Rear Door Module (LRDM), Right Rear Door Module (RRDM)

19

STOP LP Fuse

15A

Stop Lamp Switch

20

NSBU Fuse

10A

PARK Relay 44, REVERSE Relay 45

21

AUDIO Fuse

15A

Cellular Telephone Module, Remote Playback Device - CD Changer

22

RAP Fuse

20A

RAP Relay 46

23-24

--

--

Not Used

25

PASSMDL Fuse

10A

Front Passenger Door Module (FPDM)

26

BODY Fuse

15A

F/TNKDR REL Relay 50, TRK REL Relay 52

27

INT LP Fuse

10A

INT LP Relay 51

28

RR BLO Fuse

10A

RR BLO Relay 47

29

IGN SW Fuse

15A

Ignition Switch, Dash Integration Module (DIM), Rear Integration Module (RIM), Remote Control Door Lock Receiver (RCDLR)

30

--

--

Not Used

31

HTDST RF Fuse

10A

Heated Seat Module - RF

32

CVRTD Fuse

10A

Automatic Level Control (ALC) Module, Electronic Suspension Control (ESC) Module, DAMPER Relay 48 (F45)

MRCVRTD Fuse

20A

Electronic Suspension Control (ESC) Module (F55)

33

HVAC Fuse

10A

Recirculation Actuator, Air Temperature Actuator - Left, Air Temperature Sensor - Inside, Mode Actuator, Air Temperature Actuator - Right, Mode Actuator - Auxiliary, HVAC Control Assembly - Auxiliary, Reverse Lockout Solenoid

34

IGN 3 RR Fuse

10A

Adaptive Seat Lumbar Module - Driver, Adaptive Seat Lumbar Module - Front Passenger, ALC Module, CVRSS Module, Instrument Panel Integration Module (IPM), Heated Seat Module - Driver, Heated Seat Module - LR, Heated Seat Module - Front Passenger, Heated Seat Module - RR

35

ABS Fuse

10A

Electronic Brake Control Module (EBCM)

36

TSIG/HAZ Fuse

15A

Hazard Switch

37

HTDST RR Fuse

10A

Heated Seat Module - RR

38

DIM Fuse

10A

Dash Integration Module (DIM), Generator

39

F/PMP Relay

--

Fuel Pump Assembly, Powertrain Control Module (PCM)

40

PRK LP Relay

--

DIMR Fuse 14, LP PK L Fuse 13, LP PK R Fuse 10

41

IGN 1 Relay

--

IGN 1 Fuse 12, SIR Fuse 8, VENT SOL Fuse 11

42

PARK BRK A Relay

--

Park Brake Release Switch

43

PARK BRK B Relay

--

Park Brake Release Switch

44

PARK Relay

--

Stop Lamp Switch

45

REVERSE Relay

--

Backup Lamp - Left, Backup Lamp - Right, Rear Object Sensor Control Module, Inside Rearview Mirror

46

RAP Relay

--

Sunroof Module (w/ CF5)

47

RR BLO Relay

--

Blower Motor - Auxiliary

48

--

--

Not Used

49

IGN 3 Relay

--

ABS Fuse 35, HVAC Fuse 33, IGN 3 RR Fuse 34

50

F/TNKDR REL Relay

--

Fuel Door Lock Release Switch

51

INT LP Relay

--

Footwell Courtesy Lamp - Left, Door Courtesy Lamp - LF, Door Courtesy Lamp - RF, I/P Compartment Lamp, Door Courtesy Lamp - LR, Door Courtesy Lamp - RR, Overhead Console, Reading Lamp - Left, Reading Lamp - Right, Footwell Courtesy Lamp - Right, Rear Compartment Lamp, Vanity Mirror Lamp - Left, Vanity Mirror Lamp - Right, Rear Integration Module (RIM)

52

TRK REL Relay

--

Rear Compartment Lid Release Switch

53

FRT CTSY Relay

--

Footwell Courtesy Lamp - Left, Footwell Courtesy Lamp - Right, Door Courtesy Lamp - LF, Door Courtesy Lamp - RF, Door Courtesy Lamp - LR, Door Courtesy Lamp - RR, Overhead Console

54

RR CTSY Relay

--

Reading Lamp Switch - Left, Reading Lamp Switch - Right

55

ELC Relay

--

Automatic Level Control (ALC) Compressor

56

PWR SEAT Circuit Breaker

30A

Seat Lumbar Switch - Driver, Seat Lumbar Switch - Front Passenger, Memory Seat Module (MSM), Seat Adjuster Switch - Driver, Seat Adjuster Switch - Front Passenger

57

PWR WDO Circuit Breaker

30A

Driver Door Module (DDM), Front Passenger Door Module (FPDM), Left Rear Door Module (LRDM), Right Rear Door Module (RRDM)

58

CIGAR Relay

--

AUX PWR Fuse 22 (Underhood Fuse Block), C/LTR Fuse 23 (Underhood Fuse Block)

59

RR DEFOG Relay

--

Rear Window Defogger Grid

60

PARK BRK Fuse

20A

PARK BRK A Relay 42, PARK BRK B Relay 43

61

RR DEFOG Fuse

40A

RR DEFOG Relay 59

62

EXPORT BRK Fuse

25A

Power Brake (P/B) Booster Pump Relay

63

AUDIO AMP Fuse

30A

Radio, Cellular Telephone Module, Remote Playback Device - CD Changer

64

ELC Fuse

30A

ELC Relay 55, Automatic Level Control (ALC) Compressor

65

CIGAR Fuse

40A

CIGAR Relay 58

66

--

--

Not Used

67-75

--

--

Spare Fuses

Fuse Block -- Rear Top View


Object Number: 756774  Size: MF

Fuse Block -- Rear Bottom View


Object Number: 945369  Size: MF

Fuse Block -- Underhood Label


Object Number: 946591  Size: MF

Fuse Block -- Underhood Label Usage

No.

Fuse/Circuit Breaker

Rating

Description

1

ALDL Fuse

10A

Data Link Connector (DLC), Valet Switch

2

ACCY Fuse

10A

Outside Moisture Sensor, Windshield Wiper/Washer Switch

3

WSW Fuse

30A

Windshield Wiper Motor

4

--

--

Not Used

5

HDLOBML Fuse

15A

Headlamp - Low Beam - Left

6

HDLOBMR Fuse

15A

Headlamp - Low Beam - Right

7

I/P Fuse

15A

Ignition Key Cylinder Lamp, Instrument Panel Cluster (IPC), Instrument Panel Integration Module (IPM)

8

PCM BATT Fuse

10A

Powertrain Control Module (PCM), Theft Deterrent Module

9

HDHIBMR Fuse

10A

Headlamp - High Beam - Right

10

HDHIBML Fuse

10A

Headlamp - High Beam - Left

11

IGN 1 Fuse

10A

Evaporative Emissions (EVAP) Canister Purge Solenoid, Exhaust Gas Recirculation (EGR) Valve, Mass Air Flow (MAF) Sensor

12

Fog Fuse

10A

FOG LP Relay 29

13

TRANS Fuse

10A

1 - 2 Shift Solenoid (1 - 2 SS) Valve, 2 - 3 Shift Solenoid (2 - 3 SS) Valve, Torque Converter Clutch (TCC) Solenoid Valve

14

CR CONT Fuse

10A

Cruise Control Module

15

COIL MDL Fuse

20A

Ignition Control Module (ICM) Bank 1, Ignition Control Module (ICM) Bank 2

16

INJR2 Fuse

10A

Fuel Injector 2, Fuel Injector 3, Fuel Injector 5, Fuel Injector 8

17-18

--

--

Not Used

19

PCM IGN Fuse

20A

Powertrain Control Module (PCM)

20

OXY SENS Fuse

10A

Heated Oxygen Sensor (H02S) Bank 1 Sensor 2, Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

21

INJR1 Fuse

10A

Fuel Injector 1, Fuel Injector 4, Fuel Injector 6, Fuel Injector 7

22

AUX PWR Fuse

20A

Auxiliary Power Outlet

23

C/LTR Fuse

20A

Cigar Lighter, Cigar Lighter - Rear

24

DRL Fuse

15A

DRL Relay 30, FOG LP Relay 29

25

HORN Fuse

15A

HORN Relay 31

26

AC CLU Fuse

15A

A/C CLU Relay 32

27

HDLP HI BM Relay

--

HDHIBML Fuse 10, HDHIBMR Fuse 9

28

HDLP LO BM Rela

--

HDLOBML Fuse 5, HDLOBMR Fuse 6

29

FOG LP Relay

--

Fog Lamp - LF, Fog Lamp - RF

30

DRL Relay

--

Headlamp - High Beam - Left, Headlamp - High Beam - Right

31

HORN Relay

--

Horn - A Note, Horn - F Note

32

A/C CLU Relay

--

A/C Compressor Clutch

33

--

--

Not Used

34

ACCY Relay

--

ACCY Fuse 2, WSW Fuse 3

35

--

--

Not Used

36

START 1 Relay

--

Starter Solenoid

37

COOLFAN 1 Rela

--

Series circuit function-supplies voltage through the LH cooling fan motor to the RH cooling fan motor for low speed operation

Parallel circuit function-supplies voltage to the LH cooling fan motor for high speed operation

38

IGN 1 Relay

--

INJR1 Fuse 21, INJR2 Fuse 16, OXY SEN A Fuse, OXY SEN B Fuse, DIS Fuse, CR CONT Fuse, IGN 1 Fuse, PCM IGN Fuse

39

COOL FAN S/P Relay

--

Series circuit function-connects the LH and RH cooling fan motor circuits together for low speed operation

Parallel circuit function-connects the LH cooling fan motor to ground for high speed operation

40

COOLFAN 2 Relay

--

Parallel circuit function-supplies voltage to the RH cooling fan motor for high speed operation

41

START Circuit Breaker

30A

START 1 Relay 36

42

HDLP WASH Circuit Breaker

30A

Headlamp Washer Pump Motor (Export)

43

--

--

Not Used

44

ABS Fuse

50A

Electronic Brake Control Module (EBCM)

45

AIR Pump Fuse

50A

Secondary Air Injection Pump, Secondary Air Injection Relay

46

COOL FAN 1 Fuse

30A

COOL FAN 1 Relay 37

47

COOL FAN 2 Fuse

30A

COOL FAN 2 Relay 40, COOL FAN S/P Relay 39

48-52

--

--

Sare Fuse

53

--

--

Fuse Puller

Fuse Block -- Underhood Top View


Object Number: 756771  Size: MF

Fuse Block -- Underhood Bottom View


Object Number: 961100  Size: MF

Fuse Holder-- Steering Column


Object Number: 599553  Size: MF

Fuse Holder-- Steering Column Usage

No.

Fuse/Circuit Breaker

Rating

Description

1

Dimming

2A

Steering Wheel Controls Illumination

2

Switches

2A

Steering Wheel Audio Controls

3

Cruise

2A

Steering Wheel Cruise Control

4

Horn

2A

Horn Switch