GM Service Manual Online
For 1990-2009 cars only

Fuse Block - I/P (Rear View)


Object Number: 559040  Size: MF

Pin

Wire Color

Circuit No.

Function

A2

DK BLU

75

RAP Relay Switch Supply Voltage

A3

YEL

343

Accessory Voltage

A6

RED

142

Battery Positive Voltage

A7

ORN

540

Battery Positive Voltage

B2-B4

--

--

Not Used

B6

RED

142

Battery Positive Voltage

B8

--

--

Not Used

C1

ORN

1140

Battery Positive Voltage

C3

ORN

640

Battery Positive Voltage

C5

ORN

840

Battery Positive Voltage

C7

ORN

140

Battery Positive Voltage

D2

WHT

1390

Off, Run, Crank Voltage

D4

DK GRN

44

Instrument Panel Lamps Dimmer Switch Signal

D6

YEL

5

Crank Voltage

D8

DK BLU

75

RAP Relay Switch Supply Voltage

E1

PNK

1020

Off, Run, Crank Voltage

E1

PNK

1020

Off, Run, Crank Voltage

E3

GRY

8

Instrument Panel Lamp Supply Voltage - 1

E5

PPL

806

Crank Voltage

E7

YEL

43

Accessory Voltage

F2-F4

--

--

Not Used

F6

RED

42

Battery Positive Voltage

F8

--

--

Not Used

G1

ORN

1740

Battery Positive Voltage

G3

ORN

1840

Battery Positive Voltage

G5

ORN

240

Battery Positive Voltage

G7

ORN

40

Battery Positive Voltage

H2-H4

--

--

Not Used

H6

PNK

3

Ignition Switch Output Ignition 1

H8-J1

--

--

Not Used

J3

PNK

139

Ignition 1 Voltage

J3

PNK

139

Ignition 1 Voltage

J5

YEL

1139

Ignition 1 Voltage

J7

PNK

39

Ignition 1 Voltage

K2

--

--

Not Used

K4

BRN

4

Accessory Voltage

K6

--

--

Not Used

K8

PPL

293

Rear Defogger Element Supply Voltage

L1

WHT

393

Rear Window Wiper Motor Control

L3

YEL

143

Accessory Voltage

L5

--

--

Not Used

L7

PPL

1093

Rear Defog Element Supply Voltage

M2-M4

--

--

Not Used

M6

ORN

300

Ignition 3 Voltage

M8-N1

--

--

Not Used

N3

BRN

441

Ignition 3 Voltage

N3

BRN

441

Ignition 3 Voltage

N5

BRN

141

Ignition 3 Voltage

N7

BRN

41

Ignition 3 Voltage

Fuse Block - I/P (Front View)


Object Number: 559038  Size: MF

Name

Fuse Number

Size

Circuit

Loads

STOP/HAZ

1

20A Fuse

140

Stop Lamp Switch, Turn Signal/Multifunction Switch

RADIO ACCY

2

10A Fuse

43

Radio, Driver Information Center (DIC), Rear Seat Audio (RSA) Controller

CTSY

3

20A Fuse

40

Courtesy Lamps, Dome/Reading Lamps, IP Compartment Lamp, Vanity Mirrors, Power Mirrors

GAUGES

4

10A Fuse

39

Driver Information Center, Multifunction Alarm Module, IP Cluster, H/L Switch

RR DEFOG

5

30A Fuse

1093

Not Used

CRUISE

6

10A Fuse

4

Cruise Control Module and Switch

AUX PWR

7

25A Fuse

840

Auxiliary Power Outlets, Sub-Woofer Amplifier, DLC

CRANK

8

10A Fuse

5

Ignition Switch Output Crank

PK LPS

9

20A Fuse

240

Headlamp and Panel Dimmer Switch

AIR BAG

10

10A Fuse

1139

SDM

11

Not Used

HTR-A/C

12

20A Fuse

141

Upfitter Accessory Relay, A/C Relay (Rear), Temperature Control Motor

CIG LTR

13

20A Fuse

640

LH and RH Lower Door Lock Switches, Cigar Lighter

ILLUM

14

10A Fuse

8

IP Cluster, HVAC Controls, RR HVAC Controls, IP Switches, Radio Illumination, Multifunction Alarm Module, Overhead Console

BCM

15

10A Fuse

1840

Body Control Module

TURN-B/U

16

20A Fuse

139(2)

Turn Signal/Multifunction Switch, Park/Neutral Position Switch

WIPER

17

25A  Fuse

143

Wipers

BRAKE

18

10A  Fuse

441(2)

Stop Lamp Switch, Brake Pressure Modulator Valve, PCM

RADIO BATT

19

10A  Fuse

1140

Radio (Battery)

TRANS

20

10A  Fuse

1020(2)

IP Cluster, Transmission

PWR ADJ MIR

21

5A  Fuse

1740

Power Mirrors

22

Not Used

RR WIPER

23

20A  Fuse

393

Rear Window Wiper/Washer Switch

--

24

--

--

Not Used

PWR ACCY

A

30A C/B

540

Power Door Lock, 6-Way Power Steering, Keyless Entry Module, Liftgate Module

WINDOWS

B

30A C/B

343

Power Windows

Relay Block No. 1


Object Number: 783037  Size: MF

Connector Part Information

    • 40024201
    • 20-Way Cassette Type (BLK)

Pin

Wire Color

Circuit No.

Function

1

LT BLU

1344

Trunk Release Relay Control

2

ORN

540

Battery Positive Voltage

3

TAN

294

Door Lock Actuator Unlock Control

4

TAN

246

Rear Door Lock Actuator Unlock Control

5

ORN

540

Battery Positive Voltage

6

LT GRN

1391

Left Front Door Lock Relay Control

7

ORN

540

Battery Positive Voltage

8

BLK

1050

Ground

9

TAN

694

Driver Door Lock Actuator Unlock Control

10

ORN

540

Battery Positive Voltage

11

GRY/BLK

690

Courtesy Lamp Relay Control

12

WHT

156

Courtesy Lamp Switch Signal

13

--

--

Not Used

14

BLK

750

Ground

15

ORN

1732

Courtesy Lamp Supply Voltage

16

DK BLU

1393

Courtesy Lamp Relay Control

17

ORN

40

Battery Positive Voltage

18

--

--

Not Used

19

ORN

1732

Courtesy Lamp Supply Voltage

20

ORN

40

Battery Positive Voltage

Relay Block No. 2


Object Number: 783039  Size: MF

Connector Part Information

    • 40024202
    • 10-Way Cassette Type (BLK)

Pin

Wire Color

Circuit No.

Function

1

BLK

755

RAP Relay Coil Control

2

RED

742

Battery Positive Voltage

3

BRN

4

Accessory Voltage

4

DK BLU

75

RAP Relay Switch Supply Voltage

5

RED

742

Battery Positive Voltage

6

PNK

39

Ignition 1 Voltage

7

BLK

750

Ground

8

PPL

544

Headlamp Low Beam Supply Voltage

9

WHT

815

DRL Diode Signal

10

LT GRN/BLK

592

DRL Relay Control

Fuse Block - Underhood (Front View)


Object Number: 791131  Size: LF

Name

Cavity Number

Size

Circuit

Loads

DIODE - A/C COIL

K3-L4

1AMP - 400V Diode - 280 Series

59

A/C Clutch

RH HEADLAMP

H5-J6

15A Fuse

312

RH Headlamp

LH HEADLAMP

K5-L6

15A Fuse

712

LH Headlamp

ENG-I

F7-G8

20A Fuse

539

All Oxygen Sensor, PCM, MAF Sensor, Camshaft Position Sensor, EGR Valve, Evaporative Emission (EVAP) Canister Purge Solenoid

IGN-E

H7-J8

10A Fuse

639

A/C Enable Relay

ECM-I

K7-L8

20A Fuse

439

Fuel Injectors, PCM, Crankshaft Position Sensor, Ignition Control Module

RR HEAT-A/C

F9-G10

30A Fuse

1040

Rear Heat, Rear A/C

ATC

H9-J10

20A Fuse

1540

Active Transfer Case

FRT HVAC

K9-L10

30A Fuse

340

Front HVAC

ECM-B

F11-G12

20A Fuse

440

Fuel Pump Relay, PCM, Engine Oil Pressure Switch and Sender

HORN

H11-J12

20A Fuse

740

Horn Relay

A/C COMP

K11-L12

10A Fuse

1240

A/C Enable Relay

RR DEFOG

M1-N1

40A Fuse

1440

Heated Mirror, Rear Defogger

RAP (Retained Accessory Power)

M2-N2

40A Fuse

742

Retained Accessory Power

ABS

M4-N4

60A Fuse

442

Electronic Brake Control Module (EBCM)

IGN-B

M5-N5

40A Fuse

342

IGN-B Switch to IP Fuse Block Bus Bars

IGN-A

M6-N6

40A Fuse

242

IGN-A Switch to IP Fuse Block Bus Bar, Park/Neutral Position Switch, Underhood Fuse-Relay Center Bus Bar

BATT

M7-N7

50A Fuse

142

IP Fuse Block Bus Bar, Lock/Seats Circuit Breaker

LIGHTING

M8-N8

40A Fuse

42

Headlamp and Panel Dimmer Switch, IP Fuse Block Bus Bar

A/C CLUTCH

L4-K3

Diode-I

850-59(2)

A/C Enable Relay, A/C Compressor Clutch

UPFIT-ACCY

P7-R7

30A Fuse

--

Portable/Installed By Upfitter

UPFIT-BATT

P8-R8

30A Fuse

--

Portable/Installed by Upfitter

--

Stud "A"

30A Fuse

1842

Upfitter Ignition Power Stud

--

Stud "B"

30A Fuse

1742

Upfitter Battery Power Stud

Headlamps

A1-A3-B1-B2-B3

Micro Relay

1346

Headlamp Supply Voltage

Starter Enable Relay

A4-A6-B4-B5-B6

Mini Relay

6

Starter Solenoid Crank Voltage

A/C Relay (Rear)

A7-A9-B7-B8-B9

Mini Relay

1923

Auxiliary HVAC Switch Supply Voltage

Fuel Pump Relay

C1-C3-D1-D2-D3

Micro Relay

440

Battery Positive Voltage

A/C Enable Relay

C4-C6-D4-D5-D6

Micro Relay

59

A/C Compressor Clutch Supply Voltage

Upfitter/ Accessory

D7-D9-E7-E8-E9

Mini Relay

1839

Ignition 1 Voltage

Fuse Block - Underhood (Rear View)


Object Number: 559033  Size: MF

Cavity

Gauge/Color

Circuit

Description

A1

0.8 WHT

352

Headlamp Relay Coil Supply Voltage

A3

3.0 RED

42

Battery Positive Voltage

A4

0.5 BLK

850

Ground

A6

3.0 RED

242

Battery Positive Voltage

A7

0.8 BRN

141

Ignition 3 Voltage

A9

3.0 ORN

1040

Battery Positive Voltage

B1

3.0 LT BLU

1346

Headlamp Supply Voltage

B2

--

--

Not Used

B3

0.8 BLK

250

Ground

B4

3.0 PPL

6

Starter Solenoid Crank Voltage

B5

--

--

Not Used

B6

0.5 YEL

1737

Neutral Safety Switch - Park/Neutral Signal

B7

3.0 ORN

1923

Auxilary HVAC Switch Supply Voltage

B8

--

--

Not Used

B9

0.8 BLK

850

Ground

C1

0.5 DK GRN/WHT

465

Fuel Pump Relay Control

C3

2.0 GRY

120

Fuel Pump Supply Voltage

C4

0.5 DK GRN/WHT

459

A/C Compressor Clutch Relay Control

C6

0.8 ORN

1240

Battery Positive Voltage

D1

2.0 ORN

440

Battery Positive Voltage

D2

--

--

Not Used

D3

0.5 BLK

850

Ground

D4

0.8 DK GRN

59

A/C Compressor Clutch Supply Voltage

D5

--

--

Not Used

D6

0.5 PNK

639

Ignition 1 Voltage

D7

1.0 YEL

143

Accessory Voltage

D9

3.0 RED

1842

Battery Positive Voltage

E7

3.0 PNK

1839

Ignition 1 Voltage

E8

--

--

Not Used

E9

0.8 BLK

850

Ground

F1-G6

--

--

Not Used

G8

0.8 PNK

539

Ignition 1 Voltage

G10

3.0 ORN

1040

Battery Positive Voltage

G12

2.0 ORN

440

Battery Positive Voltage

H1-H3

--

--

Not Used

H5

3.0 LT BLU

1346

Headlamp Supply Voltage

H7

3.0 PNK

3

Ignition 1 Voltage

H9

3.0 RED

1

Battery Positive Voltage

H11

3.0 RED

1

Battery Positive Voltage

J2-J4

--

--

Not Used

J6

0.8 TAN/WHT

312

Right Headlamp Low Beam Supply Voltage

J8

0.5 PNK

639

Ignition 1 Voltage

J10

2.0 ORN

1540

Battery Positive Voltage

J12

0.8 ORN

740

Battery Positive Voltage

K1

--

--

Not Used

K3

0.8 DK GRN

59

A/C Compressor Clutch Solenoid Supply Voltage

K5-L2

--

--

Not Used

L4

0.8 BLK

850

Ground

L6

0.8 YEL

712

Left Headlamp Low Beam Supply Voltage

L8

0.8 PNK

439

Ignition 1 Voltage

L10

3.0 ORN

340

Battery Positive Voltage

L12

0.8 ORN

1240

Battery Positive Voltage

N1-N8

Bus Bar Feed to Attached Fuses

--

Not Used

M1

3.0 RED

1442

Battery Positive Voltage

M2

3.0 RED

742

Battery Positive Voltage

M3

--

--

Not Used

M4

5.0 RED

442

Battery Positive Voltage

M5

3.0 RED

342

Battery Positive Voltage

M6

3.0 RED

242

Battery Positive Voltage

M7

5.0 RED

142

Battery Positive Voltage

M8

3.0 RED

42

Battery Positive Voltage

P7-P8-R7-R8

30A Fused w/ Aftermarket Upfitter Provisions

--

Not Used

Convenience Center (Rear View)


Object Number: 299498  Size: MF

Connector Part Information

    • 12146452
    • Convenience Center

Pin

Wire Color

Circuit No.

Function

A

RED

1742

Battery Positive Voltage

B

PNK

1839

Ignition 1 Voltage

C1

GRY

8

Instrument Panel Lamp Supply Voltage - 1

C2

BLK

750

Ground

C3

ORN

1923

Auxiliary HVAC Switch Supply Voltage

C4

GRY/BLK

1596

Heater Water Control Solenoid Control

C6

RED

1742

Battery Positive Voltage

C7

ORN

540

Battery Positive Voltage

C8

BLK

750

Ground

C9

RED

1742

Battery Positive Voltage

D1

GRY

8

Instrument Panel Lamp Supply Voltage - 1

D2

PPL/WHT

1382

LED Dimming Signal

D3

ORN

140

Battery Positive Voltage

D4

BLK

1050

Ground

D5

LT GRN/BLK

735

Ambient Air Temperature Sensor Signal

D6

DK GRN/WHT

817

Vehicle Speed Signal

D7

ORN

1732

Courtesy Lamps Supply Voltage

D8

BLK

750

Ground

D9

ORN

640

Battery Positive Voltage

E1

BRN

441

Ignition 3 Voltage

E2

--

--

Not Used

E3

DK GRN/WHT

1133

Class 2 Serial Data (ATC)

E4

BLK

750

Ground

E5

ORN

1540

Battery Positive Voltage

E6

--

--

Not Used

F1

GRY

8

Instrument Panel Lamp Supply Voltage - 1

F2

BLK

750

Ground

F3

ORN

1923

Auxiliary HVAC Switch Supply Voltage

F5

LT BLU

195

Door Lock Control

F6

WHT

194

Door Unlock Control

G1

WHT

1080

Park Lamp Relay Control

G2

--

--

Not Used

G3

BRN

9

Park Lamp Supply Voltage

G4

ORN

740

Battery Positive Voltage

G5

--

--

Not Used

G6

DK GRN

29

Horn Control

G8

BLK

550

Ground

H1

ORN

240

Battery Positive Voltage

H3

ORN

240

Battery Positive Voltage

H4

ORN

740

Battery Positive Voltage

H6

BLK

28

Horn Relay Control

H7

PPL

16

Turn Signal Flasher Signal

H8

--

--

Not Used

H9

LT GRN

62

Hazard Indicator Supply Voltage

J1-K4

--

--

Not Used

Convenience Center (Front View)


Object Number: 607770  Size: LF
(1)Convenience Center C2 Not Used (Upfitter Battery)
(2)Convenience Center C3 (Power Seat)
(3)Convenience Center C4 (Trailer Harness)
(4)Convenience Center C6 (Vanity Mirror)
(5)Convenience Center C7 Not Used (Upfitter Rear Door Lock Power)
(6)Convenience Center C9 Not Used (Upfitter Power Feed)
(7)Convenience Center C11 Not Used (Upfitter Rear Door Lock Switch)
(8)Convenience Center C10 (Rear A/C)
(9)Convenience Center C8 (Active Transfer Case)
(10)Convenience Center C5 (Overhead Console)
(11)Convenience Center C1 (Rear Heater)