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J-Case Fuses Usage
17 Trailer Turn Signal, Stoplamps
32 Trailer
33 Anti-lock Brake System
34 Ignition A
35 Blower Motor
36 Driver’s Side Headlamp
62 Passenger’s Side Headlamp
65Vehicle Stability Enhancement
System (StabiliTrak
®)
Relays Usage
37 Headlamp Washer
38 Rear Wiper
39 Fog Lamps
40 Horn
41 Fuel Pump
42 Windshield Washer
Relays Usage
43 High-Beam Headlamp
44 Air Conditioning
45 Cooling Fan
46 Headlamp Driver Module
47 Starter
49 Electric Adjustable Pedals
60 Powertrain
63 Low-Beam Headlamp
64 Ignition 1
Misc. Usage
48 Instrument Panel Battery
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Rear Underseat Fuse Block
The rear underseat fuse block is located on the
driver’s side of the vehicle, under the second row
seat. Pull the seat cushion forward to access
the fuse block.
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Fuses Usage
01 Passenger Door Control Module
02 Driver Door Control Module
03 Liftgate Module 2
04 Truck Body Controller 3
05 Blank
06 Blank
07 Truck Body Controller 2
08 Power Seats
09 Rear Wiper
10 Driver Door Module
11 Ampli er
12 Passenger Door Module
13 Blank
14 Driver Side Rear Parking LampsFuses Usage
15 Blank
16Vehicle Center High-Mounted
Stoplamp (CHMSL)
17Passenger Side Rear Parking
Lamps
18 Locks
19 Liftgate Module/Driver Seat Module
20 Blank
21 Locks
23 Blank
24 Unlock
25 Ignition 0
26 Overhead Battery/OnStar
®System
27 Rainsense™ Wipers
28 Sunroof
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Fuses Usage
29 Accessory
30 Parking Lamps
31 Truck Body Controller Accessory
32 Truck Body Controller 5
33 Front Wipers
34 Ignition 3
35 Vehicle Stop
36 Transmission Control Module
37 Heat Ventilation Air Conditioning B
38 Front Parking Lamps
39 Rear Left Turn Signal
40 Heat, Ventilation, Air Conditioning 1
41 Front Right Turn SignalFuses Usage
42 Radio
43 Trailer Park
44 Rear Right Turn Signal
45 Blank
46 Auxiliary Power 1
47 Blank
48 Ignition 0
49 Not Used
50 Blank
51 Front Left Turn Signal
52 Brakes
53 Truck Body Controller 4
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