CAR SPEC SHEET

Chevrolet Silverado 2500HD/3500HD Fuse Box: What Each Fuse Does

From the 2026 Chevrolet Silverado 2500HD/3500HD owner's manual. 3 fuse boxes listed.

FuseCircuit
16–
17IECL 1
19DC/AC Inverter
20IECR 2 (LD)/EBCM2 (HD)
21–
22IECL 2
24Fuel Heater (DSL)
25EBCM 1 – Electronic Brake Control Module 1
26–
27Horn
28Parking Lamp Mirror/ Grill (LD)/Parking Lamp Left (HD)
29Parking Lamp Right (HD)
30ELM 3 – Electronic Lighting Module 3
31ELM 1 – Electronic Lighting Module 1
32–
33Not R/C
34Radars (LD)
37MISC IP Headliner Ignition
38Seat Fan Ignition
39Trailer Ignition Module
40Misc Ignition
41Trailer Parking Lamp
42Tail Lamp Left (HD)
44DEFC/ICCM Ignition (LD/HD)/FTZM Ignition (HD)
45Secondary Axle Motor
46Engine Control Module Ignition
47–
48–
49Transmission Auxiliary Oil Pump (LD)
50A/C Clutch
51Transfer Case Control Module
52Front Wiper
53Center High-Mounted Stop Lamp
54Tail Lamp Right (HD)
55Trailer Back-up Lamp
56DEFC BATT 1
57TTPM/SBZA
58Starter Motor (LD)
60Powertrain Sensor 2 (DSL)
61Active Hydraulic Steering (HD)
62DEFC Batt 1/CVS
63Trailer Brake
65–
66Cooling Fan Motor Left (LD)
67–
68DEFC Batt 2
69Starter Pinion (LD Gas)/ Starter Motor (HD)
71Cooling Fan Lower (LD)
72Cooling Fan Right (LD)
73Trailer Stop/Turn Lamp Left
74Trailer Interface Module 2
75Integrated Chassis Control Module
76ARB
78Engine Control Module
79Cabin Cool Pump 17W (LD)/Auxiliary Battery (HD)
80Powertrain Sensor 1 (DSL)
81Trailer Stop/Turn Lamp Right
82Trailer Interface Module 1
83FTZM 1
84Trailer Battery
85–
86Engine Control Module
87Injector B Even
88O2 B Sensor
89O2 A Sensor
90Injector A Odd
91Engine Control Module Throttle Control (HD)
92Cool Fan Clutch (HD DSL)/ Aeroshutter (LD/HD)
Relay 5Rear Window Defogger
Relay 18DC/AC Inverter
Relay 23Fuel Heater (DSL)
Relay 35Parking Lamp
Relay 36Run/Crank
Relay 43Secondary Axle Motor
Relay 59A/C Clutch
Relay 64Starter Motor (LD)/Cool Fan Clutch (HD DSL)
Relay 70Starter Pinion (LD Gas)/ Starter Motor (HD)
Relay 77Powertrain

Source: owner's manual, PDF pages 309, 310.

FuseCircuit
F1Rear Heated Seats Left/Right
F3–
F4–
F5–
F6Front Heated and Ventilated Seats
F8–
F9External Object Calculation Module/Park Assist
F10–
F11–
F12Memory Seat Module 2/ Passenger Power Seat
F13Export Power Take Off/ Special Equipment Option 1
F14DLC – Data Link Connector
F15–
F16AMP – Amplifier
F17Multi-Function End Gate
F18–
F20Tailgate Module
F22Rear Sliding Window
F23Driver Passenger Memory Seat Module 1/Memory Booster Module
F24–
F25–
F26–
F27–
CB1–
K1Rear Sliding Window Open
K2Rear sliding Window Close
K3MFEG Major HI – Multi-Function End Gate Major High
K4–
K5MFEG Minor – Multi-Function End Gate Minor
K6MFEG Major LO – Mult-Function End Gate Major Low
K7–
K8–

Source: owner's manual, PDF page 312.

FuseCircuit
F1Right Doors
F2Left Doors
F3–
F4ELM 2 – Electronic Lighting Module 2
F5ELM 7 – Electronic Lighting Module 7
F6Front Blower
F8LF Window Switch
F10Steering Tilt (LD)/UVM (HD)/ Electronic Lighting Module 5
F11VPM/OHC Camera
F12CGM/TCP/COL LCK/DMS (LD)
F14–
F17Steering Wheel Controls
F18–
F19–
F20–
F21–
F22Heated Steering Wheel
F23–
F24–
F25SPOT LAMP LT/RT (LD)
F26USB Ports/Special Equipment Option Retained Accessory Power
F27Accessory Power Outlet/ Retained Accessory Power
F28Accessory Power Outlet/Battery
F30SDM/ICS/IPC/HUD/HMDTY (HD)/HDLM (LD)
F31BCM 2 – Body Control Module 2
F32RFA WCM AUX JACK/CSM AUX JACK/TBCS
F33BCM 4 – Body Control Module 4
F34–
F40–
F41–
F42Electric Park Brake Switch
F43–
F44Shifter Interface Board (LD)
F45Radio Lo
F46–
F47–
F48Transmission Control Module
F49Body Control Module 1
F50–
F51Battery 1 (HD)
F52Battery 2 (HD)
F53–
F54Sunroof
F55Driver Power Seat
F56DC DC TRANS 1 (LD)
F57DC DC TRANS 2 (LD)
F58–
CB 1Accessory Power Outlet 1
CB 2–
CB 3–
CB 4–
K1–
K2Retained Accessory Power/ Accessory 1
K4–
K5–

Source: owner's manual, PDF pages 314, 315.

Listings are copied as text from the manual's fuse tables (AI-assisted; every circuit name was matched against the cited pages 2026-10-18). Fuse layouts can differ by trim and year; check the label on the fuse box cover before replacing a fuse, and always use the same amp rating.

Confirm with your own manual, dipstick or door-jamb label.
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