Silverado Fuse Box Diagram: Year and Fuse Location 1999-2026
The correct Silverado fuse box diagram depends on the truck’s model year, whether it is a Silverado 1500 or HD, and which fuse block you are checking. Chevrolet changed fuse locations, numbering, relays, and circuit assignments several times between 1999 and 2026.
Most Silverado trucks have an engine-compartment fuse block plus at least one instrument-panel block. Some generations use left and right dash blocks, while older trucks can also have a center utility block.
Use the year groups below to identify the correct layout before pulling or replacing a fuse.
Silverado Fuse Box Diagram Quick Guide 1999 to 2026
Match your Silverado year and truck class before using any fuse number. Fuse locations and assignments can change between generations, Silverado 1500, and HD models.
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Underhood block, driver-side dash panel, and a center utility block on many trucks.
Underhood fuse block plus driver-side instrument-panel electrical center.
Underhood block with separate left and right instrument-panel fuse locations.
Multiple fuse-block views. Some right-side dash fuses sit on the rear of the assembly.
Use HD-specific diagrams. Do not assume the Silverado 1500 layout matches.
Four Fuse Block Locations You May Find
Starter, fuel, lighting, ABS, trailer, cooling, and powertrain circuits.
Common cabin, BCM, accessory, lighting, and control-module circuits.
Used on later generations for radio, outlets, blower, door, and accessory circuits.
Found on applicable older trucks for trailer, body, seat, and accessory connections.
| Year | Circuit | Verified Fuse or Relay | Location |
|---|---|---|---|
| 2006 | Cigarette Lighter | CIG LTR | Underhood block |
| 2013 | Fuel Pump | Fuse 20 | Underhood block |
| 2013 | Starter | J-Case Fuse 62 | Underhood block |
| 2018 | Radio | Fuse 18 | Right dash block |
| 2018 | Fuel Pump | Fuse 18 and Relay 59 | Underhood block |
| 2021 | Trailer Brake | Fuse 84 | Underhood block |
Never assume a fuse number from another Silverado year applies to your truck. Confirm the model year, 1500 versus HD, engine, fuse-block location, circuit label, and factory-specified amperage before replacement.
Which Silverado Fuse Diagram Matches Your Year
Chevrolet Silverado fuse layouts follow the truck’s electrical generation rather than one universal design.
| Model Year | Main Generation | Typical Fuse Block Arrangement |
|---|---|---|
| 1999 to 2006 | GMT800 | Underhood, driver-side dash, center utility block on many trucks |
| 2007 to 2013 | GMT900 | Underhood and driver-side instrument-panel blocks |
| 2014 to 2018 | K2XX | Underhood plus left and right instrument-panel blocks |
| 2019 to 2021 | T1 Silverado 1500 | Underhood plus left and right dash blocks |
| 2022 Silverado 1500 LTD | Previous-generation carryover | Verify manual before using 2022 refreshed layout |
| 2022 to 2026 | Refreshed Silverado 1500 | Multiple fuse-block configurations by equipment |
| 2020 to 2026 | Silverado 2500HD and 3500HD | Separate HD underhood plus left and right dash blocks |
The model year alone is not always enough. GM’s parts catalog lists different battery-distribution fuse-block variants across later Silverado 1500 and HD trucks, including separate configurations covering 2019 to 2026.
For a crossover year such as 2022, identify whether the truck is a Silverado 1500 LTD or the refreshed Silverado 1500 before using a diagram.
Where Are Silverado Fuse Boxes Located
Silverado trucks can have several electrical centers. Always match the physical block to the diagram before reading a fuse number.
Engine Compartment Fuse Block
The main underhood block contains high-current engine, starter, fuel, lighting, ABS, cooling, trailer, and powertrain circuits.
Location varies by generation. On a 2006 Silverado, Chevrolet places the underhood fuse block on the driver’s side near the battery.
On the newer architecture documented for 2020, Chevrolet specifies the underhood block on the passenger side for the 1500 and the driver side for 2500 and 3500 models.
Driver Side Instrument Panel
Older Silverado trucks commonly place the cabin fuse block behind a cover at the driver-side edge of the dashboard.
Chevrolet documents this location on both the 2006 and 2013 Silverado. The cover pulls away to expose the fuses.
Passenger Side Instrument Panel
Later Silverado generations can also use a passenger-side fuse block.
The 2018 Silverado has a fuse-block access door at the passenger-side edge of the instrument panel. The 2020 and 2021 trucks use a similar right-side block, including access to fuses on the rear of the assembly.
Center Instrument Panel Block
GMT800 trucks can have another electrical utility block below the dashboard.
On the 2006 Silverado, Chevrolet places the center utility block underneath the instrument panel, to the left of the steering column. It includes connections for trailer-brake wiring, body wiring, seat circuits, and other equipment.
1999 to 2006 Silverado Fuse Box Diagram
The GMT800 Silverado uses labeled fuse and relay names instead of relying entirely on numbered fuse positions.
For late GMT800 trucks such as the 2006 Silverado, three areas matter most:
- Driver-side instrument-panel fuse block
- Center instrument-panel utility block
- Driver-side underhood fuse and relay block
2006 Silverado Common Fuse Labels
| Fuse or Relay Label | Circuit |
|---|---|
| CIG LTR | Cigarette lighter |
| F/PMP | Fuel pump relay |
| HORN | Horn |
| IGN E | Cluster, A/C relay, turn and hazard circuits, starter relay feed |
| TRL B/U | Trailer backup lamps |
| STUD 2 | Accessory power and trailer brake feed |
| BLWR | Front HVAC blower |
| DRL | Daytime running lamps |
Chevrolet identifies CIG LTR as the cigarette-lighter circuit and F/PMP as the fuel-pump relay in the 2006 underhood layout.
Engine choice also matters. Chevrolet assigns several underhood positions differently between gasoline and diesel trucks. Some positions that feed fuel-injection or oxygen-sensor circuits on gasoline engines serve the Engine Control Module, actuator, or fuel-heater circuits on diesel models.
Do not assume a 2006 fuse label automatically applies to every 1999 to 2005 truck. Match the diagram printed inside the fuse cover or the Chevrolet manual for the exact year.
2007 to 2013 Silverado Fuse Box Diagram
GMT900 trucks moved to numbered fuse positions and a different electrical-center layout.
The driver-side instrument-panel fuse block sits behind the left edge of the dashboard. The engine-compartment block handles most engine, starter, trailer, lighting, and high-current circuits.
2013 Silverado Common Fuse Numbers
| Fuse | Circuit |
|---|---|
| 16 interior | Accessory power outlets |
| 20 underhood | Fuel pump |
| 25 underhood | Trailer parking lamps |
| 29 underhood | Horn |
| 53 underhood | Accessory power outlet |
| 56 underhood | ECM and secondary fuel pump ignition |
| 62 J-case | Starter |
| 63 J-case | Trailer brakes |
Chevrolet’s 2013 manual identifies fuse 20 as the fuel-pump fuse, fuse 29 as the horn circuit, fuse 53 as an accessory-power-outlet circuit, and J-case fuse 62 as the starter circuit. J-case position 63 supplies the trailer-brake feed.
The cabin panel also uses fuse 16 for accessory power outlets. This distinction matters if one outlet is dead while another electrical system still works.
2014 to 2018 Silverado Fuse Box Diagram
The K2XX Silverado uses a more distributed electrical layout.
Expect to find:
- Engine-compartment fuse block
- Left instrument-panel fuse block
- Right instrument-panel fuse block
- Additional equipment-dependent positions
This means a fuse numbered 18 in one block is not the same circuit as fuse 18 in another block.
2018 Silverado Common Fuse Numbers
| Block | Fuse or Relay | Circuit |
|---|---|---|
| Underhood | 18 | Fuel pump |
| Underhood | 21 | Fuel pump power module |
| Underhood | 24 | Front wiper |
| Underhood | 48 | Horn |
| Underhood | Relay 59 | Fuel pump |
| Underhood | Relay 68 | Starter |
| Right dash | 1 | Accessory power outlet 3 |
| Right dash | 2 | Accessory power outlet 4 |
| Right dash | 18 | Radio |
| Right dash | 43 | Front blower |
The official 2018 diagram identifies underhood fuse 18 as the fuel-pump circuit and relay 68 as the starter relay. Fuse 48 supplies the horn.
Inside the passenger-side panel, fuse 18 supplies the radio while fuses 1 and 2 serve accessory power outlets.
Chevrolet also states that a truck may not contain every fuse, relay, or feature shown in the diagram. Equipment level and configuration can therefore leave some numbered slots unused.
2019 to 2026 Silverado 1500 Fuse Box Diagram
The T1 Silverado 1500 uses three major fuse areas on many configurations:
- Engine-compartment fuse block
- Left instrument-panel fuse block
- Right instrument-panel fuse block
The right block can include fuses on both the front and rear of the assembly. Chevrolet instructs owners to release the upper tab and pull the top of the block outward when rear access is required.
2020 and 2021 Silverado Common Circuits
| Location | Fuse or Breaker | Circuit |
|---|---|---|
| Underhood | 27 | Horn |
| Underhood | 41 | Trailer parking lamp |
| Underhood | 45 | Second fuel pump |
| Underhood | 52 | Front wiper |
| Underhood | 58 | Starter motor on applicable configurations |
| Underhood | 63 | Trailer battery |
| Underhood | 69 | Starter pinion on light-duty trucks |
| Underhood | 84 on 2021 | Trailer brake |
| Left dash | F27 | Accessory power outlet and retained accessory power |
| Left dash | F28 | Accessory power outlet and battery |
| Left dash | F41 | Infotainment 1 |
| Left dash | F58 | Infotainment 2 |
| Left dash | CB2 | Accessory power outlet 1 and cigarette lighter |
The 2020 manual identifies underhood starter, trailer, fuel-pump, wiper, and lighting positions separately. For example, fuse 58 supplies the starter motor on applicable light-duty and diesel configurations, while fuse 69 serves the starter pinion on light-duty trucks.
The 2021 documentation identifies fuse 84 as the trailer-brake circuit and fuse 69 as the light-duty starter-pinion circuit.
For cabin accessories, the 2021 left instrument-panel block uses F41 and F58 for infotainment circuits. Accessory outlets are supplied through F27, F28, and dedicated circuit breakers depending on outlet position.
Do not apply these 2020 or 2021 numbers blindly to a 2022 to 2026 Silverado. GM lists different underhood electrical-center variants for later Silverado 1500 trucks, so the fuse-cover label and model-year manual remain the final reference.
Silverado 2500HD and 3500HD Fuse Diagram Differences
A Silverado 2500HD or 3500HD should not automatically use the same diagram as a Silverado 1500 from the same year.
Chevrolet’s 2022 HD manual lists three primary electrical centers:
- Engine-compartment fuse block
- Left instrument-panel fuse block
- Right instrument-panel fuse block
GM’s parts catalog also lists HD-specific fuse blocks through the 2026 model year. One battery-distribution electrical-center configuration covers 2500HD and 3500HD trucks from 2020 through 2026.
Duramax Fuse Differences
Trucks equipped with the 6.6L Duramax V8 Turbo Diesel can have diesel-specific circuits that differ from gasoline HD trucks.
Chevrolet directs diesel owners to the Duramax diesel supplement when the standard manual does not contain the required engine-specific information.
Check the engine type before using an HD engine-compartment diagram, particularly for starter, glow-plug, fuel-heater, Engine Control Module, and aftertreatment-related circuits.
Which Fuse Controls Common Silverado Electrical Problems
Use the failed component to identify the circuit, then find its fuse number in the correct year-specific diagram.
| Problem | Circuit to Check | Example Verified Assignment |
|---|---|---|
| Radio dead | Radio or infotainment | 2018 right dash fuse 18 |
| 12V outlet dead | Accessory power | 2013 interior fuse 16 |
| Cigarette lighter dead | CIG LTR or outlet breaker | 2006 CIG LTR |
| Engine will not crank | Starter fuse or relay | 2013 fuse 62, 2018 relay 68 |
| Fuel pump not running | Fuel-pump fuse and relay | 2013 fuse 20, 2018 fuse 18 |
| Horn not working | Horn fuse or relay | 2013 fuse 29, 2018 fuse 48 |
| Trailer brake fault | Trailer-brake feed | 2013 J-case 63, 2021 fuse 84 |
| Front wipers dead | Wiper circuit | 2018 fuse 24, 2020 fuse 52 |
| Trailer running lamps dead | Trailer parking lamp | 2020 fuse 41 |
| 4WD electrical fault | Transfer-case control circuit | Verify exact year and block |
A SERVICE TRAILER BRAKE SYSTEM warning can involve more than a blown fuse. If the fuse is intact, use the dedicated Service Trailer Brake System troubleshooting guide before replacing trailer-brake components.
A fuse number that matches one year can control something completely different on another Silverado. Always confirm the printed circuit description.
How to Check a Silverado Fuse Safely
A fuse can look intact and still have an electrical fault, so use a simple verification process.
- Turn off the ignition and the affected accessory.
- Find the correct fuse block using the year-specific layout.
- Read the fuse label and amperage before removing it.
- Use the fuse puller where provided.
- Inspect the metal element through the fuse body.
- Confirm continuity with a multimeter if the break is unclear.
- Install the same fuse type and amperage rating.
- Test the circuit again.
Chevrolet warns not to exceed the specified fuse or circuit-breaker amperage. An oversized fuse can allow wiring to overheat and create a fire hazard.
If the replacement fuse immediately blows again, stop replacing fuses and diagnose the circuit.
What If the Silverado Fuse Keeps Blowing
A fuse that repeatedly opens is normally protecting the circuit from excessive current.
Common causes include damaged wiring, trailer-harness shorts, water intrusion, a failed electric motor, pinched accessory wiring, or an aftermarket device connected to the wrong circuit.
Ground faults and corroded connections can also create confusing electrical symptoms. Truck Guider’s Chevy truck ground locations guide shows the common grounding areas to inspect when several unrelated electrical systems fail together.
Do not install a larger fuse to stop repeated failures. The correct repair is finding the short, overloaded component, or damaged wiring that caused the original fuse to open.
How to Choose the Correct Silverado Fuse Diagram
Use four identifiers before trusting any Silverado fuse diagram:
- Model year: Confirm the exact year.
- Truck class: Identify Silverado 1500, 2500HD, or 3500HD.
- Engine: Check gas versus 6.6L Duramax V8 Turbo Diesel where relevant.
- Fuse-block location: Confirm underhood, left dash, right dash, or center block.
Then compare the circuit label and amperage with the diagram printed on the fuse-block cover or Chevrolet owner manual.
Chevrolet provides downloadable owner manuals by year, make, and model through its current support portal.
That final verification matters more than finding a diagram that simply looks similar.
5 Common Silverado Fuse Box Questions
Where Is the Fuse Box on a Chevy Silverado?
Most Silverado trucks have an underhood fuse block and at least one interior fuse block. Older models commonly use a driver-side dash block, while newer generations can have both left and right instrument-panel blocks.
Where Is the Silverado Radio Fuse?
The radio fuse changes by model year. On a 2018 Silverado, the passenger-side instrument-panel block uses fuse 18 for the radio, while newer T1 trucks split infotainment power across multiple circuits.
Which Fuse Controls the Silverado Cigarette Lighter?
On a 2006 Silverado, Chevrolet labels the cigarette-lighter circuit CIG LTR. Newer trucks often describe the same type of circuit as an accessory power outlet and may protect it with a fuse or circuit breaker.
Where Is the Silverado Fuel Pump Fuse?
It depends on the model year. For example, the 2013 Silverado uses underhood fuse 20 for the fuel pump, while the 2018 truck uses fuse 18 and also has a fuel-pump relay.
Can I Use a Higher Amp Fuse in My Silverado?
No. Replace the blown fuse with the specified type and amperage only. Chevrolet warns that installing an oversized fuse or circuit breaker can overheat the electrical system and create a fire risk.
Use the Fuse Number Only After Verifying Your Silverado
A Silverado fuse box diagram is useful only when it matches the exact truck. A 2013, 2018, and 2021 Silverado can use completely different fuse numbers for the same starter, fuel-pump, radio, or trailer circuit.
Start with the year and truck class, locate the correct physical fuse block, then verify the circuit name and amperage against Chevrolet documentation. If a new fuse blows again, diagnose the wiring or connected component instead of increasing the fuse rating.
