2019 GMC Sierra 1500 Fuse Box Diagram & Amperage Guide
A complete guide to finding, testing, and replacing fuses on your 2019 GMC Sierra 1500.
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
Working on this 2019 GMC Sierra 1500? Run just this one job through Repairius.
No big switch. Write the estimate, text it for approval, and get paid on your phone. Keep everything else the way it is.
14-day free trial · credit card required · cancel anytime
As an ASE-certified master technician, I’ve tracked down countless electrical gremlins on the GM T1XX platform. When your 2019 GMC Sierra 1500 (Next Generation) experiences a sudden electrical failure—whether it's a dead infotainment screen, a trailer brake fault, or a blower motor that won't kick on—the first and easiest step is checking the fuses.
Understanding your truck's fuse box layout saves time, money, and frustration. Here is the comprehensive guide to the fuse box locations, diagrams, and amperages for the 2019 GMC Sierra 1500.
Quick answer: Fuse Box Locations
The 2019 GMC Sierra 1500 features three primary fuse box locations to handle its extensive electrical systems:
- Engine Compartment Fuse Block: Located under the hood on the driver’s side, near the battery.
- Left Instrument Panel Fuse Block: Located behind the driver’s side dashboard end cover (kick-panel area).
- Right Instrument Panel Fuse Block: Located behind the passenger’s side dashboard end cover.
Note: There is no trunk/cargo fuse box on this pickup truck platform, though some trailering modules are mounted near the rear chassis.
Engine Compartment Fuse Block
The under-hood fuse box houses the heavy-duty relays and high-amperage fuses that protect vital powertrain, ABS, and exterior lighting components. To access it, open the hood and remove the black plastic cover on the driver's side.
Disclaimer: Fuse configurations vary greatly based on engine (2.7L, 5.3L, 6.2L, 3.0L Diesel) and trim level. Always verify with the printed legend inside your fuse box lid.
| Fuse / Relay # | Amp Rating | Color Code | Circuit / Component Protected |
|---|---|---|---|
| F05 | 40A | Green (J-Case) | Starter Motor |
| F09 | 30A | Pink (J-Case) | ABS Pump / Valves |
| F14 | 20A | Yellow | Trailer Brake Control Module |
| F17 | 15A | Blue | ECM / PCM (Engine Control) |
| F21 | 20A / 30A | Yellow/Green | Fuel Pump Power Module |
| F24 | 10A | Red | A/C Clutch / Compressor |
| F27 | 15A | Blue | Ignition Coils / Injectors (Odd) |
| F28 | 15A | Blue | Ignition Coils / Injectors (Even) |
| F34 | 40A | Green (J-Case) | Front Blower Motor |
| F41 | 10A | Red | Headlights Low / High Beam (Left) |
| F42 | 10A | Red | Headlights Low / High Beam (Right) |
| F51 | 15A | Blue | Tail / Park / Running Lights |
| R01 (Relay) | - | Black | Starter Relay |
| R04 (Relay) | - | Black | A/C Clutch Relay |
| R07 (Relay) | - | Black | Engine Control (Powertrain) Relay |
Left Instrument Panel Fuse Block
To access this box, open the driver’s door and use a plastic trim tool to pry off the end cap of the dashboard. This block primarily handles interior accessories, driver controls, and body control functions.
| Fuse # | Amp Rating | Color Code | Circuit / Component Protected |
|---|---|---|---|
| F03 | 10A | Red | Airbag System (SIR) / Sensing Module |
| F06 | 15A | Blue | Radio / Infotainment System |
| F11 | 20A | Yellow | Accessory Power Outlet (Cigar/12V Front) |
| F18 | 10A | Red | Brake Switch / Stop Lights |
| F22 | 15A | Blue | Instrument Cluster / Dashboard Display |
| F29 | 20A | Yellow | Power Windows (Driver) |
| F31 | 10A | Red | Steering Wheel Controls |
Right Instrument Panel Fuse Block
Open the passenger door and pop off the side dashboard cover to find the right-side fuse block. This box shares interior body duties, typically focusing on passenger-side accessories and auxiliary power.
| Fuse # | Amp Rating | Color Code | Circuit / Component Protected |
|---|---|---|---|
| F05 | 20A | Yellow | Accessory Power Outlet (Center Console/Rear) |
| F14 | 15A | Blue | Body Control Module (BCM) 1 |
| F19 | 20A | Yellow | Power Windows (Passenger) |
| F24 | 10A | Red | HVAC Control Module (Cabin Temp Controls) |
| F33 | 30A | Green | Power Seats / Lumbar Motors |
How to test a fuse
Replacing parts blindly is a rookie mistake. Here is how to test a fuse properly:
- Visual Inspection: Pull the fuse using the plastic puller provided in the fuse box. Hold it up to a light source. If the metal "U" or "S" shaped wire inside is broken or charred, the fuse is blown.
- Use a Test Light (Recommended): You don't even need to pull the fuse! Turn the ignition to the "ON" position. Ground the clip of a 12V test light to bare metal. Touch the probe to the two small exposed metal test points on the top of the fuse. If the test light illuminates on both sides, the fuse is good. If it lights up on one side but not the other, the fuse is blown.
- Use a Multimeter: Set your multimeter to continuity (the beep setting). Touch the probes to the test points on top of the fuse. A beep means the fuse is intact; silence means it is blown.
Common blown fuses on this vehicle
Based on my time in the shop, here are the most common fuses that blow on the 2019 GMC Sierra 1500:
- 12V Accessory Outlets (F11 Left Dash / F05 Right Dash): The cigarette lighter or auxiliary power ports frequently blow when users plug in faulty phone chargers, high-draw tire inflators, or power inverters. If your ports are dead, check these 20A yellow fuses first.
- Trailer Lights / Trailer Brake (F14 Under-hood): The trailer wiring on these trucks takes a beating from the elements. If you hook up to an old trailer with a short in its wiring harness, your truck's protective fuses will pop immediately to save the BCM. Always inspect the trailer plug for corrosion or crossed wires before replacing the fuse.
- Fuel Pump Module (F21 Under-hood): If the truck cranks strong but refuses to start, check the fuel pump fuse. A failing fuel pump can draw excess amperage as it dies, popping the fuse.
- Blower Motor (F34 Under-hood): If you lose all cabin AC/Heat airflow, check this 40A J-case fuse. If it’s blown, inspect the cabin air filter—a clogged filter makes the blower motor work too hard, over-drawing current.
Friendly reminder: Never replace a blown fuse with one of a higher amp rating. Doing so removes the failsafe and can easily cause melted wiring or an electrical fire. Always verify your specific truck's diagram via the owner's manual or the fuse box lid.
If you keep blowing the same fuse, you have a dead short to ground or a failing component that needs professional diagnosis. Find a trusted shop on Repairius.
Before you pull a fuse on the 2019 GMC Sierra 1500
- Use the label printed on the panel cover or the owner's manual for your exact build. Layouts change with options, model year and build date, so a chart for another truck can be wrong.
- Replace a blown fuse only with the same amp rating. A larger fuse can let wiring overheat.
- A fuse that blows again right away means a short or failing component downstream. Find the cause before replacing it again.
- A good fuse doesn't prove the circuit works — relays, grounds and connectors fail too.
- Disconnect the battery before working near high-current fuses or cables.
Learn more: How fuses, relays and truck electrical systems work
More specs for the 2019 GMC Sierra 1500
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2019 GMC Sierra 1500 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
Browse by make
Running an auto or diesel repair shop?
Compare Repairius to the shop software you're paying for
$99.99/month (first location included), unlimited users, 14-day free trial.