Chevrolet Blazer 2019 Fuse Replacement

Having an electrical issue? It could be a blown fuse — an easy fix you can do yourself.

Follow the steps below to find and replace the fuse:

Step 1: Find the Fuse Box

In your Chevrolet Blazer 2019, the interior fuse box is typically located under the dashboard on the driver's side. Some vehicles also have an additional fuse box in the engine compartment. Check your owner's manual or the fuse box cover for the exact location.

Step 2: Identify the Corresponding Fuse

Below is the complete fuse list for your vehicle. Find the circuit that isn't working and note the fuse number and amperage.

Instrument Panel Fuse Box

Fuse #FunctionAmperage
F1Body control module 6
F2Diagnostic link/ Central gateway module
F3Electric steering column lock
F4Not Used
F5Not Used
F6Heating, ventilation, and air conditioning
F7Body control module 3
F8Not Used
F9Right front heated seat
F10Airbag/Seatbelt
F11Not Used
F12Amplifier/Noise control module
F13Body control module 7
F14Left front heated seat
F15Not Used
F16Sunroof
F17Not Used
F18Instrument panel cluster
F19Body control module 1
F20Rear seat entertainment
F21Body control module 4
F22Infotainment USB data/Aux jack
F23Body control module 2
F24USB charger/ Wireless charging
F25Park assist
F26CIM ( Communications integration module)
F27Not Used
F28Heating, ventilation, and air conditioning/ Information communication system display
F29Radio
F30Steering wheel adjustment controls
F31Spare2019
F32DC AC inverter
F33Driver power seat
F34Passenger power seat
F35Battery IEC 1 feed
F36Electric power steering
F37Rear seat entertainment/USB charge/Wireless charging module/ Auxiliary power outlet/Lighter
F38Body control module 8
F39Not Used
F40CBNot Used
F41CBNot Used
F42CBAuxiliary power outlet/Lighter

Engine Compartment Fuse Box

Fuse #FunctionAmperage
F1Antilock brake system pump
F2Starter 1
F3DC DC transformer 1
F4Not Used
F5DC DC transformer 2
F6Not Used
F7Spare2019
F8Starter 3
F9Not Used
F10Not Used
F11Not Used
F12Front wiper
F13Spare2020
F14Not Used
F15Rear wiper
F16Not Used
F17Not Used
F18Not Used
F19Not Used
F20Not Used
F21Not Used
F22Electronic brake control module
F23Parking/Trailer lamps
F24Right trailer stoplamp/Turnlamp
F25Spare2019
F26Not Used
F27Left trailer stoplamp/Turnlamp
F28Not Used
F29Not Used
F30Washer pump
F31Spare2019
F32Left low-beam headlamp
F33Spare2019
F34Horn
F35Not Used
F36Spare2019
F37Spare/Right high-beam headlamp
F38Spare2019
F39Transmission control module
F40Left rear bus electrical center/DC DC ignition
F41Instrument cluster
F42Heating, ventilation, and air conditioning/ Central gateway module run/crank
F43Reflective light alert display
F44Electronic brake control module/ Electric brake booster/Run/crank
F45Not Used
F46Not Used
F47Not Used
F48Not Used
F49Interior rearview mirror
F50Fuel system control module/Fuel tank zone module run/ crank
F51Heated steering wheel
F52Air conditioning clutch
F53Spare2022
F54Spare2019
F55Not Used
F56Not Used
F57Engine control module/lgnition
F58Transmission control module/ Ignition
F59Engine control module battery
F60Not Used
F61O2 sensor 1/ Aeroshutter/Mass air flow sensor
F62Engine control module-odd
F63O2 sensor 2
F64Engine control module-even
F65Engine control module powertrain 1
F66Engine control module powertrain 2
F67Engine control module powertrain 3
F68Not Used
F69Not Used
F70Not Used
F71Not Used
F72Not Used
F73Not Used
F74Not Used
F75Not Used
F76Not Used
F77Not Used
RelaysSpare
K1Starter 1
K2Run/Crank
K3Starter 3
K4Not Used
K5Not Used
K6Spare2019
K7Engine control module
K8Air conditioning
K9Not Used
K10Spare2019

Rear Compartment Fuse Box

Fuse #FunctionAmperage
F1Not Used
F2Trailer battery
F3Not Used
F4Rear blower
F5Rear drive control 1
F6Not Used
F7Right window
F8Rear window defogger
F9Left window
F10Not Used
F11Trailer reverse
F12Not Used
F13Not Used
F14Not Used
F15Not Used
F16Not Used
F17Not Used
F18Not Used
F19Not Used
F20Glove box door/ Trailer stoplamp
F21Not Used
F22Not Used
F23Not Used
F24Not Used
F25Not Used
F26Trailer brake
F27Driver ventilated seat/Lumbar
F28Passive entry/ Passive start
F29Not Used
F30Canister vent
F31Not Used
F32Heated mirrors
F33Not Used
F34Liftgate module
F35Fuel system control module/Fuel tank zone module
F36Passenger ventilated seat/ Lumbar
F37Not Used
F38Window module
F39Rear closure
F40Memory seat module
F41Automatic occupancy sensor
F42Not Used
F43Not Used
F44Not Used
F45Liftgate motor
F46Rear heated seats
F47Not Used
F48Not Used
F49Not Used
F50Not Used
F51Not Used
F52Rear drive control 2/ Semi-active dampening system module
F53Video
F54External object calculating/Side blind zone alert
F55Not Used
F56Universal remote/ Rain sensor
F57Alarm overhead console/Theft deterrent
CB1Not Used
CB2Not Used
CB3Rear auxiliary power outlet
K1Not Used

Step 3: Check the Fuse

Use the plastic fuse puller, typically found in the fuse box, to remove the fuse. Hold it up to a light source. If the metal filament inside is broken or charred, the fuse is bad and needs to be replaced.

Comparison of a good fuse and a blown fuse — the blown fuse has a broken filament

Step 4: How to Get a Replacement

You can buy a replacement fuse at any auto parts store. Make sure you match the **amperage (A)** and **physical size** of the fuse exactly. For example, if you need a 20A fuse, get a 20A fuse.

Step 5: Replace the Fuse

Gently press the new fuse into the empty slot. You should feel a slight click when it's securely in place. Test the affected circuit to confirm it's working again.

What Now?

Fuse Was Blown — What to Buy

Ask at any auto parts store (AutoZone, O'Reilly, Advance Auto) for a blade fuse with the same amperage printed on the old one (e.g., 10A, 15A, 20A). Also match the physical size — mini (most modern cars), standard, or maxi. Replacement fuses cost under $5 and most stores sell assorted packs.

Fuse Looks Fine — Other Causes

If the fuse is intact, the problem isn't a blown fuse. Common alternatives include a bad relay (a click-sized electrical switch), a faulty wiring connection, or a failed component (motor, switch, module). At this point, a mechanic's diagnostic is the most reliable next step.

Frequently Asked Questions

What happens if I put in the wrong amperage fuse?

Higher amperage fuses won't protect the circuit and can cause wiring damage or fire. Lower amperage fuses will blow again immediately. Always match the exact amperage.

Why does my fuse keep blowing?

A repeatedly blown fuse indicates an underlying short circuit or overload. Replacing it again won't fix the root cause — consult a mechanic.

Do I need any tools?

Most cars come with a plastic fuse puller in the fuse box lid. If not, fine-tip needle-nose pliers work. A small flashlight helps.

How do I know what size fuse to buy?

Match the amperage printed on the old fuse (e.g., 10A, 15A, 20A) and the physical blade size (mini, standard, maxi). Auto parts stores carry assorted packs.