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Chevrolet and GMC Truck Information: Silervado, Sierra, and Colorado

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1999-2006 Chevy Silverado & Sierra Fuse Box Diagram

August 20, 2020 by Jake Mayock 14 Comments

The fuses are the heart of your Chevy’s electrical system. Nearly every system in a car that requires battery or electric power (windows, door locks, lighting, stereo, etc. etc.) is wired and powered through a fuse. The battery sends power to the fuse which then transfers it to the specific system on the car. The purpose of a fuse is to prevent the battery from directly overloading and melting a systems wiring.

When a fuse becomes overloaded, or is carrying too many amps of power for its capacity, the fuse breaks. When a fuse breaks, it cuts off the power supply to that specific system. So when you experience an electrical-related failure in your car, the fuses are the first place you should look.

Fuses are extremely important as they protect all of our electrical components. If your battery ran its power directly to your stereo instead of through a fuse first, if the battery accidentally overloaded the stereo it would break everything. And then you’d need to spend a few thousand dollars replacing your full stereo system instead of $0.50 replacing the fuse.

Types of Chevy & GMC Fuses

Fuses come in different colors and different sizes. The color and size of the fuse depict the amount of power (in amps) the fuse is capable of supplying. Stereo systems require a lot of electrical power, so they will usually have a bigger and more powerful fuse than say the power windows.

The amp rating is usually marked right on the top of the fuse. However, coloring can also help you identify its amp rating. You need to be careful to use the correct fuse when replacing a bad one. While some of the different sizes will not fit into the fuse box, ie. a 5amp fuse will not fit in a 40amp fuse slot, there are a lot of different amperage fuses that will fit in the same fuse slots. Using a higher powered fuse than necessary usually won’t be a problem, but if you accidentally put a 10amp fuse where a 30amp fuse should be, you’re going to blow the fuse extremely quickly.

See these two below exhibits to help identify fuses:

Chevy Silverado Fuse Colors

Chevy Silverado Fuse Types

Where is my Chevy Silverado Fuse Box Located?

Silverado’s and Sierra’s, and pretty much most vehicles, will all have two fuse boxes. One will be located inside of the engine bay, and the second will be located in the driver side footwell.

On Silverado’s and Sierra’s the engine fuse box is located on the right side of the engine bay when facing it, close to the top right corner. See the below picture for the location on 1999-2006 trucks. Note that this is what it looks like with the fuse box cover off. When you open your hood, this will have a plastic covering over it which should pop off very easily.

Silverado Engine Fuse Box Location

The second fuse box is located within the driver-side dashboard. When you open up the driver door, the fuse box is located within the flat part of the dashboard that is directly facing you / meets directly with the door when closed. The panel that it sits under is the triangle-like shaped panel. You should be able to pop it out pretty easily by pulling from the bottom of it.

Silverado Interior Fuse Box Location

Diagnosing a Blown Fuse

Now that you’ve found the fuse boxes, how can you tell if a fuse is blown? The majority of fuses will be made of a colored, see-through plastic. When you look inside of the plastic, you’ll see a small metal connector piece. This is the piece that provides the amp transfer from the battery to the system. When the fuse becomes overloaded and breaks or blows the metal connector piece will actually break.

You’ll notice the metal inside is actually snapped in half. This is a safety measure to prevent the overloaded amps from being transferred to your electrical system. Instead, the fuse blows and prevents the excess amperage from being passed to your components.

Here is a picture of a good fuse vs. a bad one. It is worth noting that the internal metal connector will not always be “S” shaped like the one in this example. More commonly they will look like an “n” or a hill.

Chevy Silverado Good vs Blown Fuse

1999-2006 Chevy Silverado Fuse Box Diagram

Note this diagram is also applicable for GMT800 1999-2006 GMC Sierra’s as well. While the covers for the fuse boxes should have these diagrams on the inside of the them, these cars are getting old now so they might be hard to read or have worn away by now.

Silverado Engine Bay Fuse Box Diagram

Silverado Engine Fuse Box Diagram

Silverado Engine Fuse Block Diagram

Silverado Engine Fuse Junction Block Diagram

Silverado Interior Instrument Panel Fuse Box Diagram

Silverado Interior Fuse Box Diagram

Filed Under: Chevy & GMC Trucks, GMT800

About Jake Mayock

Jake is an automotive enthusiast who has been blogging about Chevy's and European cars for years. With technical knowledge on performance modifications and engine problems, Jake has a passion for helping car enthusiasts fix problems and achieve their performance goals.

Reader Interactions

Comments

  1. Brian says

    May 15, 2021 at 2:36 pm

    Where is the fuse to pull to shut off my interior lights they won’t turn off. I can’t find anything that says. None of my fuse panels show interior lights.

    Reply
    • Ironsheek187 says

      January 24, 2022 at 6:13 pm

      If you own a 99-06 they have many electrical issues. Check the switches and momentary door switch on your doors, jams etcetera. Also if you have a multimeter you can easily find your problem. Or just take out the bulb.

      Reply
      • Greg says

        April 11, 2022 at 12:42 pm

        Not getting power to my siverado heat door moter.??

        Reply
  2. Matthew a wright says

    June 2, 2021 at 7:12 am

    I have same problem

    Reply
  3. Lorie says

    June 19, 2021 at 9:58 am

    Not sure what it’s called. My check engine light came on and took it to be scanned. The scanner would not work at two different auto places. I guy said it’s not getting a current and check the fuse to it. What’s it called and which fuse and where?
    Thank You

    Reply
    • shane murphy says

      December 22, 2021 at 9:36 am

      check power outlet and cigar lighter fuse i think they run the diagnostic ports as well

      Reply
    • Ironsheek187 says

      January 24, 2022 at 6:05 pm

      Check your cig lighter and auxiliary fuses. One of them also runs to your obd2 port.

      Reply
  4. Dibs says

    October 23, 2021 at 11:58 am

    Brian and Matthew, look for your fuse, typically under the hood, marked “CTSY LP.” That is the fuse for your courtesy/interior lights.

    Lori, you are looking for the data link fuse, also typically located under the hood in the fuse box. Yours will possibly be labeled Cigar.
    Both fuses you guys are looking for should be 15 amp.

    Reply
  5. Jon says

    December 28, 2021 at 2:19 pm

    Passenger side door switches and heater switch work they just do not light up. It was all 3 same time. Fuse maybe if so what one? 2000 Silverado

    Reply
  6. Joey says

    January 2, 2022 at 7:01 pm

    Hello and Happy New Year from Guam, USA. My driver side view mirror motor comes on every time I put the key in the ignition. Is there a fuse for that component?

    Reply
  7. Brandon wilson says

    March 26, 2022 at 4:43 pm

    Trying to fide the fuse for back passenger window 2006 chevy silverado crew cab

    Reply
  8. RAYMOND LEVERNE SWAVELY says

    June 6, 2022 at 9:03 pm

    I have a 2002 chevy silverado 3500 with a flat bed on it . There are four lights on the four corners of the flatbed body. Are these called day time running lamps. Where would the
    fuse be for these.

    Reply
    • Jake Mayock says

      June 8, 2022 at 8:52 am

      Raymond – here is a link to an owners manual for the 2002 3500 with the 6.6 Duramax. Pages 6-78 through 6-85 have the fuse box diagrams on them. I would generally pull any fuse related to exterior lights to check if it’s good, there will be a few.

      https://www.silveradosierra.com/d3/download/chevrolet/silverado/owners_manual/2002_chevrolet_silverado_owners.pdf

      Reply
  9. Donald says

    June 14, 2022 at 1:55 pm

    Could not find fuse or relay for power of sending unit
    2006 Chevy Silverado

    Reply

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