2015-2020 Colorado & Canyon Underhood Fuse Box: Solving Electrical Issues & Part Number Guide
This guide covers the diagnosis, replacement, and critical compatibility differences for the main underhood fuse box in the 2015-2019 Chevrolet Colorado and 2015-2020 GMC Canyon.
- The underhood fuse box for 2015-2020 Colorado/Canyon models does NOT require programming.
- Gasoline (2.5L/3.6L) and Diesel (2.8L) engine fuse boxes are NOT interchangeable. You must buy the correct one.
- Before replacing the box, press down on all fuses to ensure they are fully seated, as this is a common factory issue that causes electrical problems.
- For 2015 models, check for a 30A fuse in the F45 slot (brake vacuum pump) due to a factory service campaign (N140203).
Is Programming Required for a Replacement Fuse Box?
No, the underhood fuse box on the 2015-2019 Chevrolet Colorado and 2015-2020 GMC Canyon does not require any programming or flashing after installation. It is a non-intelligent part that simply distributes power. This makes replacement a straightforward plug-and-play process once the correct part is obtained. This is different from the interior fuse panel (Instrument Panel Junction Block), which on some newer vehicles is a 'smart' module that does require programming. For the underhood fuse box on these specific model years, no dealer visit for programming is necessary.
Known Issues, Recalls, and Bulletins
Customer Satisfaction Program N140203: Incorrect Fuse Rating (2015 Models)
In December 2014, General Motors issued a service program for certain 2015 Chevrolet Colorado and GMC Canyon trucks. These vehicles may have been assembled at the factory with an incorrect 60-amp fuse in the F45 position, which protects the brake vacuum pump circuit. This circuit is designed for a 30-amp fuse. The incorrect, higher-rated fuse could fail to protect the circuit wiring in the event of a short. The fix involved dealers replacing the 60A fuse with the correct 30A fuse and installing a new fuse box cover with the updated diagram. If you have a 2015 model, it is wise to check the F45 fuse and ensure it is a 30-amp fuse.
Loose Fuses From the Factory
A widely reported issue on many GM trucks is that fuses in the underhood fuse box may not have been fully seated during assembly. This can lead to a host of bizarre and intermittent electrical problems, including check engine lights, non-functional accessories, or stalling. Before assuming your fuse box has failed, it is a crucial first step to open the cover and press down firmly on every fuse and relay with your thumb to ensure they are all fully seated. This simple action can solve many electrical gremlins at no cost.
🎬 See how to identify and fix common GM ground issues.Symptoms of a Failing Fuse Box
A problem with the fuse box itself is different from a single blown fuse. While a blown fuse points to an issue in a specific circuit, a failing fuse box indicates a problem with the power distribution center itself.
- Multiple Unrelated Electrical Failures: Systems that are on different circuits failing at the same time can point to a fault within the fuse box.
- Melting or Burning: A burning plastic smell, visible scorch marks, or melted plastic on the fuse box or around fuse terminals is a clear sign of failure. One owner of a 2015 Canyon reported their truck went into limp mode after the fuse box was found to be burnt out.
- Loose Fuse Sockets: If fuses no longer fit snugly into their terminals, it can cause intermittent power loss to that circuit. This internal damage requires the box to be replaced.
- Corrosion: Green or white crusty buildup on the terminals or connectors, often caused by water intrusion, can create poor connections and electrical shorts.
- Frequent Blown Fuses: If a specific fuse blows repeatedly even after checking the circuit's components, it could be due to a short within the fuse box's internal wiring.
Pro Tip: Before replacing the fuse box, always perform a thorough visual inspection. Disconnect the battery, unbolt the fuse box, and look at the large connectors on the underside. This is a common area for corrosion and melting that may not be visible from the top.
Buying a Used Fuse Box: A Buyer's Guide
Since new aftermarket fuse boxes for these trucks are generally not available, a used OEM unit is the most common and cost-effective solution. However, careful selection is critical to ensure compatibility.
1. Match Your Engine: Gas vs. Diesel
Warning: The fuse boxes for gasoline engines (2.5L I4 and 3.6L V6) are NOT interchangeable with the fuse box for the 2.8L Duramax Turbo-Diesel engine. The diesel trucks have different electrical requirements, including circuits for glow plugs and emissions systems. All part numbers for gas engine fuse boxes explicitly state "without diesel." You must purchase a fuse box from a truck with the same type of engine as yours.
2. Verify the Part Number
The single most important step is to match the part number. If possible, find the number printed on your original fuse box and buy one with the exact same number. If your original part is damaged or the number is unreadable, you will need to match it based on your vehicle's year, engine, and options. Be aware of part number supersessions, where GM has replaced an old number with a new one.
| Part Number | Supersedes (Old Part Numbers) | Engine / Year Fitment & Notes |
|---|---|---|
| 85169042 | 22904846, 84388796, 84496900 | Fits 2015-2022 Colorado/Canyon with 2.5L or 3.6L Gas Engines. This is a common, later-design part. |
| 84076946 | 23299776, 23487319 | Fits 2015-2018 Colorado/Canyon with 2.5L or 3.6L Gas Engines. Often specified as "with fog lamps." |
| 84168215 | 23231595 | Fits 2017-2018 models with the 3.6L V6. For Chevrolet Colorado, it is specified as being for trucks without the off-road package. |
3. Physical Inspection
- Check for Corrosion: Do not buy a fuse box with any signs of water damage or corrosion on the terminals.
- Inspect for Heat Damage: Look for any melted plastic, especially around the sockets for high-amperage fuses and relays. Check the large connectors on the bottom for discoloration or melted pins.
- Check for Cracks: Ensure the plastic housing is not cracked or broken, which could allow moisture and dirt to enter.
- Fuses and Relays: Most used fuse boxes are sold as a bare assembly. You will need to carefully transfer all fuses and relays from your old box to the new one. This is a good time to inspect each fuse.
Cost to Replace the Fuse Box
Replacing the underhood fuse box is more affordable than many other electronic modules because it does not require programming.
| Part Source | Estimated Cost | Notes |
|---|---|---|
| New OEM | $70 - $400 | Price varies significantly by part number. For example, part #85169042 is around $70-$100, while #84076946 can be over $300. |
| New Aftermarket | Not Available | Complete aftermarket fuse box assemblies are not commonly sold for these models. |
| Used OEM | $75 - $200 | A common option from salvage yards or online sellers. Price depends on condition and included components (fuses/relays). |
| Shop Labor | $100 - $200 | The job takes about one hour. This includes disconnecting the battery, swapping the box, and transferring fuses. | 🎬 Watch this walkthrough of a complete vehicle fuse box replacement.
Frequently Asked Questions (FAQ)
Do I need to program a replacement underhood fuse box?
No. For the 2015-2020 Colorado and Canyon, the underhood fuse box is a non-programmable part. You can install a replacement without needing a trip to the dealer for programming.
Can I use a fuse box from a gas engine truck in my 2.8L diesel?
No. The fuse boxes are different and not interchangeable. You must use a fuse box from another 2.8L diesel truck.
🎬 Watch: See a fuse block installation on a Duramax 2.8L diesel.Does a used fuse box come with fuses and relays?
Typically, no. Most used fuse boxes are sold as the bare block. You should plan to carefully remove all the fuses and relays from your original box and transfer them to the replacement. This is also a good opportunity to inspect each fuse for damage.
Where is the underhood fuse box located?
It is located in the engine compartment on the driver's side, near the battery. It has a black plastic cover with a diagram of the fuse locations on the inside.
Helpful Videos
Technical Specifications
OEM Part Numbers: 22904846 23231595 23299776 23487319 84076946 84168215 84317490 84388796 84496900 85169042
Location: Engine bay, driver's side, near battery.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Chevrolet Colorado:
- GMC Canyon:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Programming Required for a Replacement Fuse Box?
- Known Issues, Recalls, and Bulletins
- Customer Satisfaction Program N140203: Incorrect Fuse Rating (2015 Models)
- Loose Fuses From the Factory
- Symptoms of a Failing Fuse Box
- Buying a Used Fuse Box: A Buyer's Guide
- 1. Match Your Engine: Gas vs. Diesel
- 2. Verify the Part Number
- 3. Physical Inspection
- Cost to Replace the Fuse Box
- Frequently Asked Questions (FAQ)
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