How to Replace the Fuel Cap on a 2012-2024 GMC Savana 2500 (Fix EVAP Leak & Check Engine Light) (Engine: V8 6.6L)
Step-by-step fuel cap replacement with safety tips, required tools/parts, and what to do if the CEL stays on
How to Replace the Fuel Cap on a 2012-2024 GMC Savana 2500 (Fix EVAP Leak & Check Engine Light) (Engine: V8 6.6L)
Step-by-step fuel cap replacement with safety tips, required tools/parts, and what to do if the CEL stays on for 2012, 2013, 2014, 2015, 2016, 2017
đź”§ Savana - Fuel Cap Replacement
Replacing the fuel cap is a quick job that helps prevent fuel vapors from escaping and can prevent an EVAP leak issue (often seen as a check engine light). On your Savana, it’s a simple remove-and-replace part with no special programming.
Difficulty Level: Beginner | Estimated Time: 0.1-0.2 hours
⚠️ Safety & Precautions
- ⚠️ Work outside or in a well-ventilated area—fuel vapors are flammable.
- ⚠️ No smoking, flames, or hot work near the fuel door.
- ⚠️ Turn the engine off and remove the key before starting.
- ⚠️ If the van was just driven, let it cool a few minutes before opening the fuel system.
- ⚠️ Battery disconnect is not required for this repair.
đź”§ Required Tools
You'll need the following tools for this repair:
- Nitrile gloves
- Shop towel
- Flashlight
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Fuel cap (OEM-style, tethered if equipped) - Qty: 1
đź“‹ Before You Begin
- Park on level ground, shift to Park, and set the parking brake.
- Make sure the engine is off and the key is removed.
- Wipe dirt away from the filler area using a shop towel so debris doesn’t fall into the tank.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Open the fuel door
- Use a flashlight if needed to clearly see the filler neck area.
Step 2: Remove the old fuel cap
- Put on nitrile gloves.
- Turn the cap counterclockwise by hand until it comes off.
- If your cap has a tether (a small strap that keeps the cap attached), gently unhook it from the filler door area if needed.
- Tip: If it’s stuck, wiggle while turning.
Step 3: Inspect and clean the sealing surface
- Use a shop towel to wipe the filler neck sealing surface clean.
- Check for cracks, missing rubber seal, or dirt buildup on the old cap—these commonly cause EVAP leaks.
- Tip: Clean sealing surfaces prevent false leak codes.
Step 4: Install the new fuel cap
- Align the new cap and thread it on by hand (clockwise).
- Tighten until it clicks (typically 1–3 clicks). “Clicking” is the built-in clutch that ensures proper tightness.
- Do not use tools to tighten the cap.
Step 5: Close the fuel door
- Close the fuel door firmly by hand.
âś… After Repair
- Start the engine and confirm there’s no fuel smell around the filler area.
- If you had a check engine light for an EVAP leak, it may take a few normal drive cycles to turn off on its own after replacing the cap.
- If the light stays on, the issue could be another EVAP leak (hose, purge valve, vent valve), not the cap.
đź’° DIY vs Shop Cost
Shop Cost: $25-$80 (parts + labor)
DIY Cost: $10-$35 (parts only)
You Save: $15-$45 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.1-0.2 hours.
🎯 Ready to get started?
HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.
Guide for Fuel Tank Cap replace for these GMC vehicles
| Year Make Model | Sub Model | Engine | Body Style |
|---|---|---|---|
| 2024 GMC Savana 2500 | - | V6 4.3L | - |
| 2024 GMC Savana 2500 | - | V8 6.6L | - |
| 2023 GMC Savana 2500 | - | V6 4.3L | - |
| 2023 GMC Savana 2500 | - | V8 6.6L | - |
| 2022 GMC Savana 2500 | - | V6 4.3L | - |
| 2022 GMC Savana 2500 | - | V8 6.6L | - |
| 2021 GMC Savana 2500 | - | V6 4.3L | - |
| 2021 GMC Savana 2500 | - | V8 6.6L | - |
| 2020 GMC Savana 2500 | - | V8 6.0L | - |
| 2020 GMC Savana 2500 | - | V6 4.3L | - |
| 2019 GMC Savana 2500 | - | V8 6.0L | - |
| 2019 GMC Savana 2500 | - | V6 4.3L | - |
| 2018 GMC Savana 2500 | - | V8 6.0L | - |
| 2018 GMC Savana 2500 | - | V6 4.3L | - |
| 2017 GMC Savana 2500 | - | V8 4.8L | - |
| 2017 GMC Savana 2500 | - | V8 6.0L | - |
| 2016 GMC Savana 2500 | - | V8 4.8L | - |
| 2016 GMC Savana 2500 | - | V8 6.0L | - |
| 2015 GMC Savana 2500 | - | V8 4.8L | - |
| 2015 GMC Savana 2500 | - | V8 6.0L | - |
| 2014 GMC Savana 2500 | - | V8 4.8L | - |
| 2014 GMC Savana 2500 | - | V8 6.0L | - |
| 2013 GMC Savana 2500 | - | V8 4.8L | - |
| 2013 GMC Savana 2500 | - | V8 6.0L | - |
| 2012 GMC Savana 2500 | - | V8 4.8L | - |
| 2012 GMC Savana 2500 | - | V8 6.0L | - |
















