🔧 Grand Cherokee - Fuel Cap Replacement

Replacing the fuel cap on your Grand Cherokee is a very simple job. A worn, loose, or missing fuel cap can cause fuel vapor leaks and may trigger an EVAP-related check engine light.

Difficulty Level: Beginner | Estimated Time: 5-10 minutes

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⚠️ Safety & Precautions

• ⚠️ Work in a well-ventilated area away from flames, cigarettes, heaters, or sparks.
• ⚠️ Do not replace the cap while fueling or while fuel vapors are strong around the filler area.
• ⚠️ No battery disconnect is required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel cap - Qty: 1

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📋 Before You Begin

• Park your Grand Cherokee on level ground and shift to Park.
• Set the parking brake.
• Turn the ignition off and keep the key away from the Start button area.
• Let the vehicle sit for a minute before opening the fuel door if you just drove it.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Fuel Door

• Use your hand to press the rear edge of the fuel door inward, then release it.
• The fuel door should pop open.
• Press gently; do not pry.

Step 2: Remove the Old Fuel Cap

• Put on nitrile gloves and safety glasses.
• Use your hand to turn the old fuel cap counterclockwise until it comes loose.
• A counterclockwise turn means turning it to the left.
• If the cap has a tether, pull the tether button or loop free from the fuel door area by hand.

Step 3: Inspect the Filler Neck

• Use your eyes to check the metal fuel filler neck where the cap seals.
• Look for dirt, rust, damage, or pieces of the old rubber seal.
• Wipe light dirt away with a clean glove-covered finger or clean cloth if needed.
• Do not push anything down into the filler neck.

Step 4: Install the New Fuel Cap

• If the new cap has a tether, attach the tether to the same mounting point on the fuel door area by hand.
• Place the new fuel cap squarely onto the filler neck.
• Use your hand to turn the cap clockwise until it clicks.
• A clockwise turn means turning it to the right.
• Tighten until you hear at least one click; three clicks is a good beginner-friendly check.
• No torque spec is used for this cap because it is hand-tightened by its built-in click mechanism.

Step 5: Close the Fuel Door

• Use your hand to push the fuel door closed until it sits flush with the body.
• Make sure the fuel cap tether is not trapped between the door and body.
• A pinched tether can keep the door open.

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✅ After Repair

• Start your Grand Cherokee and confirm there is no fuel smell around the fuel door.
• If a loose-cap message was showing, it may clear after several drive cycles.
• If the check engine light was on from an EVAP leak, it may also take several trips to turn off by itself.
• If you have a scan tool, you can clear the EVAP code after replacing the cap, then drive normally and make sure it does not return.

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💰 DIY vs Shop Cost

Shop Cost: $60-$130 parts + labor

DIY Cost: $15-$45 parts only

You Save: $45-$85 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.2-0.4 hours.

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🎯 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.