🔧 Fuel Cap - Replacement

Replacing the fuel cap on your Grand Cherokee is a very simple job. A worn, loose, cracked, or missing fuel cap can let fuel vapors escape and may trigger an EVAP leak warning or a check engine light.

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

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⚠️ Safety & Precautions

• ⚠️ Work in a well-ventilated area and keep flames, cigarettes, sparks, and hot tools away from the fuel filler area.
• ⚠️ Do not replace the cap while refueling.
• ⚠️ If fuel has spilled near the filler neck, wipe it up before installing the new cap.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Clean shop towel

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel filler cap - Qty: 1

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📋 Before You Begin

• Park your Grand Cherokee on level ground.
• Shift to Park and set the parking brake.
• Turn the engine off and remove the key from the ignition.
• Let the area around the fuel door cool if the vehicle has been sitting in direct sun.
• A fuel cap seal is the rubber ring on the cap that seals against the filler neck to stop fuel vapors from escaping.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Fuel Door

• Use your hand to open the fuel filler door on the driver-side rear quarter panel.
• Put on nitrile gloves and safety glasses.
• Use a clean shop towel to wipe dirt away from the cap and filler neck area.
• Keep dirt out of the tank.

Step 2: Remove the Old Fuel Cap

• Use your hand to turn the old fuel cap counterclockwise until it comes loose.
• If the cap has a retaining tether, let the cap hang carefully while you inspect how the tether is attached.
• No torque wrench is used here because the fuel cap is hand-tightened only.

Step 3: Remove the Fuel Cap Tether

• Use your hand to detach the old cap tether from the fuel door or filler-area mounting point.
• The tether is the small plastic strap that keeps the cap from falling away from the vehicle.
• If the tether is clipped in, gently squeeze or slide the clip by hand until it releases.
• Do not pry hard on the fuel door or painted body panel.

Step 4: Inspect the Filler Neck

• Use a clean shop towel to wipe the sealing surface at the mouth of the filler neck.
• Look for dirt, rust flakes, cracks, or damage where the fuel cap seal contacts the filler neck.
• If the filler neck surface is badly damaged, a new fuel cap may not seal correctly.

Step 5: Install the New Fuel Cap Tether

• Use your hand to attach the new fuel cap tether to the same mounting point used by the old cap.
• Make sure the tether does not twist or interfere with closing the fuel door.
• Route it like the old one.

Step 6: Install the New Fuel Cap

• Place the new fuel cap squarely onto the filler neck by hand.
• Turn the cap clockwise by hand until it clicks.
• Continue turning until you hear several clicks; this means the cap’s built-in ratchet has tightened it correctly.
• Torque to hand-tight until audible clicks are heard.

Step 7: Close the Fuel Door

• Use your hand to close the fuel door fully.
• Make sure the fuel door sits flush with the body.

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✅ After Repair

• Start your Grand Cherokee and check that no fuel smell is present around the fuel door.
• If the check engine light was on from a loose or leaking fuel cap, it may take several drive cycles to turn off on its own.
• A drive cycle means the vehicle is started, driven, warmed up, and shut off under normal conditions.
• If you have a basic OBD-II scan tool, you can use it to clear the EVAP-related code after installing the new cap.
• If the check engine light returns, the EVAP system may have another leak that needs diagnosis.

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💰 DIY vs Shop Cost

Shop Cost: $45-$110 (parts + labor)

DIY Cost: $15-$35 (parts only)

You Save: $30-$75 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.