🔧 Grand Cherokee - Fuel Cap Replacement

Replacing the fuel cap on your Grand Cherokee is a quick job that helps prevent fuel odors, keeps debris/water out of the filler neck, and can prevent warning lights related to the EVAP system (less common on diesel, but still possible).

Difficulty Level: Beginner | Estimated Time: 0.1-0.3 hours

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⚠️ Safety & Precautions

• ⛽ Work outside or in a well-ventilated area; fuel vapors are flammable.
• 🚭 No smoking, sparks, or open flames near the fuel door.
• 🧤 Wipe dirt away from the filler area so it doesn’t fall into the tank.
• 🔋 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
• Shop towel
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel filler cap (diesel-compatible) - Qty: 1
• Fuel cap tether (if damaged or missing) - Qty: 1

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📋 Before You Begin

• 🅿️ Park on level ground and turn the ignition off.
• 🧼 Use a shop towel to wipe dust/grit away from the filler opening and cap area.
• 🔎 Look at your filler neck: if you see a spring-loaded flap instead of threads, you have a capless-style filler.

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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 door.
• Use a flashlight to look at the filler opening and confirm whether it’s threaded (uses a screw-on cap) or capless (uses a flap).

Step 2: If your Grand Cherokee has a screw-on cap, remove the old cap

• Use your hand to turn the cap counterclockwise until it comes off.
• If there is a tether (the little strap that keeps the cap from getting lost), use your hand to unhook it from the cap if it’s separate.
• Use a shop towel to wipe the sealing surface on the filler neck (the smooth rim the cap seals against).

Step 3: Install the new screw-on cap

• Use your hand to place the new cap onto the filler neck and turn clockwise until it’s snug.
• Continue turning until you feel/hear it “click” (if your cap is the ratcheting/click type).
• Reconnect the tether by hand if equipped.
• Snug is enough—don’t over-tighten.

Step 4: If your Grand Cherokee has a capless filler, replace the cap only if you’re missing the protective cap

• A capless system normally has a spring-loaded flap and may only use a small protective cap/cover.
• Use your hand to remove/install the protective cap (if equipped) and ensure it fully seats.
• Use a shop towel to wipe around the flap area; do not push debris inside.

Step 5: Close the fuel door

• Use your hand to close the fuel door until it latches.
• Use a flashlight to confirm the cap sits straight and the tether isn’t pinched.

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✅ After Repair

• 🔍 Start your Grand Cherokee and check for any fuel smell around the fuel door area.
• 🛣️ Drive normally; if a warning light was on due to a loose/missing cap, it may take a few drive cycles to clear.
• 🧼 If you spilled any fuel, wipe it up with a shop towel and let the area air out.

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💰 DIY vs Shop Cost

Shop Cost: $40-$120 (parts + labor)

DIY Cost: $15-$45 (parts only)

You Save: $25-$75 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.2-0.5 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.