Stant 10511 Locking Fuel Cap

As previously stated, you can go the Stant's web site to find the model that fits your vehicle. I found one for my 2008 Sierra (flexfuel) and it works great. It is easy to get on and off.

This fuel cap fits my 2004 GMC Sierra. Stant has a tool on their website to find the gas cap that will fit your vehicle. The cap is a little tricky to get off. You have to put the key in, then turn the key and the rest of the cap. Definitely a good investment though because a $12 cap can protect you from getting $65 worth of gas stolen from you.

This Cap is for the 2005 Chevy Silverado Extended Cab 2WD.
There are two separate fuel cap designs that GM made for this truck. One has a threaded neck and one does not have a threaded neck. You have to look at the original fuel cap that came with your truck. My truck originally came with a non locking non threaded fuel cap from the factory. So I replaced it with the Stant 10511 locking fuel cap. You cannot find these anywhere! Pepboys, Kragen, Autozone etc! I found it on Amazon finally! It is a quality locking fuel cap. Do not buy Fram fuel caps as they cause your check engine light to come on!