Locking Gas Cap

I can't help you with the cap, but I can tell you they don't work around here. Now if you have a tank that is ice pick proof, maybe then.:E

Hope your successful, somebody might have info.
Helpful hint, don't toss your old one away when you get the new one. We got a replacement(different model)and the check engine light kept going off with new cap even though we got what is supposed to be replacement. Now on 3rd replacement cap.

I have found it is easier to let them steal the gas than replace the gas tank that had a hole punched in it.

Don't use a locking cap, if you lose the key your're SOL filling up. PLUS like others have said, a new gas tank is expensive because of a puncture.

I purchased mine about 5 years ago and I did save the box. I purchased it from GM dealer, do not remember the price but mine is an AC Delco, ACD#GT270, GM#22720375. I hope this helps, I have a 2003 National on Workhorse Chassis.

powderman426 wrote:
I can't help you with the cap, but I can tell you they don't work around here. Now if you have a tank that is ice pick proof, maybe then.:E

A locking cap isn't to stop removal of gas. It is to stop things from being put in the tank. They can have the fuel that is nothing compared to a $5 or $6K engine repair because things went into the tanl.

How often do you hear that? Someone putting something in the tank other than fuel. You live in a bad neighborhood!!!

don b wrote:
I purchased mine about 5 years ago and I did save the box. I purchased it from GM dealer, do not remember the price but mine is an AC Delco, ACD#GT270, GM#22720375. I hope this helps, I have a 2003 National on Workhorse Chassis.

Just dropping in to say: WOW!

It just doesn't get any more helpful than that....this is one of the things that's so great about this site- there are folks like you, Don, that will take the trouble to actually dig out an old box and get the exact part number for the person asking the question.

In an effort to make a small contribution, here are live links to sources for the parts Don identified: ACD#GT270 and GM#22720375

I have a 2004 National RV Dolphin LX 6342 on a Workhorse W22 with the 8.1 Vortec

I am looking for a locking gas cap for this rig.
I have taken the existing cap to all the local parts houses (NAPA, Auto Zone, O'Reily's) and RV dealer's with no luck.


I found a locking gas cap from Napa Auto parts for my Dodge truck. I then went to the local Farm Supply store and bought a spray can of "John Deer" green and sprayed the cap to remind me or others i.e. Oregon stations that it is a DIESEL NOT GAS:):):)

WyoTraveler wrote:

powderman426 wrote:
I can't help you with the cap, but I can tell you they don't work around here. Now if you have a tank that is ice pick proof, maybe then.:E

A locking cap isn't to stop removal of gas. It is to stop things from being put in the tank. They can have the fuel that is nothing compared to a $5 or $6K engine repair because things went into the tank.

Good point. I had not thought about someone putting something in the tank. I may have to rethink my choice.