Locking gas cap

[tinman]

Thanks to you all. BTW, I;m more worried about vandalism than lost gas, but it's cheap protection against both.

 

[Bedhead514]

I recently replaced the fuel pump in my '03 Yukon and found there were screens in the fuel line at the back of the tank that make siphoning fuel impossible. A thief would have to disconnect the filler hose at the tank and remove the screen to gain access to the fuel. Hope this helps.