Why are you being such a whore as to enthusiastically read the line about forgetting you have a gas cap on the GMC hybrid? If you owned this truck (and a fine vehicle basically as I have one) you would know it rarely gets half the gas mileage of a true hybrid truck or SUV such as the Ford Escape hybrid. Playing catchup to Ford and toyota, GM for years has been desperately misleading people with its hybrid label and marketing on a motor that primarily serves to provide AC power for tools and saves very very little gas by its only hybrid function of shutting down at SOME stops. Newest model better but still few real world owners break 20mpg though EPA tests say it is possible. Don't lie. If you actually owned one and used it everyday, you'd see the gas cap PLENty.