Your 2004 GMC envoy gets terrible gas mileage it gets 13 mpg around town and 16-17 on a trip is this normal you just got it this summer and thought the range would be higher it has a 6 cylinder?

Answer 1

My Envoy has the inline 6 cylinder and gets about 22mpg on the highway. I'm not sure about city driving but it isn't much less. If I had to guess I would say 17. Both are acceptable to my in exchange for the comfort that comes with my Envoy. I noticed that the gas mileage goes down considerably if I "get on it" too much. If you are driving the Envoy hard, like taking off fast from stop lights or hitting passing gear quite a bit when your out on the highway that would have a significant impact on gas mileage. It does with my Envoy. I drive like an old man. I cruise at about 70 mph on the highway and the tachometer is right around 2000 rpm. Maybe a little below that. In town I drive the speed limit and accelerate at a normal speed too. I never hit the accelerator so hard that the transmission drops a gear and the engine rpms jump up by a few thousand rpms. If your driving habits are like mine then I would check the oxygen sensor.