Mike,
i have experianced very bad gas consumption 4.3 4spd ele transmission 1st tank full 20mpg and that went down hill to 12mpg. brakes on slippery surface when hitting dry patch hear loud mecahnical noise. cruise control when pre-set in traffic, tap brake pedal to slow down when pushing resume button to go back to pre-set speed the gas pedal goes to the floor speeding up to the prew set speed )i feel is unsafe) complaints have been given to new car dealer sence i got it. when they test same the responce is always the same its with in mfg specifications. they can not explain low mileage etc. do you have suggestions what may be wrong--or is it just me???? do you contact me with your answer????i was surfing the internet and found consumers affairs...thank you for any offering..
bob laux

It sounds to me like you have a couple of serious problems. In your owners manual and warranty papers is an address of General Motors that handles customer complaints. Write your dealer with a letter addressing the unresolved SAFETY related problems along with the fuel mileage drop off concern. Send copies to GM and the National Highway Traffic Safety Board. Both these are listed in your owners manual. Check out "lemon laws" in the state you live in all 50 states do have a way of addressing unresolved auto problems, don't let your dealer take advantage of you. If you don't find the addresses you need email me back.

Mike