My husband has a 2001 Chevrolet Z71. It is running hot when idling for a while and he is hearing a noise coming from the motor. It's not a knocking noise. He recently had oil changed and had them put the kind of oil used in new vehicles. He wonders if he should have had them put the other kind in because he wasn't having problems with truck prior to oil change.
Sunday, July 24th, 2011 AT 2:32 PM