2004 Pontiac Grand Prix GTP Q&A
2004 Pontiac Grand Prix GTP Question: engine makes whining sound when first running.
It could be many things, unfortunately and without hearing the noise first hand or being able to do some basic diagnostic tests or be able to drive the car, its hard to say what the source of the noise may be. Look at the fan belt make sure it is tensioned OK, if that engine has a harmonic balance pulley that has a bonded rubber ring between the pulley and the fan belt hub I have seen them fail on some engines. Does the noise occur when the transmission is put in drive with your foot on the brake ie the engine torqued under load? - patrick mannion