Not up GM's warranties, but if he is in warranty, I don't see a problem. For more concrete advice, I think the site is www.lemonaidcars.com. Phil Edmonston actually replies to e-mails, and can be very helpful.

What is the noise? Could it be the dreaded GM Piston slap issue? Is it just a pulley. Please describe the noise. Maybe someone on the site will know what it is.

98 Silver Frost SVT 97 BMW 540I Sport, six speed "Blue is for sky, black is for soil, and white is for simplicity, purity and hope for the future" "A coveted car should never stunt your life, but should make it more rich and interesting."