Hi All..
Anyone else out there going through the frustration of trying to get GM to do something about the knocking noise on cold start-up of these vehicles? Determined it is indeed piston slap but am not satisfied with the answer that it's "normal" for these types of engines. Seems to be getting progressively worse. I'm interested in touching-base with anyone who is going through this now. Email me at snipped-for-privacy@hotmail.com
Thanks