My Z71 Tahoe starting making terrible clunking noises at 14,000 miles. Take it in and of course it's lifters. After my truck sat at the dealership for 2 weeks and being told it could be months due to a national backorder on parts, I halfway joking asked if they'd be interested in buying the vehicle. 15 minutes later they offered me $72k for my Tahoe which only had an original sticker price of $68k. SOLD.....Duramax High Country Tahoe on the way. Hope these new 3.0 diesel's don't have a many problems as the 5.3's!!!