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About JeffK1

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    New Member

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    2019 Sierra Denali, 2016 BMW 328D wagon
  1. I just got off the phone with a level 2 GMC Customer Service. They confirmed that they are no longer selling this cover. They claim the mfg (in China) is working on a fix. They will not recall or issue refunds for this defective product. The clamps keep popping open and one day soon someone is going to get killed by a tonneau cover blowing off at 80mph and hitting a windshield. They are dumping the responsibility on the dealer. I don't love my dealer, but he bought this part from GM in good faith, why should he eat it?
  2. I was at the dealer today getting my free oil change and again complained about my leaking hard tri-fold tonneau cover. I have had it back twice for this problem. My old Denali had the a hard cover for 6 years and never leaked. The service writer told me that there is a Stop Sale order from GM on the cover. It seems they are loaded with problems and don't have a way to fix it. I asked for my money back on told him to remove it. I got a laugh. I called GM this afternoon and opened a case. I hope someone takes responsibility for this piece of Chinese junk.
  3. Had the truck at the dealer yesterday for a vibration in wheel and floor. I assumed it was a tire balance problem. Dealer says the vibration occurs when the engine drops to 4cyl mode. I also have the factory cat back system that causes vibration in rear seat. For almost 70k this sucks! Were the NVH engineers out to lunch when they designed this truck? In the past I have put together my own exhaust systems and worked through harmonic vibration problems. I wrongfully assumed that GM had done this work for me. A change in motor mounts and possibly a heavier flywheel might cancel out the 4 cyl problem. It reminds me of a similar problem when the industry started using v6 engines instead of a straight line 6. Anyone have a similar experience with the 6.2?
  4. I recently had the factory cat back exhaust installed on my 2019 Sierra Ultimate 6.2 by the dealer. I saw on a Silverado reference that I have to change the calibration on the Bose Active Sound Management software. Does anyone know where to find the new calibrations?

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