ecbello

Went to the dealer and test drove the 2020 Silverado 2500HD High Country Dieslel 6.6 Duramax for about 10 miles, and it drove and sounded great on 08.13.20. Purchased and picked up that same 2020 Silverado 6.6 Duramax Diesel High Country from the dealer on 08.14.20, and drove it 75 miles to my home. Once I pulled into my driveway, lowered the radio volume and put it in park, it's where I notice the knocking noise. The truck shows 129 miles on the odometer. I've driven and owned diesel trucks before and never heard a noise like this. It's almost like someone is banging softy on a wooden door with a small hammer. It's definitely not a diesel engine normal noise. It's not a ticking, wrapping or squealing noise. It's a knocking noise. Coming from a mechanical and engine rebuilding field, for almost 30 years, this noise almost sounds like the noise I used to hear when there was a worn thrust main bearing on a crankshaft. The crankshaft tends to move back and forth creating a knocking noise every revolution due to excessive clearance. I'm not saying it's a main bearing failure, I'm saying it sounds just like it. I have no idea where the noise is coming from, but it sounds like its more prevalent towards the back of the engine near the bell housing. The noise tends to increase when accelerating, and definitely sounds louder when you step out of the vehicle. I was pissed, confused and couldn't sleep thinking as to why such a noise on a new engine and vehicle. I spent 70k with taxes and fees and definitely didn't pay to hear such a noise. I'm reading and watching videos online, with other people, with the same complaint. Woke up this morning early to write this, and I will be the first person at the dealer door this morning to attempt to return this truck. I'm will not be buying from their technicians or management that this is normal for these trucks. That seems to be always the case when they want to weasel their way out of a known problem or a warranty issue. The dieseling noise is normal, but not the knocking noise. I will keep you posted on the outcome. Listen to noise here. Not my video, but same noise:................https://youtu.be/I4mr0G8cP1w