TheChief

2020 TB 6.2 10 speed. Same issue. 12,****** miles. Whining occurs during cold start or when truck has been sitting for a few hours or more. Whines for 20-30 secs, and under low rpm while driving. Read all 7 pages of this thread. And from what I gather there doesn't appear to be a fix and it is considered normal for 6.2s. Someone please correct me if I'm wrong.

FWIW: https://cars.usnews.com/cars-trucks/chevrolet/silverado-1500 "Is the Chevrolet Silverado Reliable? The 2021 Chevrolet Silverado has a stellar predicted reliability rating of five out of five."

Any issues since the TSB was applied to your vehicle?

Any issues since clearing the code about 2 months ago? Just got the code and cleared the code myself.

Just got this installed ~1 week ago. It is perfect for me. Not too loud but definitely know it's there. If gm performance exhaust is 5/10 loud this would be 6.5/10 and S-type would be 7/10 loud. Sounds better than the Borla S-Type IMO. As another user stated it is not raspy sounding, but instead just straight up deep and mean! Zero to little drone. If there is any, i'm not noticing it! Not sure why this isn't a more popular option, but it def should be!

I believe it will only work with stock silverados IF you have installed a 2 or 3" block in the rear.

They've got the rears for 2019/20 TB/AT4's: https://performancelifts.com/bilstein-2019-current-silverado-sierra-1500-4x4-rear-shock-24-309516.html Fronts coming soon?

Thank you! Sounds amazing.

Thanks for the info guys! Sounds like I'll be going S Type.

Exhaust tips look really good. How are you liking the sound? I know it's subjective but is it too loud? Looking for something that makes my 6.2 sound more like it should but isn't too loud unless you punch it.