2019 GM Tonneau Cover Leaking BADLY

johnwyork · January 9, 2020

So it sounds like GM Customer Service is going to possibly send a replacement, which was worrisome since I was afraid the replacement would leak also. The original cover is part # 84060328, but it appears that possibly GM pulled that cover after a redesign (maybe?) and now the part # is 84679033. I could not find any information to look for differences between these 2 covers. So now I'm faced with the decision on whether or not to let GM send this newer part # cover, but surely it will be better.

Can anyone provide any info or where I might can find some info between the 2 covers?

Thanks!

John York

John Wang · April 20, 2020

After I traded in my 2017 Sierra LT for a 2019 Sierra Denali, I needed a new cover and got this instead:

https://www.amazon.com/gp/product/B07HHJJBZ3/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

This leaks very little from my experience over last 6 months. The GMC cover that came with my 2017 Sierra definitely leaked more during drive through car wash. You might just need to tighten the clamps.

rhl · July 16, 2020

I recently had the dealer install the Rev hard folding cover. 6 trips to the dealer later, (for various tonneau issues including heavy leaking) they are taking it off today and refunding my money. I told them to come to the house to pick it up and bring it back later sans cover with $$ for refund. They agreed. I was not making a 7th trip to the dealer for tonneau issues. This was a total mess and the last time they tried to fix the leaking (after receiving new weatherstipping from the mfgr) it leaked worse than ever. All four corners. i understand that these things arent waterproof, but this wasn't even close. I am going to go to a local truck parts/accessories store that specializes in this stuff and buy a different one from them and they will install it.

Fishmobile · February 4, 2021

On 1/8/2020 at 10:49 AM, BigBadSierra said:

My dealer installed one leaked real bad but when I looked they set it to far forward. So i had to adjust it. Now it's back to a normal cover leak just a few drops here and there.

How did you adjust the cover? I'm currently dealing with leaking at the tailgate