Rich Kesteloot

So I have had my Sierra 1500 for almost two years and have 42K on it. I usually drive by myself and it was not until recently that my Daughter sat in the back seat on a road trip during a driving rainstorm, she said her hair was getting all wet. I pulled over and noticed water dripping from the rear window slider track. Looks like the headliner is stained as well and appears it's been leaking a long time. I took to the dealer and they said it's going to cost me hundreds of dollars to fix as there is a bulletin and I'm out of the manufacturer warranty. They said it's clearly a manufacturer defect but I'm past the warranty and they"ll make no concessions. I do have an extended warranty that I purchased and guess what they don't cover Manufacturer defects. So who's responsible for manufacturer defects? I guess me? Frustrated.

I purchased this with the add on module for my 2019 GMC Sierra Denali 1500. I tried the curt adapter and I tried hardwiring as Opt 7 shows in a youtube video. Both of these installs disabled my sensors and cross traffic alert thinking I was towing something. Does anyone have a good remedy to solve this. I contacted Opt7 and they said just send the product back for a full refund but I really like the look of the lights but losing all safety features is a real bummer. Anyone have success with this? Or suggestions.

I ordered this light bar for my 2019 GMC Sierra 1500 after I was rear ended 30 days after purchase. it works great except the dealer plugged it into to my trailer port which disables my Rear cross traffic sensor and my parking sensor, not to mention it thinks I have a trailer attached every time I start the truck. I order the adapter with the original purchase and send it to my dealer to have them install while fixing my frame etc. I see they plugged the adapter in (see Photo) but it looks like they just extended the plug to the trailer input. What is the adapter supposed to do?????? They don't seem to get it. Any insight would be helpful. Thanks.

Ok My dealer has been trying to help me with this which I do appreciate. They did take it in and replaced the differential(ring and Pinion) and they said they verified that it had excessive run-out. I was driving a 2019 Yukon as a loaner until mine was fixed and I noticed the same noise between 60-80 mph although it was not as pronounced. I received my 2018 Yukon back from the dealer and the same noise is still there and as loud as it ever was. The replacement of the differential(ring and pinion) did not fix the problem. I did tell them the loaner has the same issue so I wonder if they have to disclose this prior to selling that vehicle? I am now working with the owner of the dealership on trading my 3-month-old Yukon for another viable option. I just can't get over the annoying whining noise for a 50K plus vehicle. Cadillac/GMC/Chevy Truck and SUV bulletin regarding the same issue they had recalled for 2014-2016 products with a "high speed whining noise" It was a multiple step guide to fix this is which started with the Ring and Pinion then the drive shaft then the rear axle. See the link below on the bulletin. https://gm.oemdtc.com/7200/pip5196-rear-axle-gear-or-bearing-whine-noise-at-highway-speeds-2015-cadillac-chevrolet-gmc Video of whining/ringing noise, listen for it behind the road noise. At 13 seconds in the accelerator hits 77 mph to cruise.

I have a 2WD 2018 GMC Yukon and have the same annoying noise between 60-80 MPH. When I let off the gas pedal it goes away. only 6,000 miles on it.