DanL

Well I'm now in the 4th week that the dealer has had the truck. They've reported to me that the leak was from a broken weld in the passenger front wheel well, then they said it was from a broken weld in the windshield wiper compartment, then they said neither one of these was the source. A week ago they said the entire passenger compartment had been stripped-seats, dash, carpet, etc. Last Thursday (Nov. 10th) they called and said they determined the source of the leak really was from the windshield wiper compartment. They are hoping to have it put back together by this coming Monday or Tuesday. This will be 28 days with my truck. Needless to say, I'm not too impressed with the dealerships diagnostic team and, for that matter, the entire service and body shop departments. We will see during the next rain how they did.

Well the dealer has now had my 2016 Sierra Denali 2500HD diesel for 4 1/2 days after I found my passenger front floor saturated after some heavy rain. My first thought was evaporator drain. They said that wasn't it. They sent it to a window shop to check all seals and the moon roof. Negative. They brought it back to the dealership and put it under a "shower". No leaks found. Then they asked me if I may have left the window open. I won't repeat my reply. I told them I wanted them to re-check the firewall openings, etc. An hour later they called and said the leak had been found! It was a bad weld in the r/s wheel well letting water in. Now, they said, it turns into a body shop issue and they were about to call GM for authorization. We'll see. At least they gave me a loaner for the duration!

Investigation continues Dunc..............

Mike-I'll check closer. The indicator lights not coming on as they have in the past several trucks I've owned concerned me. With only a 10 minute window, they don't have time to warm up a lot but I'll check closer.

Anyone had an issue when using remote start where seats do not heat up/cool. The settings for both are set to "on" but neither works with remote start in my '15 Sierra Denali.

I've noticed the same thing. Do you have a moon roof?