zelmo

Thanks for the feedback. Will the app come on automatically when a trailer is hooked up that does not have electric brakes? Will the trailer lights be enough to trigger it?

Which Michelin model do you have?

For those that have the GMC with the trailering app do you find it useful or is it just a gimmick that you forget about when the novelty wears off? I tow a 4000 lb boat and nothing else so the ability to save multiple trailer profiles isn't necessary. The trailer has surge brakes, not electric, so I don't need to mess with gain. I also don't tow all that far so I really don't need to monitor tire pressure although that is a feature I think I would use. Tracking the mileage for maintenance purposes is a plus. I don't think I need a checklist as I have been pulling a trailer for decades. Am I missing anything?

I really wanted to buy this truck but now I think I would be foolish to do so.

I posted about a week or so ago that I didn’t have time to read all the pages of this thread. While I still haven’t read them all I have been through about 50 of them and that’s enough. I am having second thoughts about buying one of these trucks. All the dealers near me are in lockdown so I have time to think about it. The idea of spending this much money for something with a known problem like this seems like a bad idea. I don’t drive in the rain much and the truck would be kept in a garage. I am handy and wouldn’t have any trouble doing the Permatex fix, so I may wind up pulling the trigger. I have looked at all the trucks out there and like the Denali the best. I have mixed emotions about finding this thread.

Ok, plenty of experiences of trucks being driven with no regard to a break-in procedure. So why does GM put it in the manual? Is it a catch that they can use to deny a warranty claim?

I realize that asking any question on the internet will elicit many responses, some (perhaps many) will be strictly opinions with no basis in facts. That is ok as real life experiences can be helpful. Occasionally you get a response from someone who knows the inside scoop. I would love to know the logic behind GM putting that verbiage in the manual.

Actually it is more like $3000. To make a comparison of the deal I was offered I backed out the difference in the MSRP from the 2019 to the 2020.

I hadn't thought of those possibilities. Any of them would kill the deal for me. Same dealer has a very similar 2020 on the lot with 5 miles on it. The difference in price is $2200. It might be worth that for my peace of mind.

I'm sorry, but I just don't have time to read all 126 pages of this thread. Can someone tell me if the leak occurs while the truck is sitting still? The weather forecast is for an inch of rain tomorrow night. If so I would go look at the truck I am considering buying the next morning to see if it leaked.

I am 67 and have always bought new, followed the recommended break-in, and kept them about 10 years. I would guess this would be about 10 cars between my wife and I. I am asking the question because I can buy a 2019 1500 Sierra at a big discount, but it has 1100 miles on it. Salesman said no break-in required. When I showed him the manual he just said the owner had used it. I really doubt the correct procedure was followed. I think I would be ok with that as long as it wasn't used for towing.

Careful - it sounds like you are saying GM put that in the manual to generate revenue for the service departments!

I know that I am strange. I often read the manual for things before I buy them to be sure I don’t have any surprises. Vehicles are on the list of items I research thoroughly before purchasing. The manuals for these trucks have always said for the first 500 miles don’t tow and to keep it under 55 mph. After that keep it under 55 for the first 500 miles of towing. Over the years I haven’t come across any car salesmen who know that. I doubt that most buyers know that either. That leads me to believe most new trucks are not treated that way. The wording in the manual says it will perform better in the long run if these guidelines are followed. How important is this? What does perform better in the long run mean?

The Diamondback looks like a quality product but I think it might have a more rugged look than I want. Does anyone have experience with any of the one piece Under-Cover products?

That is not encouraging. I will have to take a closer look at that area. Is this something you can easily see? I suppose the issue could be minimized by putting the stuff I keep there in plastic bins. That way unless water leaked directly into it things would stay dry enough.

I am driving a 2010 LTZ Avalanche that I bought new. I love the vehicle and have resisted getting something newer because a standard truck doesn't have some of it's unique features. I am about to throw in the towel on GM bringing it back and pull the trigger on a Silverado or Sierra. One of the things that bothers me is the tonneau cover. Even after 10 years the only time I get water in the bed is when I run it through a car wash. I pull a boat and it is very convenient to keep some of the boating stuff in the back. With the Avalanche there is no worry of it getting wet. After reading threads on here about leaks I don't know if this is a deal killer. I do use the truck to haul yard waste to the dump and need to take the cover off occasionally so a cap isn't feasible. Is there a consensus about which cover has the best seal? If a cap is the only way to go are there any that are easy to remove?