LSPowered65

Fog lights have to be off

The day I drove mine off the lot it threw a code for a sensor in the exhaust, it was replaced 2 days later. This was late February. It has always driven the same way in regards to its downshifting for speed control. It will do it in normal mode if i am repeatedly on the brakes. Happens much quicker in tow haul.

Mine was built 12/19. It doesn’t do that. My grade braking doesn’t come on in normal driving unless I’m really on the brakes. In tow haul it activates much quicker. Maybe you aren’t getting a response because others aren’t having the same issues as you.

Out of stock and price went up. https://www.ebay.com/itm/193137250862

Tech heard a squeak on test drive, they ordered front and rear pads for it.

Just the tip..... Less than $40 on eBay. They have polished on there also.

Mine went in today for complimentary oil change and tire rotation. I have a little over 6k miles. I let them know about the noisy brakes and tech bulletin. Service adviser asked me if they do it hot or cold, I said mainly hot. Mine get substantial worse after unhooking from my 24’ enclosed trailer. I will let you guys know what they do later today.

I buy them from EBay, you can get a set of 4 for very little money. They work great, run them in my trailers and other car that has 2 full sets of wheels.

I miss the double decker door storage, lane keep and my auto wipers from my 2018 1500 Denali, pretty much miss the whole interior of that truck.

Make sure it’s fully closed, I have a GMC multipro and if it’s not fully latched it won’t open, won’t even try to open. I have to push it in and make sure it’s latched fully, then it works fine.

Looks like the end date for Bulletin #20-NA-020 is September 1st of 2019 production. Mine was built in December of 2019 and the brakes squeal, sounds like only the fronts, 5,700ish miles and has been doing it for the last 5-700 miles.

Unplug everything from all of your USB ports when you shut the truck off and keep them unplugged until after you start it. Give that a try

I run generic 433mhz sensors in mine, never had a issue. Less than $30 for all 4 on eBay. Maybe some states use a different metal for their license plates. Do you have a metal trim ring on yours? Try taking it off if so. Does your state offer/make plastic plates? I also have a TPMS relearn tool, makes GM tire rotations a breeze and is helpful with the trailer tpms now that I have them. EL-50448 tpms relearn tool, was $8.50 on ebay.

I’m sure it is, You just need the memory card that goes in the center console for a Middle East map or any region you would want for that matter.

I have had similar issues. Make sure your iPhone isn’t plugged into a usb for short key cycles. That seemed to be my issue. I make sure my phone is unplugged on short key cycles and my audio always works again on restart. The truck does a full power cycyle after 5-10 mins between keycycles and driver door open and close. Try that if it does it again for shorter remedy.

I have a 2500 AT4 crew cab, 6’9” bed with the 5th wheel package, not sure about snow plow prep, I would have to check the window sticker.

Mine has the shutters, 2020 GMC AT4 with a Duramax, you can see them behind the grille. I had to extract a extra push pin fastener from mine, also found one in the hood scoop drain, someone must of felt generous on the assembly line that day. That or my truck is falling apart....

This may help you guys. I have had mine for a week. 2020 GMC 2500HD AT4 Duramax. I couldn’t figure out why between short key cycles I would lose all audio and everything in the IC screen expect for the main info page with speed and trip etc. nav, audio, phone all blank. Center stack screen shows me that the Sirius radio is on and the songs change but I have zero audio, no audio for Bluetooth or apple car play either. I tried key cycles, opening and closing door etc....  WELL....its apple car play. On these short key cycles I would leave my iPhone plugged into the USB port. Drop my kids off at school and come back out to no audio. Now when I have these quick trips I make sure I unplug my phone and everything functions like it should. It takes 3-5mins for it to reset with truck off and door opened if you do leave it plugged in and this happens to you. I let my dealer know of the issues I was having but plan to call them today and let them I know I figured it out. Clearly they wouldn’t of had these issues if I dropped it off to be looked at. Maybe this works for you. Good Luck

So this thread is pretty depressing to read. I am the new owner of a 2018 Sierra Denali with a 6.2. Bought it new as a leftover with 300 miles on it 2 weeks agog I have almost 600 on it and have made a laundry list of issues for the dealer to tackle. One of them being a significant vibration/shake at highway speeds and the front outer edge of the tires look like shit, you can feel the chop in them if you run your hand over them. Bridgestone A/T. To get this much chop in less than 600 miles means the alignment has to be out pretty significantly. I traded in my 03 Sierra Crew quadrasteer that drove like a dream.....yes, second thoughts are upon me. I don’t drive the truck much, less than 5k a year but I shouldn’t be having these issues with a brand new $66k vehicle. I’ll keep you posted for dealer solutions to my list. I am open to ideas but I will start with alignment, rotation, tire balance for the vibration.