DaveHC

Ok I contacted my dealer and told them about the popping sounds and that GM had a new bolt kit that was supposed to be used when the spoiler is removed. My 2020 was built in October 19, and under went the leak repair, so they ordered it and pulled spoiler and put back on using new kit, I didn’t see it or old bolts so don’t know what is different but my spoiler was popping a lot but temperature was hotter and it didn’t pop as much when colder. So far I have only heard a few sounds that could have been a pop but nothing at all like before but I won’t really know till it gets hot again but so far it seems to be working. I would suggest bugging the dealer to do the new bolt kit if you are bothered by the annoying popping. If they pull the latest TSB on window leaks it talks about replacing with new bolt kit.

looks right, pop off a cover on side of dash with door open, fuses on both sides and even some spares are there

check your rear window, they leak like sives on these trucks, search in this forum, over 150 pages of stories, mine leaked so bad i found out when i started up a hill and heard water moving, all carpets soaked front and rear. check your carpets

its a warning the remote is in truck with two beeps, but could beep different with the second remote inside too.

i bought a blue gel cushion on amazon for 23 bucks that works good has black cover, it sits in middle of seat between bolsters one way if you turn it sideways it sits across whole seat, and helps me alot. brand was Cclub thick egg seat cushion 22.98

Could you please tell me what size tool is needed to remove or tighten spoiler bolts, my 2020 denali with rear mirror camera pops like crazy if temp is 85 or above the hotter the more it does it, mine had the spoiler removed to fix the rear window leak, do not ever remember hearing it before that. leak is fixed so not sure i want them messing with it but i might take a look myself.

Could you please tell me what size tool is needed to remove or tighten spoiler bolts, my 2020 denali with rear mirror camera pops like crazy if temp is 85 or above the hotter the more it does it, mine had the spoiler removed to fix the rear window leak, do not ever remember hearing it before that. leak is fixed so not sure i want them messing with it but i might take a look myself.

drove me crazy in my 2019 gmc 5,3 8 speed, left at dealer overnight several times, same answer cant duplicate issue, i even paid for the trans fluid change to the new stuff but didnt help. got sick of it traded it in for 6.2 10 speed

same here has happened twice, turned off truck opened door then restarted truck fixes it, its a xm radio glitch imo

lane change alert

Update, Denali ultimate 2020, 1320 miles leaking rear window, water intrusion so bad all carpet front and rear totally saturated with rain water . After my truck being at dealer for a month i got it back, leak fixed, my leak was different it from the rear defrost wire being caught under the window frame driver side and it had a hole in sealer size of pencil according to the leak specialist my dealer used to fix it. Now the rest of the story, for you guys who think its a easy fix well the actual leak is but the problem Is if they have to replace carpet or drop the headliner like they did in mine they gut your truck, to drop headliner alone means every corner pillar front center and rear has to be removed along with the back seat. My truck doesn’t leak but the inside is scratched and scared and many parts broken like the fastener covers and line up pins on rear corner covers and on and on. My dealers tech must have missed how to properly remove and replace trim. Dealer ordered some replacement parts but I didn’t want the rest of the truck where they scratched side of dash and other places torn out so I guess I’ll live with them. I also have rattling and pops and cracks from where everything was taken out and put back in. So to me the fix is almost worse than the problem . I opened a case with GM to have it on record but as of now have not been offered anything as compensation for all the trouble or imo diminished value ot my truck. If you’re thinking About buying a GM truck I would hold off till this problem is addressed at the factory. I feel for all going thru this ordeal

from what I have read, resonators handle the drone, cans on 6.2 and screens on 5.3 do the same job of cancelling it out on the stock exhaust, most cat backs don't have them and many say no drone so not sure how it works on them.

better check the 2020 if they offer you one my 2020 denali is at day 22 waiting on backorder carpet,rear window leak repaired by what seems to be a competant expert but only water will tell

3 weeks at dealer, said issue was rear window where defrost cable went in, void in urethane the size of little finger, repaired and said no leak now, waiting on new carpet to arrive.

leaking 2020 denali, but my carpets in front were soaked rear was wet driver side and damp passenger, been at dealer 8 days so far they say they gutted interior and ordered new carpet and resealed back glass but my truck had most of the water in front and I could even here it slosh back in forth when stopping or starting off and sounded like from front rockers or under dash. has anyone had success with the rear being resealed?