JKD

Could have been something leaking from a truck and the vehicle in front of you kicked it up, kinda like how wet roads leave a film on the sides of your vehicle but not the hood or roof so much. I agree with OnTheReel, need to clay the truck before the sun cures whatever that is. From your description, sounds like paint. Get a bucket of soapy water (heavy soap) and clay bar (I like to use synthetic clay). Griot’s and Mother’s both make synthetic clay and available at local auto parts store. Do a 12” x 12” section at a time keeping the panel and the clay very soapy. Rinse and repeat until that section is free of the overspray. It usually doesn’t take that much elbow grease, let the clay do the work...don’t press too hard and use up and down, not circular motion. Once finished, wash the entire truck and apply a good coat of wax/polymer sealant. This not only protects the paint, but will make it much easier to remove bugs, tar and future overspray. Good luck. Zaino Brothers website has some great clay bar techniques and advice if you care to check it out. No, I’m not soliciting business, just some good techniques I found on the site a while back.

I can’t believe this issue is still going on. I was one of the first. I was absolutely livid that my $70K 2019 Sierra Denali began leaking at the rear window. My heart goes out to all who have been affected by this defect and the myriad other issues. There’s nothing worse than having a brand new vehicle with problems. I’ll list mine in order: 1. Rear window leak 2. Infotainment glitches a. Infotainment Climate control intermittent malfunction b. Can’t find Navigation SD card c. Blue screen for reverse cam 3. Anti collision braking not working 4. Brake life indicator counting down too quickly 5. Passenger side mirror not folding in completely 6. Intermittent loss of side view camera image 7. Slight shaking at highway speeds 8. Driver side front window auto up stops half way and goes back down (really annoying) 9. Passive door locks sometimes don’t work 10. Horn chirp is muted (Sounds soft and weak) when remote arming security system i think that’s all ? Oh!...and now none of the driver assist features work after the latest front camera software recall (N192275630) performed by the dealership today. No lane assist, no pedestrian braking, no forward emergency braking. I love the way this truck looks and how it rides (except for the occasional shaking at highway speed - which is intermittent), but overall disappointed in GM’s quality control. Most of these systems are not new technology so this isn’t first model year issues, with the exception of the rear window leak.

There is a technical bulletin 19-NA-191 that covers this issue, but the latest software update (reflashing the ECBM) performed under the following recall should solve the problem: GM Recall #: N192268090 NHTSA # 19V889 Date Issued: Dec 12, 2019 Just make sure the dealership resets the brake life indicator to 100%. My truck had almost 15K miles on it and the dealership just performed today. However, if this is in fact an algorithm and not actually sensors then I’m afraid this is just a bandaid for a useless feature. Ultimately and fortunately the brake pads have the age old wear indicators that will squeal when the pads get too worn, but it’s still nice to see the DIC not telling me I have only 14% pad life left after 14K miles, even if it really means nothing because this is a ridiculously useless feature. I’d rather have the sunglasses compartment by the map lights (that couldn’t hold anything larger than a pair of aviators) than this stupid brake life indicator. Lol

Ian, I’m a fan of the square tips you show in the pics. This body style has some sharp transitions that would be complimented by the square tips better than the round tips...in my opinion.

Same for me. The dealer closest to me has a bad reputation. I go 30 miles out of my way in horrible traffic for the better service. Just can’t take any chances. Oddly enough, that’s how these dealers make money; service. They do well on warranty service as well so it baffles the imagination why in the world they wouldn’t want to keep a customer happy. Laziness???

Demon, that’s one badass looking truck!

Sorry to hear of another GM customer experiencing this leak issue. I have to admit, I was very upset about it. However, GM did fix the issue and no further problems. Can’t say the same for other makes I have owned. Hang in there, I’m confident they will get yours right also.

Got mine back Friday 21st of December and no leaks after the replacement rear window. GM is placing the affected vehicles on a numbered list based on time of report of leak. I was one of the first reported cases and it took 39 days to get my truck back. Depending on how many are in front of you, it could be quite a while judging from my experience. As outrag 1 stated, be loud, but be civil. I would remind the dealership to do everything in their power to make you happy since 1. GM is paying for the repair and loaner vehicle and 2. They may like your repeat business. Also, be sure to get it on the record with GM Customer Service. Water damage is no joke, so be sure to let the dealership know that you want to inspect the truck, while they have it torn down, for damage. They will have to remove the rear seats and seat backs to replace the rear window assembly. It’s a perfect time to inspect for rust, mild and mildew.

No, thats definitely not a good sign. Got mine back after 39 days at the dealership. They replaced the entire rear window and headliner. The fix survived a direct pressure wash today, no leaks. That being said, I wouldn’t buy a new one unless it was certified leak proof. Evidently GM has a new manufacturer for the rear windows. Also, I know of two others locally with 2019 Sierras and no leak problems....yet.

Yes, I agree about the first model year, but they haven’t reinvented the proverbial wheel with this iteration. I hope this is the first and last issue with this vehicle. ?

MTsound, sorry to hear you are having the same problem. The unofficial word is that the problem is very widespread and GM has fired the original manufacturer of the rear windows for 2019 Silverados and Sierras and has hired a new manufacturer. It has been 37 days for me without the truck. However, I’m pleased that GM has taken the steps to ensure the issue is corrected permanently. Among many questions, one stands out: When will a recall be issued to save loyal customers from the potential vehicle damage from a leaking window?

But why does it happen? Shouldn’t be from too much air flow.

It’s now been 30 days the truck has been at the dealership awaiting repair. Unbelievable.

That’s great Demon! My location “must be a geographical oddity...two weeks from everywhere” for my truck’s parts (to quote “Oh Brother Where Art Thou”)

Lol, because of an air filter? Does the trans work off of 1950’s vacuum technology? What a bunch of bull! Show me the science where increased airflow causes shifting errors. No, the real problem is subpar programming. The ECU should make the proper adjustments for airflow and density. The six speed trans in my 2016 Canyon was just OK, and you had to feather the accelerator or the engine would just rev and it couldn’t seem to find the right gear when traveling between 35 and 40 mph. Look, all makes have issues. I’m not bashing GM alone for having issues, but they just need to acknowledge and fix them without the smoke and mirrors routine.