blackout881

I have a 2019 Sierra 1500, Bilstein 5100's and airbags in the rear. Towing about 6500lb-7300lb (sometimes with water tanks full which is horrible to do but needed sometimes) 26' Jayco. The airbags made a night and day difference, i even didnt use the weight distribution hitch a couple of shorter runs set about 35psi. I would not go any larger than 26' with a 1500. Wind definitely wiggles you around a bit. If youre towing long distances id stick around 20'. I only tow to my private property and drop it about 60 miles each way twice a year, and to a couple state parks twice a year. I also tow a 19' equipment trailer with a john deere 3025, that tows great. Ive been itching to upgrade to a 2500, but ill just push the 1500 now until I have a problem as its almost paid off.

My last dodge truck before this, heater core went at 65k miles. I tried flushing it at the dealer, then flushing the core myself with CLR. They wanted about $2800 to replace with taking the dash out. I couldn’t accept that and got rid of it. I guess I can accept a grand for a bad wire I could never find myself. Still sucks.

Started with fuses and relays, just basic if they are blown or operating. I wanted to replace the FPCM blind just to throw parts at it but Everything else in the truck was ok electronically. I had a friend that is a tech scan it in my driveway (after I scanned and got 16 codes). He said it’s something to do with the power going into the fuse box after multiple TSB’s showing up. That’s when I brought it to the dealer. They did a great job and documented it in video. I do have to say even though it’s a steep price they did take my entire harness apart and repair multiple wires, and had a 30 year GM vet do it. He promised he sealed it better than factory in that area. I hope so, I really like my GM vehicles now. Recently switched over from ford and dodge. Looks like every brand has their issues.

Here is the outcome.. I would have never found this. Has anyone else had corrosion in this area? https://app.truvideo.com/v/jPhaCKRS?s=qc2fUg+2+dCFXPz4zRYWefJHv50JVRO0

example… my neighbor has the same truck as me.. before I bring over a 12 pack and ask him if I can test his part to ensure it’s what’s wrong with mine, I’d like to know if it’s plug and play. Also do not want to mess up anything with his truck, so don’t even want to ask lol.

Very hard part to find. Any list of inventory at dealers within 2 hours from my house every one I called it is spoken for. Ordered one on eBay and the seller wrote me a message and said it will take a month or so to get to me, so I had him cancel the order. I do not know what I’d be doing if I didn’t have a second car. can anyone answer me if this is “plug and play” or if it needs to be programmed to the truck? I’m reading mixed things. Seems like older models need to be programmed, but I read some people with newer models say it’s plug and play. Anything else anyone can recommend I try while it’s sitting in my driveway? If it were not the module… I tried shifting around through the gears incase it was somehow not fully in park, disconnecting the battery, charging the battery, cleaning terminals. It’s just very upsetting that my first truck I bought new and meticulously maintained and serviced is dead in my driveway at 55k miles. I was in love with GM until this, in 25 years of driving this is the first time I am stranded with semi-quick solution and honestly it’s making me want to sell it and just buy a old diesel with 150k miles for towing. At least when that breaks I wouldn’t be mad lol

Just got to scan it and its throwing 16 codes. p1682, p16a7, p16bc, u2084, u0146 u0100, u0101, p0689, p1682, p16a7, p16af, p16bc, p16bd, u0284, u1345. So now I am thinking something in the battery is going haywire. Might just attempt a new battery and checking the ground cable connection. Has anyone had this issue???

There doesn't seem to be a single fuse or relay for the fuel pump. If there is, can someone tell me which it is because its not in the manual or on any of the 3 fuse panel diagrams. I have a spot for "second fuel pump" which takes a relay and is empty, but nothing says fuel pump. I find it hard to believe myself, id like to hope I'm stupid but it seems it does not exist in my 2019.

Hey all, Been a while since I've been on this forum, probably a good thing! But today I went out to start my 2019 5.3 Sierra with 55k and it just spun and spun to the point I was panicking to push the button to get it to stop. Ironically enough, the last time it was driven was one week ago to the dealer for routine maintenance. Also stopped and filled up the tank on the way home...So truck has been sitting one week in below freezing temps. I put a charger on the battery and confirmed voltage was good. Also beat on the starter for the hell of it. The main symptom I can immediately notice is when you open the door, there isn't that "jet engine" like sound of the fuel pump priming. So I am thinking its fuel pump related, or I got bad gas and it froze up in the temps here in NY right now. Has this happened to anyone else? I do have a second car (Bolt EUV) although my commuter its not what I want during the winter snow, I need to get to work no matter what. Any way you guys could help me in my driveway without having it towed to the dealership would be great, I don't mind getting my hands dirty. Thanks!

I also had this problem... but my settings were correct. If you hold you lock and unlock button for 5-10 seconds it will also do this and drive you crazy!

I suppose confirm you have the SU4 axle before you waste time bringing it into the dealer.

I had this in my 2019 1500. Mostly in hot temperatures after driving on the highway for about 20-30 minutes. Enough to drive you crazy. Documented it with my dealer over the course of two years or so while GM researched the complaint. Finally they had a TSB to fix it in Feb 2022. I think I have one of the first ones to have it done, as I did it RIGHT when the TSB came out, and completely solved the problem. Link below. MC-10208978-9999.pdf (nhtsa.gov)

I was wondering if there was anyone that had access to GM's vehicle locator. First time ordering new here. Vehicle was in Buffalo, NY about 4 hours from me with a ETA of 10/23 as of this past Monday. Fast forward to Thursday, dealer is now stating its in Missouri. Thats a little concerning... If you can help and track my VIN, please shoot me a PM. Thanks!

Had mine done first week of May. So far so good! That noise was enough to drive someone crazy on a long trip.

Dealer had my truck for 2 days. Drove it a total of 90+ miles and could not duplicate sound. They were stumped because I sent them this video as proof... They are an awesome dealership and do everything to help me out so cant wait to go back to them with this TSB. Here is the video that captures the sound pretty well, I notice it most on hot 80-90 degree days after driving for about 30-45 mins...also tested pushing 4wd auto and it goes away. Has anyone had this successfully fixed?