T_ClarkEx39

Thanks for that! I'll check it out. My everyday non towing temps in this Ga heat right now are 155F-165F. Towing my boat this past weekend i was around 180F.

What is this pill flip? Never heard of it

I get that. I went thru automotive school in the late 70's (got tired of working on other peoples junk), then became a construction electrician. I built race cars back in the day, and from age 40-55 road raced motorcycles all over the SE U.S. building and maintaining those as well. I'm very aware of what kills transmissions. The rear end was just serviced about a year ago and the 4wd was serviced at 80K. I just screwed up and never did the transmission on this truck (traded in a 2003 D'max i owned since new at 350K for this truck, and because the Allison transmission was so easy and convenient to service, it got a new filter and fluid every 3rd oil change or approx 30K miles). Having said all that, yes, I'm a dumbass for not servicing the tranny on this truck. At 62 years old i don't feel like climbing under the damn thing anymore (haven't for many years), so I was going to let my dealer do it when they told me about this issue. Since then have spoken to a couple of others that have said the same thing. Hence why I am asking the question here.

interesting. i might jinx myself, but this truck doesnt leak a drop of anything and never has. (knock on wood)

So, i purchased this truck new in July 2017. Been a fantastic truck other than the crappy fuel economy that is typical of the 6.0 motor and the 6 speed transmission. It had a few hiccups that were covered under warranty including a "service 4wd" code that after 5 trips to the dealer they fixed (and still dont know what they did to fix it). But, here is my "dilemma". The truck has 135K miles. While i have religiously always done oil changes, ect., i have never done a transmission service. Ive had more than one person tell me that these trucks with this transmission that if it hasnt been serviced by now, NOT to service it as it could possibly start faulty shifting. Even the dealer where i bought it said that if i bring it to them to service, they will do it but cannot warrant that it wont start acting up. Is this true? Fluid is still full and still nice and pink with no burn smell. So should i just "leave it be" from now on and just add transmission fluid if it ever needs it or what?

Correct, my high beams are separate. Looks like I'll probably go with the 55W HID'S.

honestly surprised no one else has any suggestions. Thank for your input carpartsman.

OK, ive sat for the last hour, gone back through almost 20 pages of threads looking for info on this, and its been hit or miss at best. Ive got a 2017 2500HD, LT package. It has the halogen projector headlights, which absolutely suck. My wifes stock headlights in her 2010 Rav4 put out more like than these things do. Is there an LED that can plug directly in and actually put out better light? Are HID's a better option? After 2 years and 50,000 miles, im ready to trash these crap headlights. Suggestions? Links? Pics?

Crutchfield is your friend. www.crutchfield.com

They've replaced the module and the harness, still happening.

nope. As a matter of fact, it went back to the dealer just 2 weeks ago for the same thing. At least i got 6000 miles between the last time it happened and this time. The one thing about it happening this time tho (service 4wd and stabilitrac as well as cruise control not working), is that THIS time, it came on everytime i cranked up the truck. I could "dismiss" it, turn off the truck, turn it back on and it popped up again. I "thought" this was a good thing, because my dealer told me the same thing yours did, it needed to be happening constantly for them to see the code actually appear in order to figure out the problem. Well, AGAIN, they cant figure it out. They cleared the codes, pulled apart the connector that supposedly controls that system, coated it with die-electric grease thinking it may be getting wet and sent me on my way. Again, this was time number SIX for the same problem. That day, i contacted GM's lemon law division. They agreed that something was indeed wrong and asked me exactly what "I" wanted them to do. I told them this and in this order: 1. FIX MY TRUCK. I have no desire to go through the pain in the ass process of lemon law procedure, and if they could come up with a DEFINITIVE reason as to why this was happening and a DEFINITIVE fix for the problem, then i just want it fixed and be on my way. 2. Replace my truck with the EXACT same truck except a 2018 model. I bought this truck brand new with a full warranty and i would expect to get nothing less as a replacement. 3. Full refund of everything i paid for this truck (extended warranty, plus my trade in vehicle money) so i can go find my own new truck. Since #1 is my first choice, and the problem has been attempted but no resolution from the SAME dealer (which has been in business for over 40 years and is one of the better chevy dealerships in ATL) six times, they asked that when this problem happens again, that i take it to another dealership for a "second opinion". I agreed to that, with the caveat that they only get ONE SHOT at finding and fixing the problem. If the 2nd dealership cant figure it out, then i at least have the lemon law process started and we can go from there. As i said before, i love this truck. other than the crap fuel economy of the 6.0, its a fantastic vehicle, nicest truck ive ever owned and there wasnt another one like it within a 500 mile radius of me when i purchased it. Its just hard to find a 2500 "GAS" truck that isnt a fleet or "work" truck. This is an LT model and has MOST of the options an LTZ does minus a few items that i really didnt care to pay the big $$$ for extra. If it wasnt for this little nuisance bug, i would say this is the most dependable truck ive ever owned. Hell, From the day i left the dealership, it was 14 months before this happened, and it was the FIRST thing and only thing that i can complain about. There has been zero times back for warranty work till this. VERY frustrating to say the least.

Seriously????

I will have to check that out. I never use that 110 volt port so it may or may not be working I wouldn't know

Ugghh, figures. They've already replaced the harness on mine and its still doing it. I will say, mine doesn't happen every keystroke, it waits about every 2 to 3 weeks before it decides to come on once I dismiss it Thanks

have you ever figured this out on yours?