Parrish Mooneyham

Yes sir, I believe you are right, crooked 'GUIDELINES' . It's absorbing in darketh head now... hehehe.. Thanks for the clarification. I have informed my service advisor and she's looking into it now.. She's pretty open to things like this. I'll definitely post back when I follow with her in the next day or 2.. Thanks again.

Ya I forgot to mention that... i.e. refrigerators and AC units and even power saws etc... so ya what Davester stated... there are tools the require what they call 'starting watts' vs 'running watts'. My apologies for forgetting that crucial bit of info. After getting into that for trying to figure out my home wattage usage for a portable generator connection, for example, my home fridge is a 400 watt 'running' watts but to kick it on takes 1200 'starting' watts.. So ya.

Hey odarevliS, keep us posted, I just called my service advisor to follow up with this. I have have the same issue with my 2020 1500 Crew Cab since I bought it.. So at 0 miles this was crooked. I will also post back with whatever happens with my service advisor/information.

a little late but just to figure out how to calculate your wattage usage... 120v X <your appliance Amps Usage> = Wattage... i.e. https://www.harborfreight.com/air-tools-compressors/air-compressors-tanks/1-gallon-135-psi-ultra-quiet-hand-carry-jobsite-air-compressor-64592.html 2.8 amps of usage... 120 X 2.8 = 336 watts. Less than 400. So I should be good. ;)... hope this helps..

Ok gentlemen, SO sorry for the delay, my apologies as this is going on a couple of weeks now. BUT, once this was verified that this WAS a result of bad programming, I was also made aware of that cylinder #8 failed leak down test and had to be replaced.. ON TOP OF THAT, i kept telling the dealership there is something wrong with the radio and that way it handles the USB Music and Playlist.. Basically, when playing from a Playlist (mind you this is a NON HD-Radio but still the 8" screen), and you stop the truck, leave vehicle, let vehicle fully shut down, re-enter vehicle and start it up. The music will not play and the playlist filename is found but it doesn't show any of the songs in the list. I thought "OH H#LL NO!! NOT AGAIN WITH ALL THE ISSUES!!!". SO, I verified this was a true programming/radio issue as I have since traded that double cab in for a crew cab with more upgraded options on it that I wanted from the beginning.. In this new gray (steel color) truck, the playlist plays just fine even after turning off and back on the truck. Acts like you would expect it to. To start playing where it left off and has NO issued with re-loading or keeping the playlist loaded. SO YES!!!, I traded that truck in for a new(er) one due to all the issues encountered above. Although, I didn't realize it but it was another Loaner Special, but I don't care as long as the truck runs like it is supposed to. ;). Good luck to all who having to keep their trucks and I truly mean that. This truck will be my last and I'll deal with any issues that arise from here on out unless someone else does something stupid like total my truck ;)..

wow, never new that existed thanks for the info..

Hey Bamorris... where did you go to get that information for that TSB? A GM website?

Hey BAMORRIS.. that is EXCELLENT information.. I was almost certain the developer(s) screwed something up!!!!!!!! They need to be SLAPPED for that crap.. ;)... I mean crap like needs to be THOROUGHLY tested in a few different models. Trucks with OEM BrakeCotroller, Trucks with aftermarket brake controller, Cars, SUVs etc... I mean come on, I'm SURE GM has a few spare vehicles around to test this out before putting into production!!!!!!!!! AND I bet if you put those developers in the vehicles they updating the software in, I BET you they'll do a better job because now if they screw up on it, THEY are the one being the crash dummy in the test.. hahahahaaha. Thanks again bamorris for the info.. that helps a TON!!!!!

Hey Chad, wow dude, that is seriously severe, don't blame on not driving it.. Just a quick observation, it looks like it only jerked as you were turning the wheel. The all electric rack and pinion I know draws a lot of electrical juice, it could still be something with grounding or even a positive power wire supply line not supplying enough juice due to maybe some resistance somewhere??. Not sure. That is only my novice observation. That is something that GMC dealership should be able to troubleshoot as long as it keeps doing that. Whether it's a copper wiring issue (either positive or negative or both) or a control module issue etc... I know this isn't much help but those electrical Gremlins are a bear to figure out sometimes.