I got a little more detailed info from my dealer Tuesday. I had to take the thing in after an 1100 mile trip with a trailer that the truck kept telling me the whole trip it was not connected. They tested the truck and said it was ok and the issue was my trailer. Funny the trailer works fine on several other non GM trucks. Anywho I asked when would they be ready to test my trucks engine. He said I’d get a letter with a number block on it telling me when to bring it in for the picoscope test they preform. Which essentially says passed or failed. GM is breaking this all down into blocks of vins to keep the invasion of customers coming all at once to the dealerships. He told me so far they’ve tested a few and one failed in a Yukon. So I patiently wait my turn and the letter from the mother ship. Bright side of things the truck did great on the trip except for the connection to trailer issue. MPG pulling 6x10 trailer with a 400cc dual sport and a 1000cc street bike at 70 mph on cruise was 14.6 on over priced premium fuel. Which cost more than diesel now days. I even used 4wd for the first time ever in it. lol I went through a low spot on grass and buried the trailer foot into the ground. Truck spun a rear wheel and I pushed 4 hi and boom it easily pulled it out. No damage to trailer the ground was super saturated from the recent rains. Operator error on my part. I suck at pulling a trailer.
