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GMC Yukon XL Engine and Dash Lights
Traction control off.
Service Traction Control.
Flashing Engine Light.
Solid Engine Light.
Happens in that sequence every time.
Bought this used GMC Yukon XL truck a half year ago, everything was fine until we took long trips. I am in the North Bay, California. We took a trip to Oregon and one to Vegas. Now even 2 or 3 hour trips the same sequence happens.
First the Stabilitrack and Traction control lights then the service Stabilitrack and service Traction control, then flashing engine light, then solid engine light.
Truck still runs fine, temp is good, battery is good, oil good, handling good....
The dealership laughs at me, they said they looked at it and saw no problems; they said they had fixed it and it was not an issue. I went back out a 1000+ trip and the same lights pop up again.
I have my own mechanic look at it and he put on a “flight recorder" because the diagnostic machines /computers didn’t catch the codes.
Yet the flight recorder didn’t help much.
Also the cylinders are logging misfires, 100,000 misfires on first 2 cylinders up to 800,000 misfires on the last. Yet I am being told they dont actually misfire.
How do I stop the above described dash light sequence? (Solid Engine Light)
Any Help or Ideas are greatly appreciated. My wife drives this car and I want to assure her safety and reliability.