Just wanted to comment on this thread. I have about 7k on my truck after about a year. Drove it today. Got home and noticed I needed to clean my floor mat. Took the fronts out and sprayed/wiped them down. It had gotten dark by the time they were dry. Put them back in the truck. Went out about an hr ago to pull the truck in the garage. Pressed the button and just constant starter but no start. Tried about 3 or 4 times. Came inside and jumped right on the forum. On the first page I read the OP’s post about the floor mat. Went outside and sure enough I had covered my gas pedal with the GM mat. Moved the mat and it fired right up. I know EVERYONE isn’t covering their gas pedal, but could there be an issue that is replicating the engine being flooded or whatever is happening when the gas pedal is held down for a period of time?
That being said, even though my problem was caused by me, it wouldn’t have been an issue if GM WOULD PUT SOME DAMN LIGHTS IN THE FLOOR so you could see!
Also thanks for people posting on the forum because it definitely saved me an embarrassing tow to the dealership.