CaptKev

I had a similar problem the first week, same truck with 22's. I brought it back to the dealer with a couple hundred miles on it. They found 1 tire out of round and road forced the rest. After they swapped out the tire and balanced it's been great. I will say that it does smooth out over time also. I went and bought new OEM 20" wheels for snow tires and went through 2 different sets of snows and could not get them to stop shaking over 60mph. Went back 5 different times for different types of balance techniques and in the end took them off and put the stock 22's back on!

Put on the FAC G4 cover today! Fits mint, i really like it. Also put in the Pop and Lock power tailgate lock. I still can't believe i had to buy it aftermarket, i came from an Avalanche where it is standard equip! Here's a few pics, only 156 miles on it!

I was thinking this when i hit the flapper and it started right up, that it made no sense that the flapper was the cause. So now i'm waiting for it to happen again.... maybe it is the starter, guess i won't know until it shows its ugly head again!

Ok, left the truck at the dealer overnite outside (4 degrees), got there at 7am, hit the remote start and she fired right up! The service guy said they bolted the butterfly in the flapper valve in the open position per GM engineering. This is a temporary fix until a permanent fix can be found, also per GM engineering. I am hoping this takes care of that problem, although i still don't understand how that flapper could be the cause of the truck not starting. There are no wires to the flapper nor could i see any sensor? The truck never turned over at all, so how does the engine know not to start from a mechanical butterfly valve so far away from the engine? When i went to start it there was a click (not a starter type click) coming from under the dash area and then the cluster went black. Just don't see how the thing works. Any insight on that thing? Anyway i'm glad to have the truck back, and hopefully with no further problems! Kevin

Really? a hammer fixed it? we never heard of this problem? we'll investigate it while we install your bed mat and give you an inspection sticker. I made them keep the truck overnite and i will meet them first thing in the morning to start the truck. It is being left outside tonite and it is going to be 2 degrees in the am. We'll see if it starts..... I'll post back with any progress tomorrow

The starter never engaged, there was a quick click inside the passenger compartment, maybe behind the dash and then black screen.

no, one click and then the cluster went black

My truck is new(79 Miles on it) got it yesterday, today 0 degrees, would not start. Got out the hammer and wrapped on the exhaust and it started. There is some kind of exhaust flap i read about here that has been causing issues! On my way back to the dealer now! Not Happy