New 2015 GMC Sierra wont stay running, what could be causing this?
I just bought a 2015 GMC Sierra 1500 SLE 2wd, I purchased the demo
from the dealer with about 4600 miles, it now has 6,490 miles total. I got in
the truck to start it and it wouldn't stay started, it would start fine, then the
tach would slowly get less and less, the truck would get a bad vibration
along with this, the tach was bouncing around and the truck would
eventually die within about 25 seconds. No warning lights of any kind. I
could restart the truck and the same process would repeat itself. I probably
repeated trying to start the truck 30 or more times. I had to get it towed to
GMC, this was a Sunday. I went to the dealer on Monday and it started
and stayed running, any ideas on what this could be?