I have a 2013 GMC Sierra. For the past several months I have had the same intermittent problem with it not wanting to start. Both are original keys. At first I thought it was an issue with 1 of the keys that maybe the chip inside was failing, but after talking to the service guys at the dealership they said there is no chip, it's just a key. I started using the 2nd key and didn't have any more problems...until last night. It didn't start again. I thought maybe the starter was going bad so I banged on it but that didn't help. Then I noticed the symbol and message on the dash about checking the theft deterrent system. I disconnected the battery for a couple minutes and then reconnected it to see if that would reboot everything. It didn't help. I tried using the remote start but still nothing. After dozens of tries locking and unlocking the truck and trying to start it, it finally started (about a half hour after it first wouldn't). Each time it wouldn't start over the past several months it would take 20 to 30 minutes and dozens of tries before it would finally start. I could take it in to the dealer but I'm afraid they will find nothing wrong as long as the problem is not occurring. Any real answers would be greatly appreciated.
