Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner past midnight.
The symptoms you have described are not that of a stock vehicle. This sounds more like someone has added an aftermarket alarm, immobilizer, or remote start to the vehicle. I would begin with disabling that system to see if the OEM system takes back over and allows the vehicle to start and run correct. Can you try that?
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It appears the dealer installed an aftermarket system in addition to the one the truck already has and then turned around as sold it to you as a highly marked up security system. On your remote fob should be a name brand of this system. If you can get me that, I can go to that website to get you the install directions which you follow backwards for the removal directions.
Hello again Chris here,