I need to take my 04 duramax in for warranty work on the injectors, and it has been tuned using a hypertech programmer. I connected my hypertech programmer to the truck to return it to a stock tune, and it has an internal problem with the flash memory. I called hypertech and they told me that the programmer was broken and would have to be replaced at a charge of $200. I have a hp tuner that i use on my trans am and was wondering what is involed in returning my truck to a stock tune before i take it in?