dbn93

OK, here is my predicament..... I have a 2009 Sierra... same situation as yourself.. lost the last set of keys for the truck. I called around and realized it would cost no less than $300-400 for a new set of keys from dealership or mobile locksmith(towing to dealership included). I read online that it was possible and simple to buy a blank and program it myself. So I purchased a transponder key and fob for a total of $55 from keylessride.com. I was following the (3 x 10) programming instructions as provided with my purchased transponder key, the first 2 steps went flawlessly. Blinking indicator went out after 10 minutes and I repeated the process again... However, on the 3rd time through the steps my battery gave out and died. Now I am stumped..... I fully charged the battery and tried the process over, however the indicator will not shut off after 10 minutes. I've contacted keylessride and they are out of ideas as well. They are telling me my vehicle is in some type of "lockout mode" and the computer needs to be reset. I have noticed the "Service Theft Deterrent System" now shows up in my DIC. I've tried: - taking battery cable off overnight - taking batter cable off with fuses (4,5,12,56 - ECM fuses) for 1 hour - taking 4,5,12,56 - ECM fuses out will key is in "on" position I cannot figure out how restart the computer or if i'm even in the right area to fix my issue. Any insight would be greatly appreciated. Thanks