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: Hypertech frig up-truck wont do nuthin-! Ben46a 02-17-2005, 06:28 PM I was just installing the hypertech 300029 Into My 05 GMC Dmax, and at 63% written, It flashes the lights on and off in the dash, and looses communication, and it will reconnect, start again, and repeat. Done this 5 times. Hypertech is closed and not answering. Truck is No start, Should i call for a tow truck right now? I would like it/need it for work tommorow. Max Payne 02-17-2005, 06:46 PM Try disconnecting your batteries, and jumper the + and - of both sets of battery cables together for a few seconds.. Unfortunately, this usually will not help if the programming has already started. If the PCM remains locked, you will need to be towed to a GM dealer and have your PCM flashed as if it were a replacement off the shelf... Ben46a 02-17-2005, 06:52 PM Phew, well on the 8th try it worked- and was well worth the 7 prior heart attacks!!!!!!!!! Level 3 rules! Scotty Seelen 02-23-2005, 04:28 PM Do you have Onstar? Ben46a 02-23-2005, 05:22 PM No, Its a bare truck, i read about that in the book before hand though. McRat 02-23-2005, 06:33 PM People look at me funny when I suggest a spare ECM when you are programming your truck. They can't understand why. ;) | ||