Has anyone ever run into problems with a 1998 GMC Extended Cab truck where the vehicle will start then stall, the security light will flash and then immediately go out. I have tried the relearn procedure where you bump the stater and the wait 10 mins...I have repeated this process 3 to 6 times with no results. This problem all started after I replaced the transmission in my truck. I left the key ahead while I replaced the transmission as I had left the truck in neutral in order to roll it back and forth to get it on the car lift. The vehicle ran fine before I changed the transmission as I drove it in the garage with the transmission slipping. Shut the truck off and left the key turned ahead. Removed the trans, rolled the vehicle outside as I was working on it after hours in my uncle's shop. Rolled it back in a couple days later installed the replacement trans. Discovered I had left the key ahead all this time and the battery was dead. Hooked up the battery charger, tried to start the truck and it would start and die and the security light would flash for 5 seconds and then go out. Tried the relearn for 3 times 10 mins and 6 times 10 mins with no change. Anyone have any suggestions? Another interesting thing is the truck will run when I installed a computer for a 97 suburban and it will run, but the computer is unable to be read by a Snap-on Solus scan tool. I don't have a lot of money in the truck and don't want to replace parts randomly...anyone have any knowledge of this system that can point me in the right direction?????
Thanks for your time!!