Hi there, This is my first post, I'm working on a 2000 GMC 3500HD Classic body style truck, chassis cab, 7.4L/4L80E, etc etc. The Security light on the insturment cluster is on, and the truck will start and run for about 2 seconds then die. I have been told by one GM dealer that the ignition switch is at fault, and by another that the ignition key cylinder is at fault. I have changed the ignition switch and the problem still exists. It is showing a P code saying that the PassKey password is not correct. The keys in this vehicle are not of the PassKey/Transponder type, they are just regular B89 key blanks so they aren't the programmable type so the password must be kept in a different location??? Will changing the key lock cylinder solve this problem or should I look somewhere else? Thanks for any help you may have. ES Butler Fleet Services Fleet Tech

Hi, Can anyone explain to me why Chrysler products take so much longer to warm up than GMs?? It seems that a GM truck with a V8 is warmed up in 10 mins or less on a COLD day, and a Chrysler with a V8 even after 20-30 mins has yet to reach 130 degrees F. Are they using weak thermostats or is it just a poor cooling system design? Thanx ES