Ok, my friend has a 2000 gmc sierra 2500. He says that once every month or two his truck starts when he turns his ignition but then kills after a few seconds and even when he hits the throttle. He replaced the fuel filter, fuel pump, alternator, battery, and the mass air flow sensor. Any of you guys know what could be wrong?

 

hmmm... ignition switch not staying engaged maybe?

 

I would have to say ignition switch too.....had two trucks come through this winter at the dealership with that same problem...one was a 1999 half ton I believe and the other a one ton, but sounds to be about the same problem these two had.

 

their is a tsb on this i will try to find out

 

love to see it. i had an old 2000 silverado that my buddy bought from me and he's been plagued with this same problem for the last year

 

the tsb is that i need to find witch pin under the steering colum the block that the muilt function switch the 7mm screw holds together.their is one pin that needs to be soder together.i will find out.

 

I agree. this connector, solder the joints. there is a tsb and think it has something to do with VAT (Vehicle Anti-Theft)

 

my friend will owe me bigtime when i fix this problem for him

 

wow, good info guys. Hope I figure this out. thanks