I have a 2006 Silverado 2500hd it was making a horrible sound, I was told it was a barring. Then it started and died. We changed the belts and tension wheel and and another wheel. It started right up, sound was gone ran great. Went out this morning it starts then dies, no sound this time. Any ideas?
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Since you were poking around the front of the engine. Try disconnecting your MAF sensor (this is the one that goes on the air intake infront of the throttle. What happens is the truck starts and the computer tries to use the sensors to control the idle / mixture and either the MAF isn't working or there is a leak of air behind it (air getting into the engine that is not being measured). So the computer thinks no air is getting into the engine and as a results cuts the fuel (fuel and air must enter at a pretty well control ratio - no air means no fuel or rather, no measured air... no fuel).
By disconnecting the sensor, you are telling the computer something is wrong and computer goes into a computation mode were it computes how much air in thinks got into the engine and you will run. It will set the check engine light but its actually amazing how well it runs (for those that are interested its called "speed density" mode).
If that fixes the problem, examine all the rubber hoses fitting etc. and make sure everything is tight and sealed between the air cleaner and intake. I've had a torn rubber boot that killed my engine .... as in side of the road dead! Had I known the MAF disconnect trick I would have made it home at least.
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How does it die? Suddenly like you just turned the key off? Chugging and slowly dying?
by brandon k