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Comments
I was thinking I might have hosed the battery driving it back home after the original alternator went south. I have a life time warranty on the new alternator so maybe I'll give that another shot before I replace the battery.
Service adviser mentioned the h. core is located on the driver's side of the truck(?) thought they were closer to the passenger side-says it's a bit involved to remove & replace. Good thing for the warranty.
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Chevy Silverado/GMC Sierra Group
Try this... take off the air cleaner housing and dump a small amount of fuel into the injector assembly just like in the old days of carbed vehicles. See if the truck fires up. It shouldn't take much - you don't want to flood it. I would think (I may be talking out my butt here but...) that if the truck fires right up than it could be the fuel pump.
I am sure that dumping gas down the fuel injector assembly should work as I one time helped a couple of people stranded in a late 90's model Chevy with a 5.7 that had a fuel pump fail. They were limping along pouring gas down the fuel injector assembly and driving till the truck ran out of gas. Then they would repeat and keep going. I towed them to a shop in town (they still had 30 miles to go!). The 4.3 even in 2000 is not much different than the late 90's 5.7. It's just missing a couple of cylinders.