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My son-in-law bought a brand new Chevy 3500 CC Long box two weeks ago. exactly one week after he got it (1000 miles on vehicle) it started making horrific knocking noises then shut off and would not start. Towed to dealer and they could figure it out (no codes) they drained all fuel and replaced to no avail. Called in GM engineering and they figured out one of the injectors was leaking bad and the cylinder had "hydraulic locked" Gm told the dealer to replace ALL the injectors and they hope to have that done by next Tuesday. They did give him a truck to use while his is being worked on. Anyone else had issues like this?
 

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I hope they drained and replaced the oil as well, including a new oil filter. Sorry to hear of such problem on a new truck. Never heard of it before.
 
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