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Discussion Starter · #1 ·
can anyone tell me what the vacuum would on a good vacuum pump just want to change my pump to see if its working right. i had to do a emission test and it failed and the mechanic told me to check what the pressure on the pump, it would make the turbo not work right.
 

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need more information on your truck. is it a 6.5l or a Duramax?
 

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Contact Bill Heath of Heath Diesel Performance He will send you in the right direction! I'm not in a good position to answer your question right now. I'm having some issues on my own. But you should not be waiting for an answer either.
 
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