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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29428
Experience:  GM Grand Master Technician 2007. 14 years experience.
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2004 chevy: 2500 hd 6.6 duramax wont start how to check fuel pressure

Customer Question

2004 chevy 2500 hd 6.6 duramax wont start how to check fuel pressure? got fuel to pressure check port
Submitted: 6 years ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 6 years ago.
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GM Tech (Cam) :

Welcome

GM Tech (Cam) :

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GM Tech (Cam) :

There is no pressure at that port, it is to attach a vacuum gauge.

GM Tech (Cam) :

try pumping the fuel primer on the top of the filter until it gets stiff. THen see if it will start.

Customer:

I did that already it seams to get hard but when i leave it alone for a minuite it gets real easy to prime again ? also I connected my scanner and it does not communicate with it

GM Tech (Cam) :

Ok, the pressure does bleed off, but did you try to crank when it was stiff?

Customer:

yes

GM Tech (Cam) :

What is thge 8th digit of your VIN?

Customer:

let me check Ill be right back

GM Tech (Cam) :

ok

Customer:

2

GM Tech (Cam) :

Ok, so that is the LLY. What scanner are you using?