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JFN1, ASE Certified Technician
Category: GMC
Satisfied Customers: 4508
Experience:  GM Master Technician
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I 2002 gmc sierra denali wont start cranks but wont start,

Customer Question

I 2002 gmc sierra denali wont start cranks but wont start
JA: Thanks. Can you give me any more details about your issue?
Customer: there is very little fuel pressure
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Submitted: 1 year ago.
Category: GMC
Expert:  JFN1 replied 1 year ago.

Fuel pressure spec is 55-62 psi. It sounds like you need a fuel pump.

Customer: replied 1 year ago.
Okay I don't have a fuel gauge I just pressed the fuel pressure realse valve while some one tried to start it some was coming out but just dribbles. Now I have recently started having problems with rats getting under my hood from where I live and Evil 2 through a couple wires that I have sliced prior to this problem could the rats have done something to cause it to get less fuel pressure
Customer: replied 1 year ago.
They have chewed through a couple of wires prior to this problem
Expert:  JFN1 replied 1 year ago.

No, rodents couldn't have chewed on anything that would REDUCE fuel pressure. If the pump is running, but you're simply not getting enough pressure, you need a pump.

You can borrow a fuel pressure gauge at no cost at place like Advance and Autozone.