Question about 1996 GMC Suburban

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Gmc sub wont start 1996

I have a 1996 GMC Sub. Will not start until u put gas or starter fluid in throttle body. Then dies. I have replace battery, starter, fuel filter, fuel relay, starter relay, plugs wires, and coil. It is getting fuel and can hear the fuel pump turn on

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Your fuel pump may be at the end of it's life and need to be replaced. Your going to have to check your fuel pressure at the shredder valve, to have the engine start you need 60 to 65psi. Any other readings will not start and under 55psi, engine will not run. It's common to hear the electric fuel pump working but the mechanical pump it self is worn out and can no longer provide the proper fuel pressure for your SEFI system. Good luck and keep me posted, be glad to help get you truck running again. Auto Zone has loner tool program and they will have the step by step instructions to get the job done. 

Posted on Jul 01, 2009

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Maybe the feed gas line is clogged, its the one who makes the feeding(fuel filter connections) .

Posted on Jul 01, 2009

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It sounds like the fuel pump. You may still be able to hear the pump, but it needs to produce a lot of pressure. If it is weak it won't do the job.

Posted on Jul 01, 2009

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