2000 GMC Sierra Fuel Pump Quit

Tiny
COOLCAMARO79
  • MEMBER
  • 2000 GMC SIERRA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
I have been diagnosing a problem with this truck all weekend. I thought my injectors may have been bad until I read a post on here that said the poppet valves need 50 psi or more of fuel pressure to operate. I hooked a fuel pressure gauge on my schrader valve and found 12 psi. My pump was also making some rough noise. I changed the fuel filter to rule out that being a problem and found I was still only getting 10-12 psi when cycling the key on and off. Then the pump quit all together. I get no pressure and no noise when I turn key on. I am pretty sure the pump is shot. If anyone has any other suggestions I would appreciate it. I did check all the fuses, they are good. Also, I have noticed there are 2 types of fuel pumps for this truck, one with EVAP Emissions and one without. Any way of telling which I will need before I drop the tank?

Thank you.
Ken
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Monday, February 2nd, 2009 AT 6:25 AM

3 Replies

Tiny
BMRFIXIT
  • EXPERT
Suspect fuel pump for sure
check the connector and wiring harness before mounting tank back
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Monday, February 2nd, 2009 AT 6:47 AM
Tiny
COOLCAMARO79
  • MEMBER
Thank you for the quick response. I am shopping around for the pump now. I am not sure if I need the one marked "With EVAP" or "Without EVAP". Do you know of any way I can figure out which I need?

Thanks
Ken
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Monday, February 2nd, 2009 AT 7:10 AM
Tiny
BMRFIXIT
  • EXPERT
Check the module code
removing the tank and check fuel module code and look for the evap or not
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Monday, February 2nd, 2009 AT 4:37 PM

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