GMC Sierra- Must Turn Key Several Times To Start

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Nancy

GMC Sierra- Must Turn Key Several Times To Start

Unread post by Nancy » Tue Nov 13, 2012 8:42 am

2001 GMC Sierra is hard to start. I must turn key several times to get it start. Fuel filter was already replaced.
I have to turn the ignition key on, listen for the whirring sound to stop from the fuel pump, i do this 3 times, then on the 4th time i can actually turn the key fully and my vehicle will start.is this a fuel pump problem?

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butchkaz
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Re: GMC Sierra- Must Turn Key Several Times To Start

Unread post by butchkaz » Tue Nov 13, 2012 8:48 am

Yes, this is most likley a bad fuel pump. Turning the key several times is basically building up pressure until it is high enough to start the truck. These trucks will not start unless fuel pressure is at least 55 PSI. Even a few pounds less, and it wont start.

To be certain, you would need a fuel pressure guage installed to check it.
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