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post #1 of (permalink) Old 04-23-2005, 03:27 PM Thread Starter
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Fuel pump shut-off switch?

I know this isn't a Van forum but being Chevy guys i'm hopeing you can help me out. My mom has a 2000 Astro AWD and the starter died yesterday so we tow it out to my place and R&R it and now it rolls over fine but no fire? Now the tow vehicle was a stick and and times the ride got pretty jerky and i'm wondering if anyone knows if these have a fuel cut-off switch? Thanks
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post #2 of (permalink) Old 04-24-2005, 08:56 PM
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Re: Fuel pump shut-off switch?

I'm pretty sure there isn't a shut-off switch. Can you hear the fuel pump running? You can try pounding on the center of the gas tank with a rubber mallet. It worked for me when my fuel pump started going out on my '96 chevy.
post #3 of (permalink) Old 05-26-2005, 05:45 AM
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Re: Fuel pump shut-off switch?

No there isn't a fuel pump cut off like Ford uses. GM uses a oil pressure switch to run the fuel pump. When you turn the key to run the computer runs the pump for 2 seconds to prime the fuel rail. once the engine is runing and has oil presure a sender closes to ground and turn the fuel pump relay on. FYI the fuel pump relay and the a/c relay are the same on your Mom's Astro.
Prob late info hope you got it going anyway
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