2001 gm ls fuel pump?

[gmurrayjr]

2001 gm ls would nt start . Noticed i couldnt hear fuel pump when turning the key . put in new fuel pump relay and i could hear pump and it started. 3 starts later it wouldnt start . Fuel pump not working with turn of key . Changed relay again and still wont work . Is it my pump finally done?

[gmurrayjr]

Originally Posted by gmurrayjr

2001 gm ls would nt start . Noticed i couldnt hear fuel pump when turning the key . put in new fuel pump relay and i could hear pump and it started. 3 starts later it wouldnt start . Fuel pump not working with turn of key . Changed relay again and still wont work . Is it my pump finally done?

This vehical has 50,000 miles on it.

[way2old]

First check all fuses. Then check the inertia (fuel cut off) switch in the trunk. You can use a test light to see if the switch is sending current to the pump. If there is current coming out of the switch, it is a good bet the pump has failed.

[gmurrayjr]

I checked the fuel rail and no pressure. I checked voltage at the inertia (fuel cut off) switch in the trunk, it had 6v. Im confident now that the pump has failed. I will let you know after change out. Thanks for the help.

[way2old]

If there is just 6 volts at the inertia switch, there is a voltage problem. There should be 12 volts coming in and 12 volts going to the pump.

[gmurrayjr]

Ok , so now im at a loss as to what to do next.

[way2old]

Check where the current comes from that feed the inertia switch. You may just have some corrosion on a connection somewhere. Does the switch have 6 volts on both sides or just the side to the pump? if it is the side to the pump, replace the inertia switch.

[gmurrayjr]

Turned out to be the fuel pump . Thanks for the help.

[way2old]

Thanks for the fix reply. We really appreciate that you took the time to respond with the fix.