2000 Pontiac Grand Prix no power to the fuel pump at all.

DRIV3NX

MEMBER
2000 PONTIAC GRAND PRIX
6 CYL
2WD
AUTOMATIC
120,000 MILES

I have a 2000 grand prix se with about 120000 on it. Took battery out and ever sense then the fuel pump dosnt work at all. Changed harness checked all wires changed relays fuses everything possible that I know of. Tried the diagnostics machine couldnt read the vehicle or identify it. Ive been told there is a theft system built into the computer and I could have triggered that? I have checked everything stupid I could be im dumbfounded now.

5 Replies

MMPRINCE4000

MECHANIC
8,548 POSTS

Try this:

So the engine cranks but it wont start? IS the security light flashing? If so try this
GM PASS LOCK RELEARN- Ignition to "run" position, try to start and let key return to "run" position
Approx ten minutes security light will go off
Turn key "off" and wait 5 seconds
Repeat 2 more times for a total of 3 relearns.
Turn key off, then start it.

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Sunday, October 25th, 2009 AT 9:54 AM

DRIV3NX

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3 POSTS

Ok I will give that a try and let you know how it goes thanks for the feedback

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Tuesday, October 27th, 2009 AT 2:35 PM

DRIV3NX

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3 POSTS

The light is not flashing and I tried that nothing still.

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Tuesday, October 27th, 2009 AT 2:39 PM

MMPRINCE4000

MECHANIC
8,548 POSTS

Chech fuel pump fuse and relay. A dealer or trusted garage should be able to power the FP independant of fuses and relays, this will tell you if FP is bad.

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Wednesday, October 28th, 2009 AT 8:38 AM

DRIV3NX

MEMBER
3 POSTS

Yea I changed all thoses checked all wires checked everything any shop told me lol what else would cause it to not tell it to send fuel its a brand new fuel pump also. The security light comes on but goes off no check engine on and the diagnostic tool wont read the car? Whats that about?