Having problems with your 2004 Pontiac Grand Prix ?
How to reset my pcm on 2004 grandprix
\015 Fuel pump shut down and computer shut down\015
Sounds like you lost the computer. You can try t removing battery cables and build then together to drain the power for the memory. Doubt it will work though.
Repair Help & Product Troubleshooting for 2004 Pontiac Grand Prix
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