gas gauge fluctuates, does not indicate fuel level properly on 2001 Pontiac Grand Prix

I can acess the unit via a panel in the trunk should I just replace the whole fuel pump I assume that is where the pump is under that panel then I have to remove it from the tank is this the corret procedure to repair it?

Verry close! Check out the youtube video, shows exactly what to do! Just enter in the search bar:: install fuel pump 01 grand prix. Replace the whole pump module!
1 more answer
yes. runs about 200-250 depending where you go.