2004 Pontiac Grand Prix: Just started having

go thru rear seat

You need a good auto-electrician. Something in the shifter is causing that fuse to blow. It must have some shared power. Your doors work fine. Take the control apart and check for chafing, and check all the way down to the transmission.

https://fuse-box.info/pontiac/pontiac-grand-prix-2004-2008-fuses-and-relays

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You turn the key on - off - on - off - on within 3 seconds and then hold both the lock and unlock buttons on the remote for 3 -5 seconds. The doors should lock and unlock, you can let go of the buttons now....it should be programed.

Have a professional check your battery voltage under load.

You will have to take the door panels off of each of the doors and see what is preventing the latch to lock the doors, whether its just missing the lock or something is broken in the lock mechanism

Hold the door lock switch on to the unlock 5-10 seconds and it should release the trunk.Both the passenger and drivers door operate this.

you can gain access through the rear seat, once inside locate the lock using a pair of pliers you can gain access by turning the bar on the lock one way or the other. If you need to replace the lock remove the U-shaped clip that holds the lock cylinder in place... Otherwise take the lock to someone who can repair it that way you don't have to have several different keys to open and start and run your vehicle etc. Hope this helps

Have you found out what was going on? My car just started doing it as well.

If you will turn the ignition on, press & hold the door lock release button to the left . . . . viola!

ur power box is warped.on the drivers door. same thing happened to my Grand Prix