Ok i hope i can help, there is a cobalt forum out there on the web with pictures and instructions on how to take the door panel apart. The cobalt is the same as the G5. The interior door panel might be slightly different , but this will give you a good start.
Second is to think of the factory amplifier is set to run factory speakers which are not the same ohm's ( i believe) someone correct me if i am wrong and can add help. I am not sure of all the details, you should call your local audio shop and ask about this. If your using another speaker from G.M. that by all means go ahead and throw it in.
It may be best to look into an aftermarket amp. and run the new more power hungry speakers off of that. Find an amp with low level inputs or you will need a line level adapter.
There are other options including head unit replacement and running the speakers straight from that and by passsing the factory amp.
It can be a difficult task doing all of these thing i have mentioned. but if your not sure what your doing...Call a Pro
remove the door panels
take door panel off
The front door speakers on a 2000 Pontiac Grand Am Se are 4x6. The rear deck speakers are 6x9.
the door speakers are 5.25" round, and the rear deck speakers are 6x9".
The door speakers are 5.25 inches but you have to purchase an insert in order to replace the door speakers.
how do you replace a blend air door assembly on a 2000 pontiac bonneville
Remove door panels.. Unscrew old speakers..Screw in new speakers..replace door panels...ready 2 GO..
4x6
4x6
speakers are on the front dash and back hatch door.
What I was told by circuit city.For a two door Pontiac grand am SE the door speakers are 4*6's and the rear deck speaker are 6*9's What I was told by circuit city.For a two door Pontiac grand am SE the door speakers are 4*6's and the rear deck speaker are 6*9's
Remove the door panels and replace the speakers. They sit in baskets and are simple to replace. We have instructions at our enthusiasts forum. www.trailvoy.com