If the trouble is the speedometer itself, you can't; but it could be the sending unit and that can be replaced fairly easily. If you remove the right front wheel and move the skirt it can be seen on top of the transaxle extension. If your speedometer AND odometer have ceased to work this is the culprit but if the odometer works accurately but not the speedometer you need another instrument cluster to get a new speedometer.
i have a 2000 pontiac grand prix that seem to burn alot of antifree
You will have to replace the regulator assembly.
http://www.a1electric.com/grandam.htm <-- this is the original answer. It shows a Grand Am, which is different. Here's a Grand Prix: http://www.paulstravelpictures.com/Grand-Prix-Window-Motor/index.html
1997 gran prix wipe stay in upright possission when shut how to fix
Give it a tune up. Change the spark plugs and wires..
The door handle of a 1996 Pontiac Grand Prix can be replace because broken units will can not be fixed. To replace a handle remove the unit from the door and unhinged the locking mechanism.
Butterfly in the throttle body needs cleaning.
How do i fix the TPS pedal position sensor in a grand prix pontiac 2004.
drop the gas tank and change the sending unit
Don't try and clean them ...just replace why should i try not to fix it myself it is cheaper
Have you checked the timing? It could be that or something else wrong with the ignition system.
reverse black and red wires