Start by checking to make sure you have the correct size bulbs installed. If they are correct then replace the flasher relay. It is located Front seating area, driver side, under dash, mounted on top of brake pedal. If that does not cure the fast flashing, you may have a bad ground connection or the turn signal combination switch may be bad.
There is no relay. The flasher in under the dash on the left of the steering column
under dash drivers side mounted above the brake pedal
I couldn't find a picture for you, but my Haynes manual says that the flashers are located in the "convenience center". This is supposed to be located somewhere in or near the driver's side kick panel.
Remove the panel under steering wheel. There will be 2 flashers. Replace one on right.
check your fuses first, then check your bulbs and then your relay.
Well, if none of them work, (front or back) I'd suspect a fuse or the flasher. Do the 4 way emergency lights work? If so, they operate on a separate flasher and this would indicatethat the turn signal flasher is bad.
Behind the steering wheel right above igontion.
Pull off panel under steering wheel. You will see two separate flashers. Replace the one on the right.
The 1991 Pontiac turn signal flasher relay switch can be found beneath the drivers side dashboard. The turn signal flasher relay switch will be above the gas pedal.
The turn signal flasher on the 1999 Pontiac Grand Prix is located near the steering column under the lower part of the dash. Look for a silver or black cylinder that is plugged into a receptacle much like that of a household outlet.
under the dash
where is the flasher relay located in 2004 grand am