See sources and related links below to lookup wiper sizes for any Pontiac Grand Am (or G6).
19 inches
The 1997-2008 Pontiac Grand Prix takes 22" replacement windshield wiper blades on both sides front.
All 1998-2002 Pontiac Firebirds/Trans Ams take 24" replacement windshield wiper blades on both sides front.
Step 1 is to be sure you get the right replacement wiper blades. The 1997 Pontiac Grand Am takes 19" replacement windshield wiper blades both sides front.
The Bonneville is Pontiac. See sources and related links below to lookup wiper blade sizes by Pontiac Bonneville model year.
what size wiper blades do I need for a vw 2003 bettle?
The 2000 Pontiac Montana takes 24" drivers side and 16" on the passenger side. When buying windshield wiper blades be sure to always use the application guide book at the store or now-a-days you can Google 'lookup wiper size'. See sources and related links below for more information.
Be careful on this vehicle. If the arms are standard hood, use the link below in Sources & Related links. If it is a reverse hook, the wiper blades are special.
Any place that sells wiper blades can tell you the correct size to purchase.
size 20.
All 1985-1998 Pontiac Grand Ams take 19" replacement windshield wiper blades on both sides front.
22in