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6 and 1/2 inches, round speakers on a 2000. Probably same on 2001.
type in your car's info at www.clutchfield.com and it will post your info!
34mm for 2001 non-AWD
www.sonicelectronix.com is my favorite site and knows exactly what will fit.
The front door speakers on a 2000 Pontiac Grand Am Se are 4x6. The rear deck speakers are 6x9.
What size speakers go on the rear of a 2001 Buick lesaber
4x6
The rear speakers are 6"x9"
For a Pontiac Montana the battery is a group 78. Follow this link for dimensions.http://www.rtpnet.org/teaa/bcigroup.html
215/70R15
its a 3.4 liter
p215/70R15