This will vary depending on the year of the Chevy Trailblazer. See sources and related links below to lookup correct lengths with correct attachments below.
The 2002 Chevy Trailblazer takes 22" replacement windshield wiper blades on both sides front and a 16" rear wiper.
The 1993 Mercury Villager takes 22" replacement windshield wiper blades on both sides front.
See sources and related links below to lookup windshield wiper blade sizes.
The front windshield wiper size on a Dodge Caravan is 26 inches for both driver and passenger. The rear windshield blad is 16 inches.
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The 2004 Chevrolet Silverado takes 22" replacement windshield wiper blades on both sides front.
The 2002 Jeep Liberty takes 19" replacement windshield wiper blades on both sides front.
The 1989 GMC G-Series Vandura takes 16" replacement windshield wiper blades on both sides front.
The 2003 Acura TL 3.2 takes 24" drivers side and 19" passenger side replacement windshield wiper blades.
The 1998 Ford Ranger takes 18" replacement windshield wiper blades on both sides front.
20" unless it is an older vehicle.
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