The Envoy/TrailBlazer/Bravada etc are all a part of the GMT360 platform and share identical parts. The rear wiper is really poor on the older models. If you order a replacement kit of the 2006 wiper from www.parts4chevys.com (listed under the TrailBlazer Upgrades) that will solve the wipe issue and be a great improvement in looks also! You can see the new style wiper installed on my '03 at the enthusiasts website ..... Blazernut ....in my Gallery! For more great info on these trucks join our enthusiasts forum at www.trailvoy.com
In your closet
The 2005 Toyota Avalon takes 26" drivers side and 20" passenger side replacement windshield wiper blades.
The drivers side wiper blade for a 2005 Subaru Forester is 22 and the passenger side wiper blade is a 19. The rear window wiper is a size 15.
Your switch on your steering column
At any auto parts store
The 2005 Honda Accord takes 26" drivers side and 18" passenger side replacement windshield wiper blades.
The 1997-2005 Chevrolet Venture takes 24" replacement windshield wiper blades on both sides front and a 16" rear replacement wiper blade.
All 1995-2005 Chevrolet Blazers take 20" replacement windshield wiper blades on both sides front. The rear wiper blade is a 14".
Wiper park switch is bad
Its best to consult your owner's manual. It will have a chart.
The 2001-2005 Honda Civic (all except SI) takes 21" driver side and 19" passenger side replacement windshield wiper blades. The 2002-2005 Honda Civic SI takes 24" driver side and 16" passenger side replacement windshield wiper blades.
The 2005 GMC Envoy wiper blade sizes are 22" wiper blades on both sides front and a 16" rear wiper. See sources and related links below for more information. Since there are over 22 different wiper arm attachments, do not buy wipers just by length only - be sure to lookup exact wiper blade part numbers by vehicle make, model and year for the brand wiper you decide to purchase. This ensures correct length AND correct attachment.