StrongArm 4576 Back Glass Lift Support

Back Glass Lift Support for Trailblazer, Envoy, and More

Restore controlled rear window operation with this StrongArm back glass lift support, part number 4576. It is a specific-fit pressurized cylinder engineered for rear glass applications on select Chevrolet, GMC, Saab, Buick, and Isuzu models, including Chevrolet Trailblazer and GMC Envoy.

• Specific-fit back glass lift support for rear window glass applications
• Extended length: 21.6 in.; compressed length: 14.01 in.
• Stroke length: 7.59 in. for smooth opening and closing travel
• Maximum force: 34.0
• Black steel outer cylinder with rubber and Teflon materials
• Ball socket (nylon) 8mm ends on both sides
• Fits 2002-2009 Chevrolet Trailblazer, N/A
• Fits 2002-2009 GMC Envoy, N/A
• Fits 2005-2009 Saab 9-7x, N/A
• Fits 2008 Isuzu Ascender, N/A
• Fits 2004-2007 Buick Rainier, N/A
• Fits 2002-2004 Oldsmobile Bravada, N/A

Built for Rear Glass Support

StrongArm 4576 is a rear glass lift support that uses pressurized cylinder construction to hold the back window in position during opening and closing. The specific-fit design helps ensure proper alignment on the listed vehicles, while the steel outer cylinder and nylon ball socket ends support consistent operation. This part number 4576 is a direct replacement style solution for rear glass lift support service on Chevrolet Trailblazer and GMC Envoy applications, along with the related Saab 9-7x, Buick Rainier, Isuzu Ascender, and Oldsmobile Bravada platforms.

This part cross-references AMS Automotive 4576 for the same application.

Common Problems This Part Can Address

• Rear glass that will not stay open
• Back window dropping too quickly
• Weak or inconsistent lift support pressure
• Hard-to-lift rear glass on hatch or liftgate glass
• Noisy or rough rear window movement

Installation Notes and Tips

Verify vehicle fitment by year, make, and model before installation. Inspect the mounting points and ball studs for wear or damage before attaching the new support. For balanced operation and even wear, replace lift supports in pairs when servicing the rear glass system.

Quality Assurance

StrongArm lift supports are custom engineered and manufactured beyond industry standards to deliver smoother operation and longer service life in automotive applications.