BST BSSP Rear Trailing Upper Control Arms Pair with Preinstalled Bushings — Direct-Fit for 2002–2009 Envoy/Trailblazer/9-7x/Ascend

These are a matched pair of rear upper trailing control arms with preinstalled bushings designed to replace worn OEM units on 2002–2009 Envoy, Trailblazer, 9-7x and Ascender models.

Restore suspension geometry and rear-wheel alignment with a pair of direct-fit trailing upper control arms from BST BSSP. Sold as a driver-side and passenger-side set, they come complete with bushings for a ready-to-install replacement. The components are specified for vehicles without air level suspension and correspond to multiple OEM numbers, making them suitable for common mid-2000s GM SUVs that share the GMT360 platform.

How do these control arms affect handling and alignment?

Worn or damaged trailing upper control arms allow excessive rear-wheel movement and can change toe and camber under load, causing uneven tire wear and unpredictable handling. Replacing them returns the rear suspension to its intended pivot points, helping maintain stable tracking and reducing vibration.

• Restores factory suspension geometry for improved stability.
• Reduces rear axle play that causes wandering or shimmy.
• Helps even out tire wear by maintaining correct wheel alignment.

What exactly is included in the kit and which part numbers match?

The kit contains two trailing upper control arms: one for the rear driver side and one for the rear passenger side. Both arms include bushings already installed and are manufactured as direct replacements for the original parts.

• Package includes: 1 rear driver-side arm + 1 rear passenger-side arm.
• Preinstalled bushings — no separate bushing purchase required.
• Compatible with OEM references like 15069837, 15069838, 15069840 and cross numbers shown.

Which vehicles and suspension types are these arms compatible with?

These BST BSSP control arms are tailored to GMT360-based SUVs from the 2002–2009 model years that do not use air-level suspension. They fit Envoy, Trailblazer, 9-7x and Ascender derivatives when the original upper trailing arms require replacement.

• Fits 2002–2009 GMC Envoy and Chevrolet TrailBlazer models on GMT360 platform.
• Compatible with Saab 9-7x and Isuzu Ascender variants of the same era.
• Not compatible with vehicles equipped with air-level or adaptive rear suspension systems.

How difficult is installation and what should I prepare?

Installation is straightforward for someone with basic mechanical experience and access to common shop tools. Expect to unbolt the old arms from the subframe and axle control points, then torque the new units to factory specifications; alignment after installation is recommended.

• Requires standard sockets, torque wrench, and jack stands or lift.
• Torque nuts to manufacturer specifications and replace lock hardware if needed.
• Professional alignment is recommended after replacement for best results.

Who is this for: These BST BSSP trailing upper control arms are aimed at DIY mechanics, independent shops, and fleet-maintenance teams working on GMT360 SUVs that need reliable, ready-to-install rear suspension replacements. They suit owners looking to correct play in the rear suspension, eliminate rear-end wander, or replace arms that show visible wear, cracking, or failed bushings. For questions about fitment or compatibility with your vehicle, contact the seller — responses are typically provided within 12 hours.