BST BSSP Rear Upper Trailing Control Arms Pair for 02-09 Envoy TrailBlazer 9-7x Ascender — Pre-Installed Bushings, Direct-Fit

BST BSSP rear upper trailing control arm pair with pre-installed bushings replaces factory parts for 2002–2009 Envoy, TrailBlazer, 9-7x and Ascender models without air level suspension.

If your SUV’s rear handling feels loose or you see uneven tire wear, worn upper control arms are a common cause. This replacement kit from BST BSSP includes both left and right rear upper trailing control arms with bushings, sold as a pair to restore suspension geometry and stability. The components are direct-fit items engineered for vehicles using conventional rear suspension (not equipped with air level systems).

How will these control arms improve my vehicle's rear stability?

Replacing tired control arms renews the mounting points that keep the wheel aligned under load, which reduces wander and improves cornering predictability. The included bushings absorb road shock and limit unwanted movement for a firmer, more controlled rear end.

• Pair includes driver and passenger rear upper trailing arms for balanced handling.
• Pre-installed bushings reduce vibration and improve wheel tracking.
• Direct-replacement design simplifies installation using existing hardware.

Which exact models and part numbers fit with this kit?

This control arm kit targets 2002–2009 GM midsize SUVs and crossovers that use conventional rear suspension setups. It matches OE fitment numbers so you can confirm compatibility before purchasing.

• Compatible makes/models: Envoy, TrailBlazer, 9-7x, Ascender (without air level suspension).
• Relevant part numbers: 15069837, 15069838, 15069840 plus cross-references 505-00178, 521-979, 8150698370, K660155.
• Sold as a pair: (1) rear driver-side upper control arm and (1) rear passenger-side upper control arm.

What comes in the box and what should I expect during installation?

The kit ships ready-to-install with both trailing arms and their bushings, so you won't need to press-in separate components in most cases. Installation typically requires basic suspension tools and common shop procedures of removing the old arms and torquing the replacement hardware to factory specifications.

• Included: two rear upper trailing control arms with bushings (driver and passenger).
• Type: Rear upper control arm kit, direct replacements for non-air-level systems.
• Note: Use factory torque specs and inspect surrounding suspension parts during replacement.

Will these parts come with a warranty or seller support?

BST BSSP provides product support through the seller; reach out via message for questions or assistance. The listing indicates responsive customer service with typical reply times to help with fitment or returns.

• Contact option: message seller for questions and parts support.
• Response window: seller indicates answers within approximately 12 hours.
• Verify return/warranty terms with the seller before purchase for full protection.

Who is this for: The BST BSSP rear upper control arm pair is intended for owners and mechanics servicing 2002–2009 Envoy, TrailBlazer, 9-7x and Ascender models that have conventional rear suspensions and need direct-fit replacements. Choose this kit if you want a complete left-and-right solution with bushings included for faster installation and restored rear-end stability.