AiYiGu Rear Hatch Struts for 2002–2009 Chevrolet Trailblazer & GMC Envoy — Left/Right Pair, Direct-Fit Gas Shocks

AiYiGu rear hatch struts are replacement gas shocks engineered to restore smooth, controlled opening and secure holding of the rear liftgate on compatible 2002–2009 SUVs.

If your Trailblazer, Envoy, Rainier, Ascender, Bravada, or Saab 9-7X has a sagging or hard-to-lift rear hatch, worn factory lift supports are often the culprit. These AiYiGu struts are a direct-fit aftermarket pair that replace OEM part numbers 4573 and SG330046. They arrive as two completed shocks (left and right) sized to match the original geometry so you can swap them in with basic hand tools and minimal effort.

How will these struts change how the hatch opens and closes?

Worn or weak hatch shocks let the tailgate drop, open unpredictably, or require extra effort to lift. Installing a fresh set of AiYiGu struts returns even, predictable motion and positive hold when the hatch is raised. You’ll notice smoother travel and reduced stress on the hinge hardware.

• Restores controlled lift and steady hold at full extension.
• Reduces sudden drops and noisy operation.
• Matches original compressed (12.68") and extended (20.16") lengths.
• Sold as a left/right pair so both sides share equal damping.

Will these fit my vehicle and replace the OEM parts?

These AiYiGu hatch shocks are designed for a range of GM-based SUVs and crossovers from the early 2000s. They are listed to replace the common OEM numbers and fit vehicles that used the same lift-arm mounting layout. Always compare the stated lengths and part numbers to your existing unit before purchasing to ensure correct fitment.

• Compatible with Chevrolet Trailblazer (2002–2009) and GMC Envoy (2002–2009).
• Also fits Buick Rainier, Isuzu Ascender, Oldsmobile Bravada, Saab 9-7X models specified.
• Replaces OEM Part No. 4573 and SG330046 for direct-fit replacement.
• Verify compressed and extended lengths (12.68" / 20.16") against your current struts.

How difficult is installation and what tools are needed?

Installation is straightforward for a DIYer with basic tools. The shocks use push-on ball-stud fittings so no new screws or fasteners are required; a flathead screwdriver helps pry off the old bracket caps. Support the hatch with a prop or a helper while you swap both struts to avoid injury.

• Includes two struts (left and right); screws are not included or required.
• Use a flathead screwdriver to detach the old bracket caps safely.
• Prop the hatch open with a rod or assistant during replacement.
• Typical install time: 15–30 minutes for both sides.

What warranty and support come with AiYiGu struts?

AiYiGu provides a two-year warranty covering defects in materials and workmanship from the date of purchase. If you encounter fitment questions or manufacturing issues, their customer support is available to assist and arrange replacements when appropriate.

• Two-year limited warranty included.
• Customer support available for fitment and quality inquiries.
• Sold as a matched pair to ensure consistent performance.
• Return or replacement options handled per AiYiGu policy.

Who is this for: This product suits owners and mechanics working on 2002–2009 Chevrolet Trailblazer and GMC Envoy vehicles, plus the listed Buick, Isuzu, Oldsmobile, and Saab variants, who need a budget-friendly, direct-fit replacement for failing rear liftgate supports. It’s ideal for DIY enthusiasts looking for a quick, reliable repair that restores lift assistance and prevents unexpected hatch drops.