The Chevrolet TrailBlazer SS (TBSS) is a high-performance SUV that demands a suspension setup capable of handling its power and weight. While the factory suspension is decent, many owners find it too soft for spirited driving or off-road use. Enter KW Suspension – a German manufacturer renowned for precision-engineered coilovers and struts. This guide covers everything you need to know about TBSS suspension parts from KW, including the differences between their coilover series, installation considerations, and how to make the best choice for your driving style. Whether you're lowering your TBSS for better aesthetics or upgrading for track days, KW offers proven solutions.
Note: The stock TBSS suspension tends to sag over time and offers limited adjustability. Aftermarket parts like KW coilovers not only restore ride height but allow you to fine-tune damping and spring rates. Let's dive into the specifics.
Why Choose KW for Your TBSS?
KW Suspension has been a trusted name in the automotive industry for decades. Their coilovers are TÜV-certified and feature stainless steel bodies for corrosion resistance. For the TBSS, KW offers direct bolt-on kits that preserve factory mounting points. The three main series – Street Comfort, Variant 2 (V2), and Variant 3 (V3) – cater to different needs.
KW Street Comfort Coilovers
The Street Comfort series is designed for daily drivers who want a dose of sportiness without sacrificing ride quality. It features fixed damping (non-adjustable) but with a progressive spring rate that firms up during hard cornering. This is the most affordable KW option for TBSS owners.
Pros:
- Improved handling over stock
- Comfortable on rough roads
- Lower cost
Cons:
- No damping adjustability
- Not ideal for track use
KW Variant 2 (V2) Coilovers
Variant 2 adds separate rebound damping adjustment, allowing you to dial in the feel for your preferences. The rebound adjuster has 16 clicks, enabling a wide range from comfort to firm. This is a popular middle-ground choice for TBSS owners who occasionally autocross or tow.
Pros:
- Rebound adjustable
- Good balance of comfort and performance
- Suitable for towing with proper setup
Cons:
- No compression damping adjustment
- Slightly stiffer than Street Comfort
KW Variant 3 (V3) Coilovers
The V3 is the top-tier system with independent rebound and low-speed compression damping adjustment. This allows precise tuning for both bump absorption and body roll control. For TBSS owners who track their SUV or demand maximum performance, the V3 is the benchmark.
Pros:
- Full adjustability (rebound & low-speed compression)
- Excellent control for spirited driving
- Raises the TBSS's dynamic ceiling significantly
Cons:
- Higher cost
- Requires more setup time
- Stiffer than other series
KW Suspension Parts for TBSS – What's Included?
Each KW coilover kit for the TBSS comes with four struts/coilovers (front and rear), springs, bump stops, dust boots, and mounting hardware. The front struts are inverted monotube designs, while the rears are separate spring and shock units typical of SUVs. KW also offers optional parts like adjustable sway bar end links for complete suspension tuning.
Important: Verify your TBSS model year (2006-2009). All years share the same chassis, but some early models have slight differences in top mounts. KW kits are generally compatible across all years when using factory top mounts.
Installation Considerations
Installing KW coilovers on a TBSS is a moderate difficulty job, similar to any strut replacement. You'll need a spring compressor (though KW springs are pre-assembled on the front struts), basic hand tools, and an alignment afterwards. Professional installation is recommended if you lack experience, as improper installation can lead to noises or premature wear.
Key steps:
- Remove factory strut assemblies.
- Install KW units using existing top mounts (or optional camber plates).
- Reattach sway bar links, brake lines, and ABS sensors.
- Lower the vehicle and set ride height (KW kits allow about 1-2 inches of drop).
- Go for an alignment drive to settle suspension, then adjust damping.
Note: The TBSS rear suspension is a live axle with coil springs; KW provides new springs and shock absorbers. Ride height is set by threaded collars on the spring perches.
Performance Benefits
Upgrading to KW suspension dramatically improves the TBSS's handling. Body roll in corners is reduced, steering response becomes sharper, and the rear axle stays more planted during hard acceleration. Many owners report the TBSS feels as controllable as a much lighter car. For daily driving, a well-tuned V3 setup can still be comfortable, though it will be firmer than stock.
Towing tip: If you tow with your TBSS, the V2 or V3 with adjustable rebound helps control trailer sway. Set rebound to a firmer click when loaded.
Comparing KW to Other Brands
While this guide focuses on KW, other brands like Eibach, H&R, and Bilstein also offer suspension parts for the TBSS. KW's advantage is the high-quality stainless steel construction, extensive adjustability, and long warranty (5 years on V2/V3). Eibach offers pro-kit springs that are cheaper but don't include dampers. H&R has coilovers similar to KW Street Comfort but with less adjustability. Bilstein 5100 shocks are a popular budget upgrade but not fully adjustable.
Verdict: For those who want the best performance and adjustability, KW V3 is the top choice. For a balance of cost and features, V2 is excellent.
Maintenance and Longevity
KW coilovers are built to last, but they require occasional checks. Every 20,000 miles, inspect the damper bodies for damage or leaks. The threaded collars can corrode if exposed to salt, so cleaning and applying anti-seize is recommended. Rebuild services are available from KW authorized centers if needed.
Practical Recommendation
Choose your KW TBSS suspension based on primary use:
- Daily driver with occasional fun: KW Street Comfort – you get a lower, stiffer ride without the complexity of adjustability.
- Spirited street driving and occasional track/autocross: KW V2 – rebound adjustment lets you dial in comfort for daily and stiffness for playtime.
- Max performance and track use: KW V3 – full adjustability for the ultimate control.
Important: Always pair your suspension with quality tires (e.g., Michelin Pilot Sport 4S) and consider upgrading the rear sway bar (e.g., Hotchkis or Addco) for even better cornering. An alignment with -1.5 to -2 degrees of front camber (if allowed) can further improve turn-in.
In summary, KW suspension parts for the TBSS are a top-tier upgrade that transform an already capable SUV into a true sports machine. The investment is justified by the build quality, adjustability, and performance gains. Whether you choose Street Comfort, V2, or V3, you'll enjoy a more responsive and engaging driving experience.