1989 Chevy Blazer Suspension Performance Parts: A Complete Guide

Owning a 1989 Chevy Blazer means you already appreciate a classic SUV with serious potential. Whether you’re after a smoother daily ride, better off-road capability, or more aggressive stance, upgrading the suspension is the most impactful change you can make. The right suspension components will transform how your Blazer handles bumps, corners, and trails. This guide covers the essential performance parts for the 1989 Chevy Blazer (K5 and S-10 models) and helps you choose the best setup for your needs.

Lift Kits for 1989 Chevy Blazer

Lift kits are the most common suspension upgrade for Blazers, especially for off-road use. They provide clearance for larger tires and improve approach, breakover, and departure angles.

Body Lift vs. Suspension Lift

A suspension lift uses taller springs, spacers, or new control arms to raise the frame away from the axles. It offers genuine increased ground clearance and better suspension articulation. For the 1989 Blazer, a 4-inch suspension lift is a popular starting point for 33-inch tires without excessive strain on driveline components. Body lifts, on the other hand, only raise the body off the frame using pucks, providing tire clearance but no additional ground clearance. They are cheaper and easier to install but should not be combined with very tall tires if you do serious off-roading.

Key Components in a Quality Lift Kit

• Coil springs or leaf springs: For front IFS (independent front suspension) on S-10 Blazers, coil springs are common. K5 Blazers use leaf springs in the rear. Choose springs with the correct spring rate for your expected load and driving style.
• Shock absorbers: Match your shocks to the lift height. Longer gas-charged shocks like Bilstein 5100s or Fox Performance Series are recommended.
• Extended brake lines: Required for lifts over 3 inches to prevent line tension.
• Traction bars or ladder bars: For the rear leaf springs, these reduce axle wrap and improve traction during hard acceleration.
• Steering stabilizers: Reduces bump steer and wobble on lifted Blazers.

Recommended Lift Sizes

• 2–3 inches: Minimal lift, fits 31-inch tires, retains good road manners. Ideal for weekend trail use.
• 4–6 inches: Accepts 33–35-inch tires, needs more steering and driveline modifications. Suitable for serious off-roaders.
• 6+ inches: Requires major modifications including driveshaft, steering, and sometimes axle swap. Only for dedicated rock crawlers.

Performance Shocks and Struts

Shocks control the motion of the springs, determining ride comfort and handling. Upgrading shocks is one of the most cost-effective performance improvements.

Types of Shocks

• Twin-tube hydraulic: Standard on most Blazers. Inexpensive but fade under heavy use.
• Gas-charged twin-tube: Nitrogen gas reduces aeration and fading. Rancho RS5000X and Monroe Reflex are good options.
• Monotube high-pressure gas: More consistent damping, better heat dissipation. Bilstein 5100 and Fox 2.0 are top choices for off-road and street use.
• Remote reservoir: For extreme off-roading, these offer oil cooling and additional adjustment.

Selecting Shocks for Your Blazer

• Daily driver / light off-road: Bilstein 5100 or Rancho RS5000X provide a firm but compliant ride.
• Heavy off-road / rock crawling: Fox 2.0 remote reservoir or King shocks offer better damping control.
• Street performance: Lowering springs paired with adjustable shocks like QA1 or Viking allow fine-tuning.

If your Blazer is lifted, always measure extended and collapsed lengths before purchasing shocks.

Upgraded Springs and Sway Bars

Springs support the vehicle’s weight and determine ride height. Original springs on a 1989 Blazer are likely sagged after decades of use.

Front Coil Springs (S-10 Blazer)

Stock springs are soft. For better handling, choose progressive-rate coils from Moog or Eibach. They tighten up during cornering while remaining supple over bumps. If you plan to add a winch or bumper, get heavy-duty springs.

Rear Leaf Springs (K5 and S-10)

Full-size K5 Blazers use leaf springs. Add-a-leaf kits can restore sagged springs or increase load capacity. For improved flex off-road, consider a softer progressive leaf pack from companies like Deaver or Alcan. For S-10 Blazers, the rear uses leaf springs as well; swapping to a set from a ZR2 model can improve ride height.

Sway Bars

Stiffer anti-sway bars reduce body roll in corners, making the Blazer feel more planted on pavement. Hellwig and Addco offer front and rear sway bars for the 1989 Blazer. Combined with polyurethane bushings, they minimize chassis flex during aggressive driving.

Steering Upgrades

Larger tires and lifts put stress on the steering system. Upgrading components improves durability and handling.

Pitman Arm and Idler Arm

These are common weak links. Heavy-duty replacements (Moog problem solver series) resist flex and prevent bump steer.

Steering Stabilizers

A single or dual steering stabilizer (like Rancho or Bilstein) dampens vibrations and keeps the wheel steady on rough terrain. Essential for any Blazer with 33-inch tires or larger.

Steering Box Brace

For K5 Blazers, a brace that mounts to the frame and steering box reduces flex and extends gearbox life, especially with oversize tires.

Bushings and Control Arms

Old rubber bushings cause sloppy handling. Replacing them with polyurethane or upgraded control arms restores precision.

Control Arms

• Upper / lower control arms (front IFS): Stock stamped steel arms flex under load. Tubular aftermarket arms (like from Rough Country or BDS) have stronger ball joints and allow alignment adjustments after lifting. They also accommodate larger shocks.
• Rear control arms (on some lifted kits): For trucks with a rear four-link, adjustable arms let you set pinion angle and wheelbase.

Bushings

Polyurethane bushings are stiffer than rubber, reducing suspension deflection. They transmit more noise and vibration, so they’re best for off-road or performance builds. For street comfort, stick with high-quality rubber (Moog).

Additional Considerations

Driveline and Differential

When lifting more than 4 inches, the driveline angles change. You may need a transfer case drop, angled shims, or a CV-style driveshaft. For the rear axle, check the pinion angle and consider a carrier bearing drop for full-size Blazers.

Tires and Wheels

Your new suspension deserves proper tires. For off-road performance, look at BFGoodrich All-Terrain T/A KO2 or Mickey Thompson Baja Boss. For street handling, performance all-season tires like Michelin Defender LTX provide a quiet ride. Wheel backspacing and offset matter—wheels with too much offset can cause rubbing.

Practical Recommendation

For most 1989 Chevy Blazer owners, a balanced setup works best. Start with a 4-inch suspension lift from a reputable brand like Rough Country, BDS, or Skyjacker. Pair it with Bilstein 5100 shocks, polyurethane bushings in the front sway bar and control arms, and a steering stabilizer. Replace worn steering linkage with Moog problem solver parts. This combination gives you impressive off-road capability, clearance for 33-inch tires, and a ride that’s still comfortable enough for highway driving. If your Blazer is primarily street-driven, consider a 2-inch lift or just new springs and gas shocks along with a thicker front sway bar. That will sharpen handling without the compromises of a tall lift. Always perform a proper alignment after any suspension work, and break in new components gradually. With the right parts, your 1989 Chevy Blazer will feel like a new truck, ready for any adventure.