The Pontiac G8 is a performance sedan beloved by enthusiasts for its powerful V8 engine, rear-wheel-drive layout, and aggressive styling. However, no matter how much power you have under the hood, your ride quality and handling are only as good as your suspension system—especially the struts. Over time, worn-out struts can make your G8 feel floaty, unresponsive, or downright unsafe. In this comprehensive guide, we’ll walk you through everything you need to know about Pontiac G8 strut replacement, from symptoms of failure to DIY installation tips and best replacement options. pontiac g8 strut replacement
Why Struts Matter in the Pontiac G8
Struts are a critical component of your car’s suspension system. In the G8, they serve two important functions:
Absorbing road impact to provide a smooth ride
Maintaining wheel alignment and suspension geometry for proper handling
When struts wear out, your G8 may bounce excessively, handle poorly in corners, or suffer from uneven tire wear. For a performance vehicle like the G8, maintaining responsive suspension is key to both safety and driving enjoyment.
Signs You Need to Replace Your Struts
Wondering if it’s time to replace the struts on your Pontiac G8? Look out for these warning signs:
Excessive bouncing or nose-diving when braking
Clunking or knocking sounds over bumps
Uneven or accelerated tire wear
Fluid leaking from the strut housing
Poor steering response or increased body roll
If your G8 is approaching or has surpassed 60,000–100,000 miles, it's a good idea to have the suspension inspected, even if you're not yet noticing symptoms.
OEM vs. Aftermarket Struts: What Should You Choose?
When replacing your struts, you’ll need to choose between OEM (Original Equipment Manufacturer) and aftermarket options.
OEM Struts:
Designed to match factory specs
Reliable ride comfort and quality
Often more expensive
Aftermarket Struts:
May offer performance upgrades (adjustability, firmer damping)
Can be more affordable
Quality varies between brands
Recommended Brands:
OEM Replacement: AC Delco, Monroe
Performance-Oriented: Bilstein B8, Koni STR.T, KYB AGX
If you're looking to maintain the factory ride, go with OEM. But if you're upgrading your G8 for spirited driving or track days, performance struts are worth the investment.
Tools and Parts Needed for Replacement
Before diving into the strut replacement process, gather the necessary tools and components.
Parts:
Replacement struts (front and/or rear)
Strut mounts (recommended to replace)
Bump stops and dust boots (optional but ideal)
Tools:
Socket and wrench set
Spring compressor
Torque wrench
Floor jack and jack stands
Pry bar
Breaker bar
Penetrating oil (like PB Blaster)
Safety Tip: Use a high-quality spring compressor and follow instructions closely. Strut springs are under extreme pressure and can cause serious injury if mishandled.
Step-by-Step: How to Replace Struts on a Pontiac G8
Step 1: Preparation
Park on a level surface and engage the parking brake.
Loosen the lug nuts on the wheels where you’re replacing the struts.
Jack up the car and secure it with jack stands.
Remove the wheels.
Step 2: Remove the Old Strut
Locate the strut-to-knuckle bolts and apply penetrating oil.
Disconnect any brake lines or ABS sensors attached to the strut housing.
Support the lower control arm with a jack or jack stand.
Remove the bolts connecting the strut to the knuckle.
Under the hood, remove the nuts holding the strut mount in place.
Carefully lower and remove the entire strut assembly.
Step 3: Disassemble the Strut (if not using pre-assembled)
Mount the strut in a spring compressor.
Compress the spring slowly and evenly.
Remove the top nut with a socket or impact gun.
Disassemble the strut and inspect all parts.
Step 4: Assemble the New Strut
Install the new strut into the spring.
Reinstall the bump stop, boot, and top mount.
Tighten the top nut and ensure everything is seated properly.
Carefully decompress the spring.
Step 5: Reinstall the Strut Assembly
Align the new strut in the strut tower and tighten the upper nuts.
Reattach the strut to the knuckle and torque the bolts to spec.
Reconnect brake lines and sensors.
Reinstall the wheel and hand-tighten the lug nuts.
Repeat the process on the other side if necessary.
After Replacement: Don’t Forget the Alignment
Any time you replace suspension components, especially struts, it’s essential to get a professional wheel alignment. Failing to align your G8 after strut replacement can lead to:
Uneven or rapid tire wear
Poor handling
Reduced fuel economy
Book an alignment as soon as your installation is complete to ensure proper geometry and safety.
Should You Replace Rear Struts Too?
Yes, if your rear struts are showing signs of wear or you want a balanced suspension feel, replace both front and rear struts. Many G8 owners choose to do all four corners at once for consistent ride quality.
How Much Does It Cost to Replace Struts on a Pontiac G8?
The total cost can vary depending on parts and labor:
| Service | Estimated Cost (USD) |
|---|---|
| Front Struts (Parts Only) | $150 – $400 |
| Rear Struts (Parts Only) | $120 – $300 |
| Labor (Per Axle) | $150 – $300 |
| Full Set Installed | $500 – $1000+ |
DIY installation can save you significantly on labor costs.
Final Thoughts: Keep Your G8 Driving Like New
Your Pontiac G8 is a performance machine that deserves proper maintenance to perform at its best. Replacing worn struts is a smart investment that restores your ride’s comfort, handling, and overall driving dynamics.
Whether you're a DIY enthusiast or prefer professional installation, keeping your struts in top condition ensures that your G8 continues to deliver the exciting driving experience it was designed for.