How to Replace Rear Disc Brakes on a 1999 Chevy Blazer (What Video Guides Show — and What They Don't)
If you've been searching for a video on replacing the rear disc brakes on a 1999 Chevy Blazer, you're working on one of the trickier DIY brake jobs in the late-90s GM SUV lineup. The rear brake setup on the second-generation S-10 Blazer is a disc-over-drum hybrid — meaning there's a small drum brake integrated inside the rear rotor hat for the parking brake. That single detail changes the job considerably compared to a standard rear disc replacement.
What Makes the 1999 Blazer Rear Brakes Different
Most drivers assume rear disc brakes compress the same way as front disc brakes — push the caliper piston back in, swap the pads, done. On the 1999 Blazer, that's not how it works.
The rear calipers on this vehicle use a screw-type piston rather than a simple push-in piston. The piston must be rotated clockwise while being pushed inward simultaneously — a task that requires a specific caliper wind-back tool. Forcing the piston straight back without rotation will damage the caliper.
This is the most common mistake shown (and corrected) in repair videos for this generation Blazer. If a video doesn't address the wind-back step, it's likely not specific to this application.
What the Job Actually Involves 🔧
A thorough rear disc brake replacement on the 1999 Blazer generally covers:
1. Raising and securing the vehicle The rear wheels come off first. Proper jack stand placement under the frame or axle is essential — never work under a vehicle supported only by a floor jack.
2. Removing the caliper Two slide bolts (typically 3/8" hex/Allen) hold the caliper to the bracket. These are known to seize on older vehicles. Penetrating oil applied ahead of time helps significantly.
3. Hanging the caliper safely The caliper must be hung or supported — never let it dangle by the brake hose. A wire hook or bungee cord works.
4. Removing the rotor The rotor on this vehicle can stick to the hub due to rust. The threaded holes in the rotor face accept a bolt that, when tightened, pushes the rotor free. Avoid hammering the rotor face.
5. Winding the piston back in This is the critical step. A caliper wind-back tool kit (available at most auto parts stores) has a variety of adapters. For GM rear calipers of this era, you'll press in while turning clockwise. The rubber boot should seat properly when complete.
6. Lubricating and reassembling the caliper hardware Caliper slide bolts and their boots benefit from fresh high-temperature brake grease. Sticky slides are a major cause of uneven pad wear and dragging brakes on this platform.
7. Bedding the brakes After reassembly, the brake system needs to be bled if any fluid was lost or components were replaced. New pads and rotors also benefit from a bed-in procedure — a series of moderate stops from highway speed to transfer pad material evenly onto the rotor surface.
Parts You'll Typically Need
| Component | Notes |
|---|---|
| Rear brake pads | Semi-metallic or ceramic; application-specific |
| Rear rotors | Solid rotors on most Blazer configurations |
| Caliper hardware kit | Includes slides, clips, and boots |
| Brake cleaner | For cleaning rotor surfaces before install |
| Brake grease | High-temp, for slides only — never on pad faces |
Whether you replace rotors along with pads depends on rotor thickness, scoring depth, and the judgment call made after inspection. A worn rotor below minimum thickness specification shouldn't be reused regardless of how the pads look.
Why Video Guides Vary So Much in Quality
Searches for "1999 Chevy Blazer rear brake replacement" surface a mixed range of results. Some videos are filmed on similar-but-not-identical vehicles — the S-10 pickup, the Jimmy, or even a different model year Blazer with slightly different caliper hardware. The wind-back step is frequently glossed over or skipped entirely in general-purpose brake videos.
The most reliable videos will:
- Show the caliper wind-back tool being used on the actual piston
- Address the parking brake adjuster inside the drum
- Confirm the slide bolt size and torque spec for this application
- Show the boot condition being checked on reassembly
If you're following along with a video and the presenter just pushes the piston straight back in without a tool, stop — that video is not for your application.
Factors That Change the Difficulty Level
Several variables affect how this job goes in practice:
- Vehicle age and rust exposure — A Blazer with 25+ years of road salt exposure will have far more corrosion on slides, bolts, and rotors than one from the Sun Belt
- Parking brake adjustment — If the integrated drum-style parking brake has been neglected, it may need adjustment as part of this job
- Caliper condition — If the pistons are seized or the boots are cracked, pad replacement alone won't restore proper braking
- Prior work history — A vehicle where the brakes have never been touched since the 1990s presents different challenges than one serviced recently
The 1999 Blazer rear brake job is within reach for a careful DIYer with the right tools, but the screw-type piston and integrated parking brake make it more involved than it appears at first glance. How smoothly it goes depends on the specific condition of your vehicle.
