Rear Disc Brake Conversion for 1988-99 Chevy / GMC C1500 Sierra OBS Pickup Truck

1988-2000 Chevy & GMC 1500 Rear Disc Brake Conversion Kit: 12" Drilled & Slotted Rotors, Calipers with Parking Brake

Drop the drums. Stop like a modern truck.

Your OBS Chevy or GMC still has rear drum brakes from the 1980s, and you feel it every time you tow, haul or brake hard. This bolt-on rear disc brake conversion replaces the original 10" drums with 12" drilled and slotted rotors and large-bore GM calipers with a built-in parking brake. The result is stronger, more consistent stops and a pedal you can trust.

Why switch to rear disc brakes?

✅ More stopping power: disc brakes deliver stronger, more consistent braking than drums, especially in repeated hard stops.
✅ Better in wet weather: rotors shed water quickly, so your brakes stay responsive in rain and bad weather.
✅ Less fade when towing: discs get rid of heat better than drums, so your brakes stay strong when you're hauling a load or coming down a long grade.
✅ Balanced, predictable stops: smooth, even braking helps the truck stay straight and stable.
✅ Easier maintenance: no more drum adjusters, springs or shoe swaps. Pad changes take minutes.
✅ Keeps your parking brake: the calipers have a built-in emergency brake mechanism.

What's in the kit

• 12" multi-pattern rotors, drilled and slotted (pair)
• Large-bore GM calipers, black powder coated, based on the 1982 Eldorado design, with built-in parking brake (pair)
• Semi-metallic brake pads and pins (MKD154)
• Rubber brake hoses
• Mounting brackets and hardware

⚠️ Measure before you order: this kit fits 10" drum trucks only

This kit only fits trucks that have 10" rear drum brakes with the correct axle flange measurements.

How to check (no disassembly needed):

1. Confirm your rear drums are 10" diameter. 11" drums mean this kit will not fit.
2. Using the reference image below, measure the back side of the drum backing plate / axle flange and compare it to our dimensions.

Even if your truck is on the list below, the kit will not fit unless it has the 10" drums and the matching flange. You're responsible for confirming fitment before ordering. The buyer pays shipping on returns.

Fitment (10" rear drum models with matching flange only)

1988-1999 Chevrolet C1500 Silverado Pickup (OBS)
1988-1999 GMC C1500 Sierra Pickup (OBS)
1992-1994 Chevrolet Blazer (full-size)
1992-1999 Chevrolet Suburban 1500
1995-2000 Chevrolet Tahoe
1992-2000 GMC Yukon
1999-2000 GMC Yukon Denali