🔧 Sierra 1500 - Rear Brake Pad Replacement

You’ll be removing the rear wheels, taking off the rear brake calipers, swapping the pads, and putting everything back with proper torque. This restores braking power and prevents metal-on-metal damage to your rotors.

Difficulty Level: Beginner-Intermediate | Estimated Time: 1.5–2.0 hours

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⚠️ Safety & Precautions

• ⚠️ Always work on a cool brake system; hot rotors and calipers can cause severe burns.
• ⚠️ Park the truck on flat, solid ground, shift to PARK, and set the parking brake firmly.
• ⚠️ Support the truck with jack stands; never rely only on a floor jack.
• ⚠️ Wear safety glasses and mechanic gloves to protect from dust and sharp edges.
• ⚠️ Brake dust can be harmful; avoid blowing it with compressed air—use brake cleaner instead.
• ⚠️ Do not press the brake pedal with a caliper removed; it can push the piston out.
• ⚠️ Your Sierra uses a cable parking brake with a drum-in-rotor setup; normal pad replacement does not require any electronic brake service mode.
• ⚠️ Battery disconnect is not required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• 🧰 Floor jack (rated 3-ton minimum)
• 🧰 Jack stands (rated 3-ton minimum, Qty: 2–4)
• 🧰 Wheel chocks
• 🧰 22mm lug wrench or 22mm deep socket
• 🧰 Ratchet handle (3/8" drive)
• 🧰 Breaker bar (1/2" drive)
• 🧰 13mm socket
• 🧰 18mm socket
• 🧰 Torque wrench (10–200 ft-lbs range)
• 🧰 C-clamp (6" or larger) or disc brake piston tool
• 🧰 Flathead screwdriver (medium size)
• 🧰 Small wire brush
• 🧰 Bungee cord or wire hanger
• 🧰 Shop towels or rags
• 🧰 Safety glasses
• 🧰 Mechanic gloves
• 🧰 Brake cleaner spray

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Rear brake pad set - Qty: 1 (serves both rear wheels, replace in pairs)
• 🔩 Rear brake pad hardware kit (clips/shims) - Qty: 1
• 🔩 High-temperature brake grease - Qty: 1 tube
• 🔩 Brake cleaner - Qty: 1–2 cans
• 🔩 New rear caliper bracket bolts - Qty: 4 (recommended, single-use on many GM trucks)
• 🔩 Shop towels - Qty: 1 pack

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📋 Before You Begin

• 🧭 Park the Sierra on level ground, shift to PARK, set the parking brake, and chock the front wheels.
• 🧭 Loosen (do not remove) the rear wheel lug nuts with the 22mm lug wrench before lifting the truck.
• 🧭 Identify the rear frame lift points: place the floor jack under the rear axle tube or frame rails as described in your owner’s manual.
• 🧭 Keep brake cleaner and rags handy to clean any spilled grease or fluid.
• 🧭 Open the hood and locate the brake fluid reservoir; you may need to remove a little fluid if it is very full before pushing pistons back.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and support the rear of the truck

• Use the 22mm lug wrench to crack each rear lug nut loose about one turn while the truck is on the ground.
• Position the floor jack under the rear axle tube or frame rail, then pump the handle to lift the rear until both rear wheels are off the ground.
• Place jack stands under the frame rails on both sides and slowly lower the truck onto the stands using the floor jack.
• Remove the rear wheels completely using the 22mm socket and ratchet or lug wrench.
• Always shake truck slightly to confirm it’s stable.

Step 2: Inspect and prepare the brake area

• Use the brake cleaner spray to lightly spray the caliper, pads, and bracket; wipe with shop towels to remove loose dust.
• Visually inspect the rotor surface; deep grooves or heavy lip may mean rotors should also be replaced or machined.
• Take a photo of pad and hardware for reference.

Step 3: Remove the rear caliper (one side at a time)

• Locate the two caliper slide bolts on the back of the caliper.
• Use a 13mm socket and ratchet to remove the upper and lower caliper slide bolts.
• Gently pry the caliper away from the pads with a flathead screwdriver if it’s stuck.
• Lift the caliper off the bracket and hang it from the suspension spring using a bungee cord; do not let it hang by the hose.
• Hanging caliper protects flexible brake hose.

Step 4: Remove old brake pads and hardware

• Slide the inner and outer pads out of the caliper bracket with your hands or a flathead screwdriver.
• Remove the metal hardware clips from the caliper bracket using the flathead screwdriver.
• Clean the caliper bracket contact areas with a wire brush until shiny metal is visible.
• Spray a light coat of brake cleaner to remove debris and wipe dry with towels.

Step 5: Compress the caliper piston

• Place one of the old pads against the caliper piston face.
• Use a C-clamp or disc brake piston tool over the pad and the back of the caliper body.
• Slowly tighten the C-clamp to push the piston back into the caliper until it stops; this makes room for the thicker new pads.
• Watch the brake fluid reservoir under the hood to ensure it does not overflow; remove some fluid with a clean rag or syringe if needed.
• Go slowly to avoid damaging piston seals.

Step 6: Install new hardware and pads

• Install new hardware clips from the kit into the caliper bracket by hand; they should snap into place.
• Apply a very thin layer of brake grease to the areas where the pad backing will slide on the clips (do not get any on the pad friction surface or rotor).
• Install the new inner and outer pads into the bracket; make sure the pad with a wear indicator (small metal tab) matches the original pad location.
• Push the pads firmly so they sit flat and are fully seated in the clips.
• Use minimal grease; too much attracts dust.

Step 7: Reinstall the caliper

• Remove the bungee cord and position the caliper over the new pads and bracket.
• Align the caliper slide bolt holes with the bracket.
• Apply a small amount of brake grease to the slide bolt bodies if they look dry (avoid bolt threads if using threadlocker-style bolts).
• Install the upper and lower slide bolts by hand to avoid cross-threading.
• Use the 13mm socket and torque wrench to tighten the caliper slide bolts to 42 Nm (31 ft-lbs).

Step 8: (Optional but recommended) Remove caliper bracket and inspect rotor

• If you want to remove the rotor (for replacement or machining), first remove the caliper bracket.
• Use an 18mm socket and breaker bar to loosen the two large caliper bracket bolts on the back side.
• Remove the bolts completely with the 18mm socket and ratchet and lift the bracket off.
• Pull the rotor straight off the hub; if stuck, tap around the hat area with a rubber mallet.
• When reinstalling, use new caliper bracket bolts and torque them with an 18mm socket and torque wrench to 175 Nm (129 ft-lbs).

Step 9: Repeat for the other side

• Repeat Steps 3–8 on the opposite rear wheel.
• Always replace pads on both sides together.

Step 10: Reinstall wheels and lower the truck

• Reinstall each rear wheel onto the hub and hand-thread all lug nuts.
• Use the 22mm socket and ratchet to snug the lug nuts in a star pattern while still in the air.
• Use the floor jack to lift the truck slightly and remove the jack stands, then lower the truck completely to the ground.
• Use a 22mm socket and torque wrench to torque each lug nut in a star pattern to 190 Nm (140 ft-lbs).

Step 11: Set the brakes and check fluid

• With the engine off, slowly press the brake pedal several times until it feels firm; this seats the pads against the rotors.
• Check the brake fluid level in the reservoir and adjust if needed so it is between MIN and MAX.
• Clean any spilled fluid with shop towels immediately.

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✅ After Repair

• 🚗 Start the engine and press the brake pedal a few more times; it should feel firm, not spongy.
• 🚗 With the truck still in PARK, gently shift into DRIVE and REVERSE while lightly applying the brakes to confirm normal operation.
• 🚗 Perform a short, low-speed test drive (20–30 km/h) in a safe area, doing several gentle stops to bed the new pads.
• 🚗 For the first 300–500 km, avoid hard braking unless necessary; this helps the pads and rotors wear in smoothly.
• 🚗 After the test drive, check around the calipers and wheels for any unusual smells, noises, or leaks.

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💰 DIY vs Shop Cost

Shop Cost: $300–$450 (parts + labor) for rear pads on a Sierra 1500

DIY Cost: $80–$160 (parts only, depending on pad quality and hardware)

You Save: $220–$290 by doing it yourself!

Shop labor rates vary but typically run $100–$150/hour. This repair takes a shop approximately 1.0–1.5 hours.

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🎯 Ready to get started?

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