🔧 Terrain - Rear Brake Pad Replacement

Replacing the rear brake pads means removing the rear wheels, moving the rear caliper out of the way, swapping the pads (and hardware clips), then reassembling with the correct torque. On your Terrain, the key detail is whether the rear calipers use an Electronic Parking Brake (EPB), because the piston can’t be pushed back normally unless the EPB is put into service mode.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

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⚠️ Safety & Precautions

• ⚠️ Support the vehicle on jack stands; never rely on a jack alone.
• ⚠️ Chock the front wheels so the vehicle can’t roll.
• ⚠️ If equipped with EPB, do not force-compress the rear caliper piston without EPB service mode.
• ⚠️ Brake dust is harmful—use brake cleaner, not compressed air.
• ⚠️ Keep brake fluid off paint; it damages finishes quickly.
• Battery disconnect is not required, but keep the ignition OFF while working around EPB.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (pair, rated 3-ton minimum)
• Wheel chocks
• 21mm socket
• 1/2" drive breaker bar
• 1/2" drive torque wrench (20-200 ft-lbs range)
• 3/8" drive ratchet
• 3/8" drive torque wrench (10-80 ft-lbs range)
• Socket set (metric, 8mm-18mm)
• 7mm hex bit socket
• Wire brush
• Brake caliper hanger hook
• C-clamp (6")
• Trim/pick tool
• Brake parts cleaner
• Nitrile gloves
• Safety glasses
• Scan tool with GM EPB service mode (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set - Qty: 1
• Rear brake pad hardware/abutment clip kit - Qty: 1
• Brake caliper slide pin grease (high-temp silicone) - Qty: 1
• Brake cleaner - Qty: 1

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📋 Before You Begin

• Park on level ground, set the transmission to P, and place wheel chocks at the front tires.
• Loosen the rear lug nuts 1/2 turn before lifting the vehicle (use a 21mm socket and breaker bar).
• Open the hood and remove the brake fluid reservoir cap (place it back on loosely). This helps fluid return when pistons retract.
• If your Terrain has an Electronic Parking Brake (EPB) switch, plan to use EPB service mode before compressing the rear pistons.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the rear of the vehicle

• Use a floor jack to lift at the approved rear lift point, then set the vehicle onto jack stands.
• Give the vehicle a gentle push to confirm it’s stable before you work.

Step 2: Remove the rear wheels

• Use a 21mm socket and ratchet to remove the lug nuts, then remove both rear wheels.
• Doing both sides helps you compare parts.

Step 3: Put the parking brake system in the correct state

• If equipped with EPB: connect your scan tool with GM EPB service mode (specialty) and command Electronic Parking Brake > Service Mode (wording varies by scan tool).
• If not equipped with EPB: confirm the parking brake is fully released and the rear wheels spin freely by hand.
• Do not proceed to piston compression until this step is correct.

Step 4: Remove the rear caliper (slide pin bolts)

• Turn the steering wheel is not applicable; just position yourself for access behind the caliper.
• Use a 7mm hex bit socket with a 3/8" ratchet to remove the two caliper slide pin bolts.
• Lift the caliper off the bracket and support it with a brake caliper hanger hook.
• Never let the caliper hang by the brake hose.

Step 5: Remove the old pads and hardware clips

• Pull the inner and outer pads out by hand. If they’re stuck, use a trim/pick tool to gently pry.
• Remove the pad hardware/abutment clips from the bracket using a trim/pick tool.
• Use brake parts cleaner and a wire brush to clean the pad “shelves” where the clips sit.

Step 6: Retract the caliper piston

• Place the old inner pad against the piston face to spread the force.
• Use a C-clamp (6") to slowly press the piston back until it bottoms out.
• Watch the brake fluid reservoir level while compressing; remove excess fluid if it starts to overflow.
• If the piston will not move smoothly: stop and re-check EPB service mode with the scan tool.

Step 7: Install new hardware clips and new pads

• Install the new hardware clips into the bracket by hand (use a trim/pick tool only if needed to seat them).
• Apply a thin film of brake caliper slide pin grease (high-temp silicone) to the pad contact points on the clips (metal-to-metal only).
• Slide the new inner and outer pads into place. They should move freely in the clips.

Step 8: Reinstall the caliper and torque fasteners

• Position the caliper over the new pads.
• Install the caliper slide pin bolts by hand first to avoid cross-threading.
• Use a 3/8" torque wrench with a 7mm hex bit socket and Torque to 35 Nm (26 ft-lbs).

Step 9: Refit wheels and torque lug nuts

• Reinstall the wheels and hand-thread all lug nuts.
• Lower the vehicle off the jack stands using the floor jack.
• Use a 1/2" torque wrench with a 21mm socket and Torque to 140 Nm (103 ft-lbs) in a star pattern.

Step 10: Take the parking brake out of service mode (if equipped)

• Use the scan tool with GM EPB service mode (specialty) to command Electronic Parking Brake > Apply/Exit Service Mode.

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✅ After Repair

• Before driving, pump the brake pedal 10-15 times until it feels firm. This seats the pads against the rotors.
• Check the brake fluid level and install the reservoir cap securely.
• With the vehicle in a safe area, do a slow-speed brake test (5-10 mph) to confirm normal stopping and no noises.
• Pad break-in: make 6-10 moderate stops from ~30 mph to ~5 mph, letting brakes cool 30-60 seconds between stops.
• If you hear grinding, or the wheel gets abnormally hot, stop and re-check pad fit and caliper movement.

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💰 DIY vs Shop Cost

Shop Cost: $350-$600 (parts + labor)

DIY Cost: $60-$150 (parts only)

You Save: $200-$450 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-3.0 hours.

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🎯 Ready to get started?

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