🔧 Ascent - Front Brake Pads & Rotor Replacement

You’ll remove the front wheels, swap the worn brake pads and rotors, then reassemble and torque everything correctly. New rotors give the new pads a smooth, flat surface so braking stays quiet and strong.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours

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⚠️ Safety & Precautions

• 🛑 Work on level ground and support the vehicle with jack stands—never rely on a jack alone.
• 🧤 Wear safety glasses and gloves; brake dust and cleaner are irritating.
• 🔥 Brakes can be extremely hot—let them cool before touching.
• 🧷 Do not let the caliper hang by the brake hose; support it with a hanger/strap.
• 🔍 After reassembly, pump the brake pedal before driving or you may have no brakes on first press.
• 🔋 Battery disconnect is not required for this front brake 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)
• Wheel chocks
• 19mm socket
• Breaker bar (1/2" drive)
• Torque wrench (1/2" drive, 20-150 ft-lbs range)
• 14mm socket
• 17mm socket
• Ratchet (3/8" drive)
• C-clamp (6" minimum)
• Caliper hanger hook
• M8 x 1.25 bolts (2-pack)
• Flat blade screwdriver
• Rubber mallet
• Wire brush
• Brake parts cleaner
• Shop towels
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front brake pad set - Qty: 1
• Front brake rotors - Replace in pairs - Qty: 2
• Front brake hardware kit (abutment clips) - Qty: 1
• High-temperature silicone brake grease - Qty: 1
• Brake cleaner - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Place wheel chocks behind the rear wheels.
• Loosen the front lug nuts 1/2 turn using a 19mm socket and breaker bar before lifting.
• Open the hood and check the brake fluid level; it may rise when you push the caliper piston back. If it’s near “MAX,” remove a little with a clean towel (do not spill on paint).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the front end

• Use a floor jack (rated 3-ton minimum) to lift the front of your Ascent at the proper front lift point.
• Set the vehicle onto jack stands (rated 3-ton minimum) and gently rock the vehicle to confirm it’s stable.

Step 2: Remove the front wheels

• Remove the lug nuts using a 19mm socket and ratchet.
• Remove both front wheels and set them aside.

Step 3: Remove the caliper (do not stretch the hose)

• Turn the steering wheel to give yourself more space at the caliper.
• Remove the caliper slide pin bolts using a 14mm socket and ratchet.
• Lift the caliper off the bracket. If it’s tight, gently pry with a flat blade screwdriver.
• Hang the caliper using a caliper hanger hook.
• Never hang caliper by the hose.

Step 4: Remove old pads and hardware

• Pull the brake pads out of the bracket by hand.
• Remove the pad abutment clips (hardware) from the bracket.
• Clean the bracket pad “tracks” with brake parts cleaner and a wire brush.

Step 5: Remove the caliper bracket

• Remove the caliper bracket bolts using a 17mm socket and breaker bar.
• Set the bracket aside.
• When reinstalling later: Torque to 114 Nm (84 ft-lbs)

Step 6: Remove the rotor

• If the rotor is stuck, thread two M8 x 1.25 bolts into the rotor’s extraction holes evenly, alternating turns until the rotor “pops” loose.
• If needed, tap the rotor hat lightly with a rubber mallet to help it release.
• Remove the rotor.

Step 7: Prep the hub and install the new rotor

• Clean rust from the hub face using a wire brush and brake parts cleaner. A clean hub helps prevent rotor wobble and pedal pulsation.
• Clean both sides of the new rotor with brake parts cleaner and shop towels (this removes protective oil).
• Install the new rotor onto the hub.

Step 8: Reinstall the caliper bracket

• Reinstall the bracket and start the bolts by hand.
• Tighten using a 17mm socket and torque wrench.
• Torque to 114 Nm (84 ft-lbs)

Step 9: Install new hardware and pads

• Install the new abutment clips from your hardware kit onto the bracket.
• Apply a thin film of high-temperature silicone brake grease where the pad ears touch the clips (not on pad friction material).
• Slide the new pads into place.

Step 10: Compress the caliper piston

• Use a C-clamp (6" minimum) to slowly push the caliper piston back in.
• Go slowly and keep the piston straight so it doesn’t bind.
• Keep an eye on the brake fluid reservoir while compressing.
• Slow compression helps protect seals.

Step 11: Reinstall the caliper

• Place the caliper over the new pads.
• Install the slide pin bolts using a 14mm socket and torque wrench.
• Torque to 27 Nm (20 ft-lbs)

Step 12: Reinstall wheels and lower the vehicle

• Reinstall the wheels and hand-tighten lug nuts.
• Lower the vehicle using the floor jack (rated 3-ton minimum).
• Tighten lug nuts in a star pattern using a 19mm socket and torque wrench.
• Torque to 120 Nm (89 ft-lbs)

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✅ After Repair

• With the engine OFF, pump the brake pedal 10-15 times until it feels firm.
• Check brake fluid level and top off only if needed (use the correct DOT brake fluid listed on the reservoir cap).
• Start the engine and confirm the pedal stays firm.
• Do a low-speed test in a safe area. Confirm no pulling, grinding, or warning lights.
• Pad bedding (recommended): do 6-8 moderate stops from 40 mph to 10 mph, allowing a little cooling time between stops. Avoid hard stops for the first 200 miles.

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💰 DIY vs Shop Cost

Shop Cost: $450-$800 (parts + labor)

DIY Cost: $180-$350 (parts only)

You Save: $270-$450 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.