🔧 Colorado - Rear Brake Pads & Rotor Replacement

Replacing the rear brake pads and rotors restores safe stopping and prevents grinding, vibration, and uneven braking. You’ll remove the rear wheels, swap the rotors and pads, then reassemble and torque everything correctly.

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

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⚠️ Safety & Precautions

• 🛑 Support your Colorado with jack stands on the frame; never work under a truck held only by a jack.
• 🔥 Brakes can be hot; let them cool before touching rotors/calipers.
• 🧪 Brake dust is harmful; use brake cleaner, don’t blow dust with compressed air.
• 🧯 Use wheel chocks at the front wheels; keep the truck in gear on level ground.
• 🔌 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)
• Wheel chocks
• Lug wrench or 22mm socket
• Breaker bar (1/2")
• Torque wrench (20-200 ft-lbs range)
• Ratchet (3/8")
• Ratchet (1/2")
• Socket set (metric 10mm-21mm)
• Hex key socket set (metric)
• C-clamp or disc brake piston compressor (specialty)
• Caliper hanger hook
• Wire brush
• Rubber mallet
• Flathead screwdriver
• Brake cleaner spray
• Small bungee cord
• Shop rags
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set - Qty: 1
• Rear brake rotors - Replace in pairs - Qty: 2
• Rear brake hardware kit (clips/shims) - Qty: 1
• Brake caliper slide pin grease (silicone) - Qty: 1
• Brake lubricant (pad backing/abutment) - Qty: 1
• Threadlocker (medium strength) - Qty: 1
• Brake fluid (DOT 3) - Qty: 1 quart

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📋 Before You Begin

• 🅿️ Park on level ground, put the truck in 1st gear, and set the parking brake OFF (rear brakes won’t come apart correctly if it’s on).
• 🧱 Place wheel chocks at the front tires.
• 🔓 Slightly loosen rear lug nuts using a 22mm socket before lifting.
• 🧴 Open the hood and check the brake fluid reservoir level; if it’s near “MAX,” remove a little with a clean rag (pushing pistons back can raise fluid).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the rear

• Use a floor jack (rated 3-ton minimum) to lift the rear of the truck at a solid jacking point.
• Place jack stands (rated 3-ton minimum) under the frame and lower the truck onto them.
• Give the truck a firm shake to confirm it’s stable before you remove wheels.

Step 2: Remove the rear wheels

• Remove lug nuts using a 22mm socket and breaker bar (1/2") if needed.
• Remove the wheels and set them under the frame as an extra safety backup.

Step 3: Locate the caliper and remove the caliper bolts

• Turn the steering wheel is not needed for rear brakes; just work from behind the hub.
• Remove the rear caliper slide bolts using a ratchet (3/8") and the correct metric socket set (10mm-21mm) or hex key socket set (metric) (some calipers use hex/Allen-style slide bolts).
• Tip: If it fights you, use steady pressure.

Step 4: Remove and support the caliper

• Lift the caliper off the bracket.
• Hang the caliper using a caliper hanger hook or small bungee cord.
• Do not let the caliper hang by the brake hose.

Step 5: Remove the old pads and hardware

• Slide the pads out of the bracket by hand; use a flathead screwdriver gently if they’re stuck.
• Remove the pad clips/abutment hardware from the bracket using a flathead screwdriver.
• Spray the bracket contact points with brake cleaner spray and scrub with a wire brush, then wipe with shop rags.

Step 6: Remove the caliper bracket (to free the rotor)

• Remove the caliper bracket bolts using a ratchet (1/2"), breaker bar (1/2"), and socket set (metric 10mm-21mm).
• These bolts are usually tight; keep the socket fully seated to avoid rounding.

Step 7: Remove the rotor

• Pull the rotor straight off the hub.
• If it’s stuck from rust, strike the rotor “hat” area with a rubber mallet to break it loose.
• Clean the hub face with a wire brush and wipe with shop rags so the new rotor sits flat.

Step 8: Install the new rotor

• Spray both sides of the new rotor with brake cleaner spray and wipe with shop rags (removes protective shipping oil).
• Slide the new rotor onto the hub.
• Tip: A flat hub prevents brake shake.

Step 9: Reinstall the caliper bracket

• Apply threadlocker (medium strength) to the bracket bolt threads.
• Install and tighten bracket bolts using a ratchet (1/2") and socket set (metric 10mm-21mm).
• Torque to 170 Nm (125 ft-lbs).

Step 10: Install new hardware and pads

• Install new pad clips from the rear brake hardware kit (clips/shims) into the bracket.
• Apply a thin film of brake lubricant (pad backing/abutment) where the pad ears slide on the clips.
• Install the new pads into the bracket by hand.
• Tip: Don’t get lube on pad friction surfaces.

Step 11: Service the slide pins

• Pull the slide pins out of the bracket (they are the smooth pins the caliper floats on).
• Wipe them clean with shop rags and apply brake caliper slide pin grease (silicone).
• Reinsert the pins and confirm they move smoothly.

Step 12: Compress the caliper piston

• Use a C-clamp or disc brake piston compressor (specialty) to slowly push the caliper piston back in.
• Watch the brake fluid reservoir as you compress; don’t let it overflow.
• Tip: Go slow to avoid damaging seals.

Step 13: Reinstall the caliper

• Place the caliper over the new pads and align the slide bolt holes.
• Install slide bolts using a ratchet (3/8") and correct socket set (metric 10mm-21mm) or hex key socket set (metric).
• Torque to 35 Nm (26 ft-lbs).

Step 14: Reinstall wheels and torque lug nuts

• Install wheels and hand-thread lug nuts.
• Lower the truck off the stands using the floor jack (rated 3-ton minimum).
• Tighten lug nuts in a star pattern using a torque wrench (20-200 ft-lbs range).
• Torque to 190 Nm (140 ft-lbs).

Step 15: Pump the brake pedal

• With the engine OFF, press the brake pedal 10-15 times until it feels firm.
• This seats the pads against the rotors after piston compression.

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✅ After Repair

• 🔍 Check brake fluid level and top off with DOT 3 if needed.
• 🧪 Start the engine and confirm the pedal feels normal (not sinking).
• 👂 Test drive at low speed first; listen for scraping or clunks.
• 🛑 Bed-in the pads: make 6-10 moderate stops from 30 mph to 5 mph, letting brakes cool a bit between stops.
• 🕵️ Re-check lug nut torque with a torque wrench (20-200 ft-lbs range) after 50-100 miles.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

DIY Cost: $180-$400 (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?

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