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- Rear Disc Brake Rotor
Part TypeBrake Rotor
BrandACDELCO
Package Height3.62
Package Width14.5
Package Length15.12
Weight19.0 PG
Weight22.15
Center Hole Diameter71
Good Maintenance Practices - Section 1 - Bullet 1Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
Directional Or Non-Directional Brake SurfaceNon-Directional
Number Of Lugs6
Disc ConstructionVented
Good Maintenance Practices - Section 1 - Bullet 4Check the thickness of your brake pads.
Good Maintenance Practices - Section 1 - Bullet 2Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
Max Center Hole Diameter2.79 in (70.866 mm)
Abs Sensor Ring IncludedNo
Good Maintenance Practices - Section 1 - Bullet 3Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
Disc FinishGround
Pad Contact Surface Width (Mm)36.6
Stud/Lug Hole Quantity6
Center Hole Diameter (Mm)70.74
Product DescriptionGM Genuine Parts Disc Brake Rotors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts OE Brake Rotors are the true OE parts installed during production or validated by General Motors for GM vehicles. GM engineers spent many years developing, testing, and validating brake rotor solutions for each brake corner for every GM vehicle. GM Genuine OE rotors are designed, engineered, tested to rigorous standards and backed by General Motors.GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠<b> WARNING:</b> Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Bolt Circle Diameter (Mm)115
Overall Rotor Diameter (Mm)320
ConstructionFull Cast
Nominal Thickness (Mm)26
Width (In)14.3
Pad Contact Surface Width1.4
Hat FinishBare
Overall Rotor Diameter12.6 in (320 mm)
Mounting Bolt Hole Circle Diameter115
Length (In)15.1
Pitch Circle Diameter (Mm)115
Abs Tone Ring IncludedNo
Discard Thickness (Mm)24.00
Overall Height (Mm)47.9
Surface TypeSmooth
Bolt Circle Diameter (In)4.528
PositionRear
Outside Diameter320
Part CategoryReplacement Parts
Overall Height47.9
Pitch Circle Diameter4.53 in (115.1 mm)
Good Maintenance Practices - Section 2 - Bullet 3Inspection of wheel bearings and grease seals.
Good Maintenance Practices - Section 2 - Bullet 4Parking brake adjustments (as needed).
Programming RequiredNo
Thickness (Mm)26
Discard Thickness24
Thickness1.023 in (26 mm)
Bolt Circle Diameter4.528
Stud/Lug Hole Diameter0.51
Good Maintenance Practices - Section 2 - Bullet 1Inspection of the brake hoses for brittleness or cracking.
Features &#38; Benefits - Bullet 10GM regularly updates production and service part designs to integrate new materials and technologies
Outside Diameter (Mm)320
Good Maintenance Practices - Section 2 - Bullet 2Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
Includes Abs Sensor RingNo
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 1Visible ridges on rotor surface.
Max Bolt Hole Diameter (Mm)13
Signs Of Wear &#38; Troubleshooting - Section 1 - HeaderBrake rotor signs of wear include:
Features &#38; Benefits - Bullet 6Designed to meet GM resonant frequency separation requirements to help reduce the risk of brake noise
Features &#38; Benefits - Bullet 7Designed to customer vehicle parameters to resist thermal roughness
Inside Diameter7.49
Features &#38; Benefits - Bullet 8GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
Features &#38; Benefits - Bullet 9GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
Max Center Hole Diameter (Mm)70.75
Features &#38; Benefits - Bullet 2OE brake components are specifically designed to work with your GM vehicle safety systems
Max Bolt Hole Diameter0.511 in (12.979 mm)
Bolt Hole Quantity6
Features &#38; Benefits - Bullet 3FNC rotors are hardened and strengthened during an extended manufacutirng process that helps provides an extra defensive barrier against the corrosive threat of water, sale, and even acid rain
Features &#38; Benefits - Bullet 4OE brake systems and components are required to meet Federal Motor Vehicle Safety Standards (FMVSS)
Features &#38; Benefits - Bullet 5Carbon ceramic brake rotors are used in high performance vehicles because the carbon fibers provide strength and the ceramic rotors are lighter than standard iron
Height (Mm)47.9
Features &#38; Benefits - Bullet 1Most GM OE brake rotors sold in the U.S are Ferritic Nitro-Carburized, or FNC rotor
Solid Or Vented Type RotorVented
Good Maintenance Practices - Section 1 - HeaderThe following inspections and maintenance procedures can help prevent potential brake problems.
Good Maintenance Practices - Section 1 - Bullet 9The following should be conducted by a qualified technician:
MaterialCast Iron
Bearings IncludedNo
Stud/Lug Hole Circle Diameter4.53
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 6Vehicle pulls to the left or right when brakes are applied.
Height (In)1.9
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 2Chirping, grinding, or squeaking noises when braking.
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 3Difficulty stopping the vehicle.
Rust Resistant CoatingYes
SlottedNo
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 4A low or sinking brake pedal.
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 5Braking causes the pedal and/or steering wheel to pulsate/vibrate (not to be confused with normal ABS operation.
Part FitmentDirect Fit
Nominal Thickness1.02
Grade TypeOE
Vendor Part Number177-0911
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
