GM Genuine Parts Front Brake Rotor
OE
Pack of 1

GM Genuine Parts Front Brake Rotor

GM Part #42942976

ACDelco Part #42942976

MSRP$158.18*

GM Genuine Parts Disc Brake Rotors are designed, engineered, and tested to rigorous standards, and are backed by General Motors.

  • Proper rotor function supports the entire hydraulic braking system
  • Delivers quiet and reliable deceleration for everyday driving
  • Friction surfaces give brake pads a solid place to grip

Pack of 1

About this product

GM Genuine Parts Disc Brake Rotors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. When your daily commute or heavy traffic driving is interrupted by annoying steering wheel vibrations or a pulsating brake pedal, it is often a sign that your braking surfaces have become warped or deeply scored. Replacing worn components with these coated disc brake rotors restores smooth, predictable stopping power by providing a clean, flat surface for the brake calipers and pads to firmly grip. These disc brake rotors mount to the wheel hub and give the brake pads a stable, true surface to clamp against, helping restore smooth, quiet deceleration and predictable stopping power in daily commuting or repeated heavy stops. GM Genuine Parts are the true OE parts installed during the production or validated by General Motors for GM vehicles.

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  • Proper rotor function supports the entire hydraulic braking system
  • Delivers quiet and reliable deceleration for everyday driving
  • Friction surfaces give brake pads a solid place to grip
  • Maintains consistent braking performance without steering wheel vibrations
  • Ensures smooth and predictable stopping power on the road
  • Dissipates heat generated during the vehicle deceleration process
  • GM engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
  • GM regularly updates production and service part designs to integrate new materials and technologies

ConstructionComposite
Surface TypeSmooth
MaterialCast Iron
Solid Or Vented Type RotorVented
ABS Sensor Ring IncludedNo
Screws IncludedNo
Outside Diameter10.86 in / 276 mm
Nominal Thickness0.98 in / 25 mm
Mounting Bolt Hole Diameter0.33 in / 8.4 mm
Pad Contact Surface Width2.16 in / 55 mm
Discard Thickness0.78 in / 20 mm
ClassificationOE
Inside Diameter6.53 in / 166 mm
Mounting Bolt Hole Quantity6
Center Hole Diameter2.36 in / 60.06 mm
Stud/Lug Hole Diameter0.59 in / 15 mm
Races IncludedNo
Overall Height10.86 in / 276 mm
Maximum Brake Diameter (Discard)0.78 in / 20 mm
Nominal Drum Diameter0.47 in / 12 mm
Mounting Bolt Hole Circle Diameter103.68mm
Grade TypeStandard Replacement
FloatingNo

24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

The following inspections and maintenance procedures can help prevent potential brake problems.

  • Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
  • Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
  • Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
  • Check the thickness of your brake pads.
  • The following should be conducted by a qualified technician:
  • Inspection of the brake hoses for brittleness or cracking.
  • Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
  • Inspection of wheel bearings and grease seals.
  • Parking brake adjustments (as needed).

Brake rotor signs of wear include:

  • Visible ridges on rotor surface.
  • Chirping, grinding, or squeaking noises when braking.
  • Difficulty stopping the vehicle.
  • A low or sinking brake pedal.
  • Braking causes the pedal and/or steering wheel to pulsate/vibrate (not to be confused with normal ABS operation.
  • Vehicle pulls to the left or right when brakes are applied.

ModelBody StyleTrimYear(s)
Bolt2027