ACDelco 18A2805 | Rear Disc Brake Rotor

Part Number
Rear Brake Rotor

Fits: 11-21 Chevrolet Silverado 2500 HD, 11-21 Chevrolet Silverado 3500 HD, 11-20 GMC Sierra 2500 HD, 11-20 GMC Sierra 3500 HD, 16-19 Chevrolet Suburban 3500 HD

Special Price $124.19 Regular Price $137.99
In stock
Only 4 left
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Estimated Ship Date: 1 Business Day or Less
Rear Disc Brake Rotor



  • Rear Brake Rotor
  • Abs Components;Brake;Brake Caliper;Brake Caliper Lubricant;brake care;Brake Fluid;Brake Pad;Brake Parts;Brake Rotor;Brake Shoe;brakes care;Caliper;Drums;Durastop Brake Pads;Durastop Brake Parts;Durastop Ceramic Brake Pads;Low Voc Brake Parts Cleaner 15oz;Low Voc Brake Parts Cleaner 16oz;luxury hybrid brake pads;oem Brakes;Pads And Shoes;Rotor;Silicone Brake Lubricant


ABS Tone Ring IncludedNo
Bolt Hole Quantity8
ConstructionFull Cast
Disc FinishGround
Discard Thickness1.28
FAQ - A1Yes, ACDelco also offers GM OE brake rotor and Advantage brake rotors.
FAQ - Q1Does ACDelco offer other grades of brake rotors?
Features & Benefits - B1Inspected for balance; resulting in smooth brake operation and noise reduction
Features & Benefits - B2Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products
Features & Benefits - B3Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reducing noise and vibration
Good Maintenance Practices - S1 B1Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
Good Maintenance Practices - S1 B2Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
Good Maintenance Practices - S1 B3Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
Good Maintenance Practices - S1 B4Check the thickness of your brake pads.
Good Maintenance Practices - S1 HThe following inspections and maintenance procedures can help prevent potential brake problems:
Good Maintenance Practices - S2 B1Inspection of the brake hoses for brittleness or cracking.
Good Maintenance Practices - S2 B2Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
Good Maintenance Practices - S2 B3Inspection of wheel bearings and grease seals.
Good Maintenance Practices - S2 B4Parking brake adjustments (as needed).
Good Maintenance Practices - S2 HThe following should be conducted by a qualified technician:
Hat FinishTurned
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Marketing Statement - Product LineBrakes are one area in which vehicle owners simply cannot compromise. With ACDelco Brakes, they can get the peace of mind that comes with parts that are expertly engineered, manufactured to stringent tolerances, thoroughly tested and backed by the ACDelco name. Choose from our GM Original Equipment, Professional, Advantage, and Specialty Series brake products to meet your performance needs and budget. For your GM and non-GM vehicles, trust ACDelco rotors, pads, drums, and other brake components to help keep you and your loved ones safe.
Marketing Statement - Sub BrandACDelco Professional, premium aftermarket, Brake products mean no compromises and quality at a fair price. ACDelco also offers select Specialty Brake products for Fleet and Police applications as well. Whether you call on our brake pads, brake shoes, rotors or drums, you can rest assured that ACDelco will give you the stopping power you need. And, with our warranty coverage, you will have the confidence and peace of mind that comes with owning ACDelco products.
MaterialCast Iron
Mkt_BrandQual_NameFully Coated
Mkt_State_Warranty_CA24 Months/40,000 KM (Parts Only). Please see for more details.
Mkt_State_Warranty_US24 Month / Unlimited Mile Limited Warranty (Parts Only). Please see for more details.
Nominal Thickness1.339
Outside Diameter14.2
Pad Contact Surface Width1.9
Product DescriptionACDelco Professional Disc Brake Rotors provide reliable vehicle braking power and are a high quality replacement for many vehicles on the road today. They feature a thickness variation that is less than 0.0004 to minimize pedal pulsation, noise, and help to extend brake pad life. These rotors meet the SAE standard for structural integrity with OE matched G3000 qualified material delivering guaranteed performance. Also, no machining is required. ACDelco Advantage Disc Brake Rotors are ready to be installed right out of the box.
Programming RequiredNO
Rust Resistant CoatingYes
Signs of Wear & Troubleshooting - S1 B1Brake pedal pulsation (not to be confused with normal ABS operation).
Signs of Wear & Troubleshooting - S1 B2Squealing or grinding noises.
Signs of Wear & Troubleshooting - S1 B3Low brake pedal height.
Signs of Wear & Troubleshooting - S1 B4Vehicle pulls to the left or right when brakes are applied.
Signs of Wear & Troubleshooting - S1 B5Visible ridges or deep grooves on the rotor surface.
Signs of Wear & Troubleshooting - S1 HBrake rotor signs of wear include:
Solid Or Vented Type RotorVENTED
Surface TypeSMOOTH



  • 2011-2020 GMC Sierra 2500 HD - Position: Rear
  • 2015-2021 Chevrolet Silverado 3500 HD - Position: Rear
    • Single Rear Wheels
  • 2011-2021 Chevrolet Silverado 2500 HD - Position: Rear
  • 2015-2020 GMC Sierra 3500 HD - Position: Rear
    • Single Rear Wheels
  • 2011-2014 GMC Sierra 3500 HD - Position: Rear
    • w/o Dual Rear Wheels
  • 2011-2014 Chevrolet Silverado 3500 HD - Position: Rear
    • w/o Dual Rear Wheels
  • 2016-2019 Chevrolet Suburban 3500 HD - Position: Rear
Customer Questions
Does AC Delco make Ford parts?
No, AC Delco produces parts primarily for General Motors vehicles and does not make parts specifically for Ford vehicles.
Can I use AC Delco parts to replace OEM parts?
Yes, in most cases AC Delco parts can be used as a replacement for OEM parts. However, it's important to ensure that the parts are compatible with your specific make and model of vehicle.
What AC Delco oil filter do I need?
AC Delco offers a variety of oil filters that are compatible with different makes and models of vehicles. To determine which AC Delco oil filter you need, consult your vehicle's owner's manual or use our online filter lookup tool that matches the make, model, and year of your vehicle.
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