E
Emma S.Verified Buyer
12/14/2025
Exactly what I needed
Easy to order and arrived quickly. Product matched the listing and works great.
ACDelcoACDelco Gold 1280 mm Serpentine Belt 6K503A
$152.99
FREE delivery · Delivery by Oct 20
- Free shipping over $25
- Next-business-day ship
- Easy returns
Guides & Resources
Product guides for this item are not available online yet. Contact us if you need documentation.
Shipping Information
Free shipping on orders over $25. Most items ship next business day after your order is placed.
Returns Policy
Returns are accepted when the product is in its original, unopened container. Contact us if you have questions about your order.
Product facts
About This Item
- Drive multiple engine accessory components efficiently with the multi-ribbed 6-rib design that powers your alternator, power steering pump, and water pump.
- Enjoy a long life and quiet, dependable performance through temperature and crack-resistant Ethylene Propylene Terpolymer (EPDM) rubber construction.
- Transmit load efficiently throughout your accessory belt drive system using precision dimension control of the rib profile.
- Maintain optimal accessory operation and minimize loss of tension with flexible construction designed for reliable daily performance.
- Solve problem applications and reduce noise with quality materials designed for standard replacement needs.
- Fit your General Motors vehicle or most other makes and models with a premium aftermarket replacement part built to exact specifications.
Details
Product Description
Keep your engine running smoothly with the ACDelco Gold Serpentine Belt 6K503A, a high-quality replacement designed to drive multiple accessories efficiently. This multi-ribbed belt powers essential components like the alternator, power steering pump, and water pump, helping your engine operate at optimum levels. Crafted from temperature and crack-resistant Epsilon Propylene Terpolymer rubber with an aramid cord, it delivers long-lasting durability, minimizes noise, and prevents loss of tension for quiet, dependable performance. This standard replacement part requires installation tools and is manufactured to meet specifications for General Motors vehicles as well as most makes and models. Backed by a 36-month warranty.
Technical data
Product Specifications
- Part #
- 6K503A
- SKU #
- 1724143
- Instruction Manual Included
- No
- Color
- Black
- Installation Tools Requirements
- Yes
- Rib Quantity
- 6
- Outside Circumference
- 1300 mm
- Cord Material
- Aramid
- Grade Type
- Premium
- Material
- Ethylene Propylene Terpolymer (EPDM)
- Top Width
- 20 mm
- Effective Length
- 1280 mm
- Belt Material
- EPDM
- Cross Section Designation
- K
- Type
- Standard
Brand
Brand Story
Since 1974
Brakes
ACDelco
General Motors’ service-parts brand
ACDelco is General Motors’ aftermarket parts brand, formed in 1974 from the AC Spark Plug and United Delco businesses. The line covers batteries, brakes, filters, and ignition parts sold at District Mailing Auto.
Shop ACDelcoHeritage
1974
GM combined the AC Spark Plug and United Delco businesses under the ACDelco name in 1974.
Parts
Service lineup
The brand covers batteries, brake parts, filters, and ignition components.
Storefront
At District Mailing Auto
Shop the ACDelco products currently in the catalog.
Customer Reviews
4.3
Based on 3 reviews
D
Dana H.Verified Buyer
10/02/2025
Solid purchase
Quality feels premium and it fits my needs well.
A
Alex P.Verified Buyer
01/09/2025
Fast shipping too
Impressed with the quality for the price. Will be back for more.