What is GM parts brand?
GM parts brand refers to General Motors’ official parts families: GM Genuine Parts (the original equipment replacement parts) and ACDelco (GM’s global aftermarket parts brand).
GM Genuine Parts: Official OE replacements
GM Genuine Parts are the OEM-grade components GM designs or approves to replace parts on GM vehicles. They are engineered to match the exact specifications of the parts that came on the car from the factory and are typically sold through GM dealerships and authorized retailers.
- Original Equipment (OE) replacement parts approved by General Motors
- Manufactured to GM specifications and tested for fit, form, and function
- Widely stocked by GM dealerships and authorized distributors for timely repairs
- Warranty and service terms aligned with GM’s OE policies
GM Genuine Parts are intended to maintain or restore factory performance and should be preferred for critical components or when preserving warranty coverage.
Availability and scope
GM Genuine Parts cover components across GM brands including Chevrolet, GMC, Cadillac, Buick, and others, spanning engines, transmissions, brakes, electrical, body, and more.
ACDelco: GM’s global aftermarket parts brand
ACDelco is GM’s aftermarket parts brand and portfolio, offering parts for GM and non-GM vehicles. It provides a broad range of parts through a network of independent auto parts stores, repair shops, and GM dealerships worldwide.
- Broader product range for GM and non-GM vehicles, including braking, electrical, filters, ignition, and more
- Multiple product lines to fit different budgets and performance needs, such as Professional (OE-equivalent), Gold (premium), and Advantage (economical)
- Widely available through independent retailers and service centers, as well as GM channels
- Warranty terms vary by product line and market, usually aligning with consumer expectations for aftermarket parts
ACDelco parts aim to offer reliable performance and accessibility for a wide range of vehicles, while maintaining close collaboration with GM for compatibility on GM products.
Lines and compatibility
The ACDelco line-up is designed to cover many systems—engine, fuel, cooling, electrical, steering, suspension—with parts that fit GM and many non-GM models, offering choices from budget to premium quality.
Choosing between GM Genuine Parts and ACDelco
For GM-specific maintenance, GMP deliver OE-grade replacements with guaranteed compatibility and factory-style performance. ACDelco provides flexibility, often at lower price points and with a wider distribution network, suitable for independent shops or owners seeking availability beyond GM’s own dealer network. Consider vehicle age, warranty coverage, and desired level of OEM fidelity when choosing between the brands.
Where to buy and warranty overview
Both GMP and ACDelco parts can be purchased through GM dealerships, authorized distributors, and many independent auto parts retailers. Warranties vary by part type and market, so check the specific product warranty at the time of purchase.
Summary
GM Genuine Parts are General Motors’ official Original Equipment replacement parts, designed to match factory specifications and typically sold through GM channels. ACDelco is GM’s global aftermarket brand, offering a broad range of parts for GM and non-GM vehicles with multiple pricing and quality tiers. Together, they cover the spectrum of maintenance and repair needs for GM vehicles, balancing OEM fidelity with aftermarket accessibility.
