Who makes GM genuine parts?

GM Genuine Parts are produced by General Motors and a network of GM-approved suppliers, and are designed to match the original equipment specifications used in GM vehicles.

In the world of car maintenance, distinguishing between genuine OE parts and generic replacements matters for fit, warranty, and long-term reliability. This article explains who actually makes GM Genuine Parts and how they differ from the GM aftermarket line.

Who makes GM Genuine Parts

GM Genuine Parts (GMP) are the official replacement components for GM vehicles. They are produced by General Motors itself and by a network of approved suppliers under GM’s strict quality controls and engineering specifications. In practice, GMP come from a combination of GM-owned manufacturing facilities and contract manufacturers that operate under GM’s oversight to ensure exact OEM fit and performance.

Below is a concise outline of the key sources and process behind GM Genuine Parts:



• GM Global Parts Operations and its approved supplier network coordinate design, production, and verification to meet factory OE specifications.


• Some GMP are manufactured in GM-owned plants, ensuring alignment with the parts installed at the factory during vehicle assembly.


• Other GMP components may be produced by GM-approved contract manufacturers that operate under GM’s quality standards and technical requirements.


• All GMP are distributed through GM’s official channels, including authorized dealerships and service centers.

In short, GM Genuine Parts come from a controlled supply chain centered on General Motors, with production shared between GM facilities and carefully vetted suppliers to maintain factory-grade quality.

How GM Genuine Parts differ from GM’s aftermarket line

GM also markets a line of aftermarket parts under branding such as ACDelco, which is intended for non-GM vehicles or non-OE applications. While ACDelco parts can meet GM quality standards, they are marketed and sold as aftermarket components rather than the exact OE replacements used in factory assemblies. GMP, by contrast, are positioned as the original equipment equivalent replacements for GM vehicles and are typically used to restore a vehicle to its factory specifications.

For consumers, the distinction often translates to where the part comes from, how it was engineered, and the warranty framework. GMP are sold through GM’s official channels and are intended to match the parts installed at the factory, whereas ACDelco and other aftermarket lines are aimed at broader applications and may emphasize cost or availability rather than exact OE replication.

Verifying authenticity and where to buy

To ensure you’re getting genuine GM parts, look for branding that aligns with GM Genuine Parts labeling, verify part numbers against GM’s official parts catalogs, and purchase through GM dealers or authorized service providers. The authentic GMP packaging and serial identifiers help distinguish OE replacements from aftermarket substitutes.

Authentic GM Genuine Parts typically come with GM’s branding and part numbers, and are supported by GM’s dealer network for installation and warranty considerations. If you’re performing routine maintenance or a repair, choosing GMP helps preserve the vehicle’s original performance characteristics and warranty eligibility.

Summary

GM Genuine Parts are the official OEM replacement components for General Motors vehicles, produced by GM and a network of GM-approved suppliers under strict quality controls. They are designed to meet factory specifications and are distributed through GM’s dealerships and service centers. This differentiates GMP from GM’s aftermarket line (such as ACDelco), which is aimed at aftermarket applications and might not be exact OE replacements. When in doubt, buying through an authorized GM channel and verifying part numbers helps ensure you receive genuine GM parts that restore vehicle performance and warranty integrity.

Who supplies GM with parts?

GM Genuine Parts and ACDelco are proud to work together as the only source for true General Motors Original Equipment and aftermarket parts. Our roots empower us. ACDelco has been at the forefront of automotive innovation since the birth of GM in 1908, but a strong start in automotive wasn't enough.

Is GM Genuine Parts legit?

Is GM Parts Direct Legit? You can check these guys out too. I've had great experiences with them. Yes. They're good. Even had a return and they were solid. I highly recommend them. That's my go-to for any OEM parts and I've used them for years. Used them for years.

Is GM Genuine Parts the same as ACDelco?

No, GM Genuine Parts and ACDelco parts are not the same, but they are closely related sister brands under General Motors. GM Genuine Parts are the true original equipment (OE) parts that were installed on the vehicle during manufacturing or are validated by GM for its vehicles. ACDelco is a separate brand that offers a line of aftermarket parts, with ACDelco Gold and Silver being high-quality alternatives to OE parts, although GM Genuine Parts and ACDelco Original Equipment parts are the true OE parts.
 
GM Genuine Parts

• These are the specific parts originally designed, engineered, and tested by GM for use in its vehicles. 
• They are the same parts that are used to build a vehicle on the assembly line. 
• They fit perfectly and function precisely because they are backed by GM. 

ACDelco

• ACDelco Original Equipment: These are the same OE parts as GM Genuine Parts. 
• ACDelco Gold: A high-quality aftermarket alternative to OE parts, formerly known as the "Professional" line. 
• ACDelco Silver: A high-value, quality option for many makes and models, formerly known as the "Advantage" line. 

In summary, GM Genuine Parts are the true OE parts, while ACDelco is a brand that offers its own line of OE parts (ACDelco Original Equipment) and high-quality aftermarket parts (Gold and Silver).

What brand is GM OEM parts?

General Motors (GM) itself makes original equipment manufacturer (OEM) parts through its GM Genuine Parts and ACDelco Original Equipment brands. These parts are designed, engineered, and tested by GM for its Chevrolet, Buick, GMC, and Cadillac vehicles, and are sometimes manufactured at GM's own factories or by suppliers on its behalf. 

• GM Genuine Parts and ACDelco Original Equipment: These are the two premium brands for original equipment parts for General Motors vehicles. They are built to the exact specifications of the vehicle and are the parts that are installed during production. 
• Design and Engineering: GM designs, engineers, and tests these parts to meet rigorous standards. 
• Aftermarket Options: In addition to its OEM parts, GM also backs aftermarket parts under the ACDelco Gold and Silver lines, which are designed for a wide range of vehicles and are also quality-tested by GM, according to ACDelco.