GM Parts Giant We sell OEM GM parts worldwide

GM Parts Giant, by Genuine Parts Unlimited, Inc., is one of the largest distributors of OEM GM parts. Customers can find discounted OEM parts for Chevrolet, GMC, Cadillac, and Buick vehicles through our GM parts online store. We provide authentic and quality parts straight from GM Genuine Parts. We do not sell aftermarket parts. We source our parts from authorized GM dealers and strive to process and ship orders as quickly as possible to get them to you in a timely manner.

Meeting and exceeding your needs are our #1 goal

For over ten years, our team has been dedicated to our commitment to our customers. We know customers have high expectations, at GMPartsGiant we enjoy the challenge of meeting and exceeding our customer's needs each and every day. Our core values for success continue to demonstrate our loyalty by building dedicated relationships with all of our current and future customers.

Finding the right part has never been easier

We want to thank you for visiting our genuine OEM GM parts catalog. Feel free to contact us via email, live chat, or over the phone so we can help you in every way possible. Starting a return is straightforward and easy. Learn more about our Return Policy by clicking here.

• Competitive Prices
• Quick Shipping Time
• Stellar Customer Service
• Part Fitment Verification

What Our Customers Say

• "My old air cleaner box had about disintegrated. I don't know what material GMC used back then, but it didn't last the life of the vehicle. The new one I ordered from GMPartsGiant was brand new and came with a new filter and cover screws. Price was only slightly higher than comparable parts houses, but that okay for an OEM part. Shipping was timely. Good company to work with. Dave"

  Reviewer, 2025-04-05

• "They had the OE part I needed, that was discontinued by GM, so it was a perfect fit. Super fast delivery, got my Vette back on the road."

  Jollimon, 2025-04-03

• "The order and subsequent delivery went through without a hitch. All parts were as ordered.I'm happy with my purchase."

  GlamorousEarthworm, 2025-03-24

Excellent Seller Ratings

4.01/5 of 3391 reviews

We have earned a reputation for honesty, integrity, and value. With thousands of 5-Star reviews we are the leading online retailer of GM parts in the USA.