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. Our online GM parts website offers customers discounted prices on OEM Chevrolet parts, GMC parts, Cadillac parts, and Buick parts. OEM stands for Original Equipment Manufacturer. In other words, it simply means our parts come directly from GM and GM AC Delco. We do not sell aftermarket parts. We ship all of our parts from regional-based GM dealers within three business days providing fast service.

Meeting and exceeding your needs is 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. Initiating returns is simple and hassle-free. Learn more about our Return Policy by clicking here.

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

What Our Customers Say

• "Thank you for your quick response to my order. Part No.: 25891526 SWITCH,I/P LP DIMR worked perfectly. I tried getting this part from a local GM parts dealer and after waiting for 3 weeks, I asked for a refund and went through you. Best decision ever!"

  tonigx, 2023-02-28

• "I ordered the fan and fan clutch after having installed aftermarket parts which increase the noise levels or the fan making it so loud at speeds under 40 mph that I couldn't think. Was like the sound of a school bus. I ordered the genuine GM parts and now the Hummer is as quiet as it was before. Thank you."

  AdorableArmadillo-94807, 2022-08-06

• "Was in need of a brake pedal assembly for my wife's car. Every place else I looked on line was out of stock. Local Cadillac dealer quoted me over twice as much and said it's on back order with no release date. Ordered from here and part was delivered in a few days. Looks correct, but will be installing this weekend. Thank you GM parts Giant, will use you again. I like to buy local, but for half price when the car is down, you are my new go to. I was told about you by my new service writer in my independent shop."

  LightGiraffe-10791, 2022-07-23

Excellent Seller Ratings

4.34/5 of 3376 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.