GM Parts Giant, by Genuine Parts Unlimited, Inc., is one of the largest distributors for OEM GM parts. Our online GM parts website offers customers the best 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 direct from GM and GM AC Delco. Essentially, we do not sell aftermarket parts. We ship all of our parts from region based GM dealers within three business days to provide for fast service.
Written by the business, not verified by us.GMPartsGiant.com (gmpartsgiant.com) has a 4.4 out of 5 rating on OK.one, based on 102 user reviews collected here. It is listed under Vehicles & Transportation and its reputation is good. 85% of reviews are 4 stars or higher and 14% are 1 star; The business has replied to 73% of negative reviews; Reviews mostly discuss Product, Price, Quality. Last updated 2026-08-11.
Reviewers overwhelmingly had a great experience with this company, consistently praising the overall high value offered. Customers truly appreciate the affordable pricing, great product quality, and efficient delivery services provided during their everyday online purchases. Many consumers note that finding the correct automotive components using the digital catalog is exceptionally quick, reliable, and completely straightforward. However, some people mentioned that they encountered frustrating experiences regarding high shipping expenses or unexpected price increases after placing an order. A few reviewers additionally shared that they received damaged items, or faced significant operational difficulties regarding product returns and expensive restocking fees.
Auto-generated from all reviews of this business. For reference only.Customer service was great. That is what I look for in online retail purchases.
Hi James, We appreciate you choosing us for your OEM parts needs. We’re pleased to know you had a smooth experience. Hope to serve you again soon!
Parts were exactly as they were ordered and arrived in good time.
Hello Donald, Thanks for choosing us for your parts purchase. Wishing you many smooth miles ahead.
Great company! I have bought several parts from them. Ordered new gm injectors for my pickup and motor runs smooth compared to rough with aftermarket injectors and got a great price for them. They always have the greatest price shipping is always good and would recommend.
Hello Daniel, It means a lot to hear about your experience. We appreciate your continued trust in us. Your support truly means a lot to our team.
Good price, quick shipment!
Hi George, We appreciate you taking the time to share your experience. Happy to hear everything was delivered on time. We look forward to your next order.
Part arrived on time and in good condition.
Hi Curt, We appreciate you taking the time to share your experience. We’re glad your order arrived quickly and safely. Looking forward to helping you with future OEM parts needs.
The right part, priced right and delivered quickly
Hi Kurt, Thanks for choosing us for your parts purchase. We’re glad your order arrived quickly and safely. Looking forward to helping you with future OEM parts needs.
The part I ordered was the perfect fit
Hi Lisa, We appreciate you sharing your thoughts with us. We focus on offering OEM parts with dependable fit and quality. We appreciate your support and future business.
Hi Delores, Thanks for choosing us for your parts purchase. Reliable delivery is something we take seriously. We look forward to your next order.
Damaged Part - They will not refund until I have done the following, "Contact GMPartsGiant.com for certified proof of purchase to provide your local dealer where you had the diagnostics done for option 2. here Contact GMPartsGiant.com to confirm the defect in a written diagnostic report and send the report to us for option 1. (us - This will cost more than the part, so I have disputed the charges with my credit card company to get something done. Horrible experience.
Hi C.W, Thank you for your feedback. We understand your frustration and would like to clarify that warranty claims involving potentially defective parts require a review process to determine whether the issue is due to a manufacturer defect. The documentation requested, including proof of purchase and/or a diagnostic report, are not intended to create obstacles for customers but rather to ensure that claims are reviewed fairly. We are unable to verify the cause of the issue and proceed with a warranty determination without the required documents. We appreciate your feedback and regret that the process did not meet your expectations. For more information regarding our returns policy, please visit: https://www.gmpartsgiant.com/service/gm-return_policy.html
My order was processed right away and arrived sooner than I expected.
Hi Steven, We’re glad your order arrived quickly and safely. Looking forward to helping you with future OEM parts needs.
Placed order. Tracking showed label was created. It showed not picked up by carrier for days. I called and was assured it had shipped. Then the did a search and said it was missing. Then 24hrs later the shipping company found it on the east coast. They said I had to give them seven days to find it. They would not send out a new one or refund my money while they tried to find the part and get it to me. I ordered from a different company and got it before I got the one from GM parts Giant. Now they want me to pay to ship it back to them and a 20% restocking fee. The reason they are saying I returned it is because it was no longer needed. They won’t admit it is because I had to wait for them to track down what happened. Don’t waste your time buying from this company! Still waiting to see if I actually get a refund. Humorous part I have to make sure I give them the tracking number so they know when they will get the return.
Hi Alicia, Thank you for your feedback. While shipping delays and handling issues are unfortunately outside of our direct control once the package has left our facility, we understand how frustrating this situation must be. We sincerely apologize for the inconvenience; however, the carrier's period for lost package investigation is 7 business days, and we were following the standard investigation timeframe before proceeding. We understand that, due to the delay, you chose to purchase the part elsewhere. As a result, the return was categorized as a no-longer-needed return in accordance with our returns policy. We would also like to note that we previously reached out regarding the option to use our discounted return shipping label, but have not yet received a response. Please check your inbox, including spam and junk folder. We appreciate your feedback and regret that this experience did not meet your expectations. For more information regarding our returns policy, please visit: https://www.gmpartsgiant.com/service/gm-return_policy.html
Hello Ron, Thanks for taking the time to leave a review. We’re committed to supplying OEM parts customers can trust. We look forward to serving you again!
Hello Michael, Thanks for choosing us for your parts purchase. Providing competitive pricing on OEM parts is something we work hard to maintain. We look forward to helping you again in the future!
Fit was perfect, just like the original. Not a fun job, but satisfied with the results.
Hello Tim, Thanks for taking the time to leave a review. We focus on offering OEM parts with dependable fit and quality. We’ll continue working hard to provide OEM parts you can count on.It means a lot to have your support.
You had the correct supercharger belt I needed and it was easy to order and was delivered on time. My only complaint was the shipping charge was a bit high for a single belt. Over all very pleased with the experience.
Hi Timothy, We’re happy to know you had a positive experience. We’re proud to provide genuine OEM parts customers can rely on. Looking forward to helping you with future OEM parts needs.
Good to know I can get genuine GM parts for a better price and quickly.
Hello Tamara, We’re proud to provide genuine OEM parts customers can rely on. Thanks again for choosing us.
It was the exact part that I needed, it was a perfect fit.
Hi Richard, Thanks for taking the time to leave a review. Reliability and proper fit are exactly what we aim to deliver. Looking forward to helping you with future OEM parts needs.
Hello Raul, We appreciate you sharing your thoughts with us. We truly value your business. Thank you!
Hello, We appreciate you taking the time to share your experience. Providing competitive pricing on OEM parts is something we work hard to maintain. We appreciate your continued trust in us.
Fast and as expected
Hi Laurie, We work hard to ensure orders arrive accurately and efficiently. We look forward to serving you again.
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