The only negative about the process was the shipping cost vs delivery time. The cost was steep for the amount of time it took to arrive.
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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.
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Contact info
United States
- 888-737-9766
- support@gmpartsgiant.com
- gmpartsgiant.com
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Replied to 84% of negative reviews
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Great transaction and awesome product…
Great transaction and awesome product as described! Fast and safe shipping!

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Updated : One of the parts arrived broken
Update. My review and issue was actually with another site (also stars with GMParts…) and not with GMPartsGiant. I looked again after they reached out to offer me a refund. Well played on their part! They seem like a good company that cares about their reputation.
Original:
One of the parts arrived broken, but since it was an $8 part, the cost to arrange a replacement was higher cost to me than just buying a new one from someone who would pack it with a little more care.

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You had the right part I needed in…
You had the right part I needed in stock and delivered it in a timely fashion

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Every thing worked out with my Order…
Every thing worked out with my Order and thanks for all the help in getting the correct parts for my truck.

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Website was very easy and helpful to…
Website was very easy and helpful to use. Great prices with fast shipping

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Great price and the front spoiler/lip…
Great price and the front spoiler/lip was exactly what I was looking for

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Avoid this site
Advertised 1-3 days processing and shipping. Took 16 days for them to ship. No email or notification of delay. No compensation for complication. A poor attitude customer service representative and paid $65 for 3 week shipping of a plastic wheel well liner. Avoid if possible

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Ordered 5w30 trans fluid and received…
Ordered 5w30 trans fluid and received 75w 80. They won’t accept returns for fluid, and they won’t refund me after stringing me along for 2 weeks. They even tried to act like these two viscosities are interchangeable and ultimately denied my claim. Do not use these people, they literally scammed me out of 70$ and I’m trying to get my money back through the bank now.

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misleading site inventory and delayed my repairs week
My experience with GMPartsGiant was nothing short of aggravating. I placed an order for parts that were clearly listed as “in stock” on their website, only to have it canceled several days later due to “availability issues.” The site was never updated to reflect the shortage, which felt misleading.
When I tried to get answers, I was told to call — but their phone system simply redirected me without connecting to a real person. The online chat option was a joke, total waste of time leaving me with no direct way to resolve the problem. request supervisor multiple times, never granted even after multiple reps through chat.
Adding to the frustration, they kept a hold on my bank card for several days after canceling the order and refused to release it sooner. This tied up my funds unnecessarily and caused a major inconvenience.
Overall, the outdated inventory info, lack of communication, and slow handling of payments made this a very poor experience.
⭐ Rating: 1/5 – Misleading stock info, unreachable support, and delayed funds return 3 days

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Fraud
3 April 2026 I went to gmpartsgiant.com website. You have to enter the vehicle prior to starting a purchase. I ordered a thermostat asm eng cool part 12642691 via sales order VG83642696. Part arrived 6 April 2026..April 24, I contacted to return the item because it was not the correct part for my vehicle. I was contacted stating it was an electrical part and not returnable. I informed them I had put the VIN in and this was the recommended part....they email back stating I received a superseding part 24588515 and the parts are interchangeable and should work. The website did not reflect the updated information and the final answer was still no I was not authorized a return....the part clearly was not interchangeable it was totally different..I had to go to the local Chevrolet dealer and get the correct part.

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