Not sure about the part numbers or any of that but here is their return policy. You can also find it on their site once you logon to it.
To return or exchange any items, properly pack, insure and ship by ground prepaid.
A Return Goods Authorization (RGA) number must accompany all returns. You can request an RGA number by clicking on the "Continue" button at the bottom of this page and properly processing a Return Request. Once your request has been authorized you will be e-mailed a return shipping label to be printed and attached to the original shipping carton. If you are unable to print your return label please contact us by e-mail so we can mail it to you by US Postal Service. No returns will be accepted without a RGA number.
Returns without a RGA will be refused and will be returned to sender.
If you choose to email us, please include the following in your email message:
Reason for returning
Day time phone number
General Return Guidelines
Within 30 days of receipt of your order, you may return products that:
Are in their original packaging
Have not been opened
Have original manufacturer information
Are not damaged
Do not have missing parts
Returns & Restocking Fee
A copy of your invoice and a letter of explanation as to why the product is being returned must accompany all returns. Incorrectly supplied items will be exchanged or refunded at our option. No refunds will be authorized after thirty (30) days. All items returned must be in new, unused condition for credit, exchange or refund.
All non-defective returns are subject to a 20% re-stocking fee ($20 minimum).
These returns still require an RGA number (see above) and all non-defective returns are subject to a 20% re-stocking fee ($20 minimum).
All return merchandise will be your responsibility until credit is issued from gmpartsdirect.com.
We will issue a refund for the product only when your return meets these guidelines. The cost of shipping will be credited only in those instances where the return is a result of our error.
If due to our "goof", we will refund your return ground shipping charges. Returned items must be in original boxes and must be in reasonable condition. Books, tools, special order and electrical items are not returnable for refunds. Returns received after 30 days from the return authorization date will not be accepted. All returns accepted are subject to a restocking charge of 20% or $20.00 (whichever is greater). Any merchandise held over 30 days may not be returned. You have up to 30 days to return the item back to us in the original packaging for a full refund of the item only. Please pack returns carefully (using the packaging it came with) and use a traceable method of shipment (UPS Ground is probably the most convenient). Once we receive the goods, we'll credit your account for the full purchase price minus the initial handling and shipping. Please be sure to include a copy of your packing slip or original order confirmation, and information as to which credit card was used.
DISCLAIMER OF WARRANTY
GMPartsDirect. com does not manufacture any of the products sold on this site. All products sold are warranted by the original manufacturer. Except for such original manufacturer warranties, GMPARTSDIRECT.COM DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTIBILITY AND WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE. GMPartsDirect. com will not be liable for any damages of any kind arising from the use of this site or products obtained or ordered from this site, including but not limited to direct, indirect, incidental, punitive or consequential damages.