Shipping & Returns

Dmaxstore is dedicated to getting our members the absolute lowest prices on the highest quality products available for the Duramax diesel. Every effort will be made to include shipping with your purchase.  However if you are purchasing smaller ticket items such as fuel or transmission filters where shipping is additional, you may consider adding multiple items to your cart for volume shipping discounts.

We will gladly accept returns within 30 days of purchase with a 10% restock charge to be subtracted from credit along with any shipping costs. You must call in advance for return authorization @

(877) 4MY-DMAX

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