Build a Better Duramax Truck

Your Trusted Experts Since 2004

Hundreds of 5-Star Ratings Helpful Service & Easy Returns Affirm Logo - Easy Finance & Pay Over Time

Merchant Automotive: The largest Duramax parts supplier, manufacturer, and service center in the world

Welcome to Merchant Automotive. Founded in 2004, we pride ourselves on being the largest Duramax parts supplies in the world. Our team of trained Duramax and Allison transmission experts can help you to find whatever you need for your Duramax diesel truck.