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Holiday Hours: November 26: Thanksgiving day - Closed     November 27: Black Friday - Closed
December 24: Christmas Eve - Closed       December 25: Christmas Day - Closed
December 31: New Years Eve - open till 1 PM, no orders will ship       January 1: New Years Day - Closed


Duramax Truck
LB7: '01-'04 - VIN Code 1
LLY: '04.5-'05 - VIN Code 2
LBZ: '06-'07 - VIN Code 2 or D
LMM: '07.5-'10 - VIN Code 6
LML: '11+ - VIN Code 8
Used Parts
Duramax Van
LLY: '06-'07 - VIN Code 2
LMM: '08-'10 - VIN Code 6
Gas: 1500, 2500
Transfer Case
Fluids and Tools
Garage Sale
Garage Sale
Tech Info
Tech Videos



Merchant Automotive is your Duramax diesel and Allison transmission destination. We have the parts you need, and the knowledge to fix your truck. However, sometimes it is more economical to do the work yourself. That is why we created these DIY how to videos. If you do not find the information you were looking for or have any questions please contact us.

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