How to Identify the Cummins Engines That Are Available by Vin Number


One of the biggest selling points of the Dodge Ram truck is the availability of powerful Cummins diesel engines. The latest version of the turbo diesel engine was introduced in the 2007 Dodge Ram lineup. This engine is a 6.7-liter 409-cubic-inch inline six. The high-performance diesel motor delivers 350 horsepower with 650 foot-pounds of torque. The size and type of engine can be found by interpreting the engine code in the vehicle identification number.

  • Locate the 17-character VIN number. Find it on the tag just under the windshield molding on the driver's side of the truck. It is also found on the title.

  • Decode the 10th character of the VIN to verify the model year. R is for 1994, S for 1995, T for 1996, V for 1997, W for 1998, X for 1999, Y for 2000, 1 for 2001, 2 for 2002, 3 for 2003, 4 for 2004, 5 for 2005, 6 for 2006, 7 for 2007, 8 for 2008, 9 for 2009.

  • Decode the eighth digit for 1994 to 1997 Dodge trucks. The letter C indicates a 5.9-liter, six-cylinder, Turbo Diesel, 12-valve engine.

  • Interpret the 8th digit for 1998 to 2004 trucks. The number 6 is for a 5.9-liter, six-cylinder, 24-valve turbo diesel; 7 for a 5.9-liter, six-cylinder, turbo diesel 24-valve high output (HO); A for a 6.7-liter, six-cylinder, turbo diesel; C for a 5.9-liter, six-cylinder, turbo diesel 24-valve high output; and D for a 5.9-liter, six-cylinder, turbo diesel engine.

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  • Photo Credit red truck engine image by Christopher Nolan from
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