Quote:
Originally Posted by 68Gold/white
My interpretation of the words, "light duty", "medium duty", and "heavy duty" are, and always have been...:
Light duty always refers to 1/2, 3/4 and 1 ton pickup trucks. (C-10, C-20, C-30)
Medium duty refers to C-40 and above. I do not know where, what's considered "heavy" duty begins, maybe above C-70???
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I generally agree. IMO, medium to heavy duty starts about where the CDL kicks in 26,000Lb GVWR and above. Trucks with air brakes and or dual drive ( 10 wheelers) or tractor trailers. In Chevy trucks C 70 and above, and or trucks with 366-427's are in the heavy duty class.