How do you know what size radiator you have. I have an 04 VHO Sierra.

 

You should have a 34" radiator if you have a 6.0. You can measure it between the end tanks to get the legnth. Or if the radiator is bolted in the two outermost large holes on the top crossmember then its a 34", If the rad is bloted to the two inner bigger bolt holes then its a 26" I think.

 

Smaller one is 27"

 

27" Thats right! I was close

 

Close enough!