47-55.1 Chevrolet COEs were available in only three wheelbases. 5100 series, which were 110in., 5400 series, which were 134in. wheelbase, and the 5700 series COEs, which were 158in., wheelbase. The majority of them were 5700 series. The least produced of all of the series were the 5100 series COEs. I've owned thirty of them the last 35 years, and 22 of them were 5700 series trucks. Three were 5400 series, and only two were 5100 series. The other three GM COEs, I've owned were GMC COEs.
