This is a fairly narrow market segment and ...This is a fairly narrow market segment and it's the major players:
Class 3 Medium duty 10,001–14,000 pounds (4,536–6,350 kg) Chevrolet Silverado/GMC Sierra 3500, Ford F-350, Ford F-450 (pickup only), Ram 3500, Isuzu NPR[15]
Class 4 Medium duty 14,001–16,000 pounds (6,351–7,257 kg) Chevrolet Silverado 4500HD/International CV, Ford F-450 (chassis cab only), Ram 4500[12], Isuzu NPR-HD,[15]
Class 5 Medium duty 16,001–19,500 pounds (7,258–8,845 kg) Chevrolet Silverado 5500HD/International CV, Ford F-550, Ram 5500, Isuzu NRR,[15] Freightliner Business Class M2 106, Kenworth T170, Peterbilt 325
Class 6 Medium duty 19,501–26,000 pounds (8,846–11,793 kg) Chevrolet Silverado 6500HD/International CV, Ford F-650, Freightliner Business Class M2 106, International MV[16], Kenworth T270, Peterbilt 330, Mack MD