In 1988, I bought a new one ton extended cab chevy with the 350 cu. in. engine and 3.73 rear end. And then I bought a fifth-wheel travel trailer; 7,300# on the axles and 2,500# on the pin. I wasn't unhappy with the performance, but the temperature gauge ran too high to suit me. It never ran low on coolant or showed any other indications of overheating except that temperature gauge running higher than I liked. But in 1989, I had a brother selling RVs and Chevrolets and Buicks, and he got me a deal too good to turn down for a new 1989 one ton extended cab dually with the 454 engine and 4.10 rear end. Naturally, I did like that better. Of course back then they were 3-speed automatics and I had a Gear Vendors overdrive added to the dually; sure was a pleasure to drive.