skylark
I'm Awesome
Try Wikipedia.01-02 HD is the new body and style with other changes
While all other C/K pickup models were dropped by 2000, the C3500 HD was produced until 2002 due to fleet demand. In the brochures it is referred to as Sierra Classic/Silverado Classic. There were two engine choices; The 8.1L Vortec Big Block replaced the Gen VI 7.4L Vortec Big Block and the venerable 6.5L Turbo Diesel.
In my opinion the 4L60E would be a poor choice.