how do you remove,and install a heater resistor on 2004 Chevrolet Silverado 2500 HD

my heater/a.c. motor ran for a while and then would stop,and mow won`t run at all

ck the blower motor resistor next to blow motor.also ck wiring plug for burn't wires very common on gm.use delco repl parts as others are subject to many issues
Thanks,I`ll give it a try,Ken