Question on ac fan in 98 gmc k1500

Question

the fan for my ac/heat is running slow. there are 5 speeds and it only changes speeds for the first 3 and the last 2 (highest) it stays the same speed as 3. is the moter worn out or is it a problem with the switch. if it is the moter any one know if they are hard to change

Answer 1

like the p*ss on ford pic, my dad used to have it on his truck

its probbably the switch

Answer 2

There is a blower motor resistor block on the top of the heater case.You should remove this resistor and check for damaged coils.This is where your going to fine your blower speed problem.The coils on this block control the currant for the different speeds and break over time .You can remove this block by removing the two small screws.These can be bought at most auto parts stores for less than $30 dollars. Best of luck.