2000 Chevrolet Tahoe Q&A

2000 Chevrolet Tahoe Question: My heater up front blows cold. the heat in back works great.what is wrong

Ive replaced the actuator under the dash and both in cab air filters what else could be wrong -
Answer 1
I did not do anything as yet,cant find temperature door actuator or location cabin filters. this is 2000 chevy tahoe 5.3. -