Ok, so anyone willing to help me out and give any of this a try, I would be forever grateful. I have a 2002 Tahoe LT, with 118K miles. First, my front heat is not working like it should. The blower blows warm air at best. All the hoses are warm to the touch. My rear heat works just fine.

Problem # 2. My check engine light keeps coming on, and is giving out the P0101 code which is for the Mass Air Flow. I replaced the sensor, replaced the intake gasket, and cleaned the throttle body. What next?

Problem # 3. There is a strange noise coming from the front drivers side area. Its similar to road noise that big tires make then your on the highway. It also increases and decreases with speed. I checked my tires, and all are ok, no nails in the tires, rocks, pebbles, etc. I know I do need to do some front end work, ie. new shocks, bearings, arms, etc, etc. Would any of this be causing the noise ?

Any help with any of these problems would be greatly appreciated, thank you.....

 

#1 sounds like a broken or worn "blend door" in the heater box
#3 sounds like a wheel bearing

These are just my unprofessional opionions though. I'm not a mechanic, just an enthusiast. Might help you with a place to start looking though.

 

Thank you. I will look into this.

 

I had an 01 that my heater was doing the same thing. It was an internally plugged heater core.

I agree with the wheel bearing for #3. If it is just as well do both sides. Once one goes the other is only a few miles behind it

 

Blend door, blend door actuator or plugged heater core