Silverado Bump and Grind

I have a 2002 Silverado 2wheel 1500 that has developed an unusual noise that seems to come from behind the dash (near the glove box). There is a roller type sound (creaky likes it's stretching something) that usually ends with a clunk. I'm pretty sure it does it whether the AC is on or not and it doesn't seem to affect the AC at all. I just had the thing in for maintenance so, I hesitate to take it back. I did have the blower control replaced about 10,000 miles ago (wouldn't come on until Speed 3) and I did have the cabin filter replaced recently.

Sounds like a blend or mode door actuator motor that cant find a "park" position.

I have a 2002 Silverado 2wheel 1500 that has developed an unusual noise that seems to come from behind the dash (near the glove box). There is a roller type sound (creaky likes it's stretching something) that usually ends with a clunk. I'm pretty sure it does it whether the AC is on or not and it doesn't seem to affect the AC at all. I just had the thing in for maintenance so, I hesitate to take it back. I did have the blower control replaced about 10,000 miles ago (wouldn't come on until Speed 3) and I did have the cabin filter replaced recently.


remove the blower motor to see if you have some debris in there. removal of the under glove box plastic cover then disconnect the wiring and unscrew the motor mounting .

replace / clean the air filters next to the blower at this time.