Noise When Ac Or Heat Is On?

[freebird917]

I had a 95 2dr yukon and now a 98 z71. Both of which make a light clicking noise when the heat or air is turned on. It sounds like there is a leaf in the dash? but on both vehicles? is this common and how can you fix it.

[alz]

It's possible something could have fallen into the ducts. Do you keep things on the dash over the defrost vents? Could also mean you have a blower motor going out. The bearings go bad and will make noises.

[gregrocks89]

check you blower motor, be on the passenger side on the floor. it pulls right off.