I have a 2006 Chevy Tahoe, 5.3 lt.
I had a long road trip very recently. While driving the vehicle started making this rotating ticking noise, like a card in a bicycle spoke, and is now more like a window is cracked open with air rushing in.
I turned the AC and fan unit completely off, but the rushing wind noise still sounded. The faster I went the faster the rushing sound. It was coming from the front dash area.
The fan and AC work, keep cool consistently, and blows normally.
Does anybody have an idea of what I should be looking for and where?