Check air filter. Resistor could be going. Motor could be going out. My Lumina doesit but I smell electrical fire sometimes which means the motor is going.
it idle or even at steady cruise? the newer cars have PWM blower controls but charging system voltage fluctuation at idle can easily cause it to drop/rise a small amount.
I kept an eye on the voltmeter, and it was always 14.3 constant. happens both at idle and cruising.. The air filter, like cabin filter? Didnt know we had one
Yeah pull the passenger side wiper cowl and it'll be under there. theres also a TSB for the wiper cowl not sealing against the windshield and letting water inside the car
ABS hubs are junk. and alot of em out there are junk. Ive had the best with SKFs. Theyre not cheap but they're built better when I compared them to cheaper ones. Napa has a 3 year warranty on them as well