2006 impala
Are you saying the blower motor stops working? That might be a sign of bad brushes in the blower motor? If that is the case, replace the blower motor. You could check the wiring connector for blower motor.
In the past, I have taken faulty blower motor apart, and those little brushes were wore down to the nub. A bump can cause the brushes to make better contact, or lose contact in your case.
Could be other issues, the blower motor needs voltage and ground. Just my opinion.
SOURCE: 2500, Jumps all over the road after you hit a few bumpes at 70+mp
Check the truck's shock absorbers!
They need replacing
SOURCE: heater fan dosent work will come back on after
probably the switch, but please see my tip at http://www.fixya.com/cars/r6234839-doesn_t_heater_or_air_conditioner_blow . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.
SOURCE: heater motor wants to stop when i hit bump 2004 impala
bad wiring connection or motor bearings on way out.
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