Blower Motor
 

99 OBS Tahoe.

The blower motor does not want to work from time to time. If I knock on the back of the motor a couple of times it kicks on. It seems to be happening more frequently. Is this the sign of needing to replace the blower motor?

Re: Blower Motor
 

The motor could very well be on it's way out. But your issue could also be a bad contact. If you look towards the top of the blower motor, you'll see a 1 wire connection. Take the plug off and clean the male terminal on the motor and the female plug. That might fix your problem!