2005 Pontiac Grand Prix.
Engine size = 3.8
GM Computer codes = No
Work done to repair this problem = New blower motor.
How found us = Friend
GM tech = JK
question = The blower motor stopped working in my '05 Pontiac Grand
Prix.  Using my volt meter, I checked for voltage at the blower.  With the
fan set to the highest setting, I saw 12 volts so I thought the blower motor
was bad & replaced it.  The new motor ran for 5 seconds then stopped.  
Still getting 12 V at highest setting and 6V at lowest fan setting.  I've read
that if the resistor goes bad, the fan will operate only at the highest
speed, however mine doesn't operate at all.  Any suggestions?
Your system works a little different. No seperate circuit for high only.
The blower resistor / control module controls all speeds, and the ground
for the blower- circuit 2150 BLK wire.
Need to put the volt meter, or better yet a test light, in the blower
connector. Test light will light if you have power in and ground. Sounds
like you probably wont.
Sounds like the resistor / module is bad. Also check the plug on it for
burned terminals.
The module also has a ground behind the radio on the cross beam.