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How to replace the blower motor in a 2005 Buick lacrosse

(2005 Buick LaCrosse)
in Memphis, TN on December 28, 2009
my blower only kind of works when i get on the highway. It never works on the street. had a smiliar problem in the summer with the A/C. it would only work after i hit a speed bump really hard.
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Popular Answer
on December 28, 2009
There is a technical service bulletin (TSB) that addresses a similar problem, here is some info from the bulletin, I suggest taking this to the Dealer or a good repair shop that will look into this bulletin.
TSB #05-01-39-001A: Blower Motor Inoperative or Intermittent, Blower Speed May Drop or Blower Continues to Run After Key Off (Install a Capacitor at Blower Motor Control Module Connector) - (Apr 6, 2005)
Some customers may comment on an inoperative or intermittent Heating, Ventilation and Air Conditioning (HVAC) blower motor. Others may comment that the blower motor speed may momentarily drop or that the blower motor continues to run after the key is turned off.
This condition may be caused by a voltage spike from the wiper motor. The voltage spike may cause a logic lock up in the blower motor control module that may be either momentary or permanent.
Technicians are to install a capacitor, P/N 25073556, at the blower motor control module connector.
Models: 2005 Buick Allure (Canada Only), LaCrosse 2004-2005 Pontiac Grand Prix
DO THIS: Install a Capacitor at the Blower Motor Control Module Connector
DO NOT DO THIS: replace the Blower Motor Control Module, Blower Motor or the HVAC Control Head
on January 23, 2011
Thanks for the info. I pulled the wiper fuse to stop the wiper arms in a position to change the blades. Next time I drove the car, the heater fan would not run. After reading your info, I disconnected and reconnected the battery, and whala, the fan works fine again.

Guess I need to get that cap.
on April 17, 2011
My 2005 Buick LaSabre blower motor slowed down and would sometimes make weird noise, this continued for a couple months. suddenly it stops working and now I have no heat. I suspect that the blower has gone bad, if so how do I replace it.
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