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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Blower fan quit working. When trying to set auto temp

Customer Question

Blower fan quit working. When trying to set auto temp controls the numbers jump all over the place.
JA: What is the model/year of your Chevy?
Customer: 2004 trailblazer
JA: Are you fixing your Trailblazer yourself? What have you tried so far?
Customer: yes I am Nothing so far
JA: Anything else you want the mechanic to know before I connect you?
Customer: it used to work intermitantly then quit all together
Submitted: 9 months ago.
Category: Chevy
Expert:  Super Mechanic replied 9 months ago.

Hello and welcome. My name is ***** ***** you for visiting the site, I am reviewing your question and will reply shortly, thanks.

Expert:  Super Mechanic replied 9 months ago.

It sounds like a ground problem. There was a factory service bulletin on one of the ground connections for intermittent blower/controls.