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Dan
Dan, Auto Technician
Category: Chevy
Satisfied Customers: 3490
Experience:  GM Mark of Excellence/ Service Guild Participant with 13 years experience, ASE Master Certified
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ac and heater wont blow air. i think its a fuse or some kind

Customer Question

ac and heater won't blow air. i think its a fuse or some kind of blower motor or switch
Submitted: 6 years ago.
Category: Chevy
Expert:  Dan replied 6 years ago.
HiCustomer Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:
-What year is your Chevy?
-What model is your Chevy?
-How many miles are on your Chevy?
-What type of engine is in your Chevy?
-What have you already tried?

Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.
Customer: replied 6 years ago.
2005 trailblazer
70,000 miles
6 cylinder
but did have new ac replaced last year at a chevy certified dealer
Customer: replied 6 years ago.
are you there
Expert:  Dan replied 6 years ago.
Yes, sorry. Eating dinner.
Expert:  Dan replied 6 years ago.
#06-01-39-002C: Blower Motor Inoperative or May Not Shut Off in Extremely Low Ambient Temperature Conditions (Replace Blower Motor Control Module) - (Jan 18, 2008)

Subject:Blower Motor Inoperative or May Not Shut Off in Extremely Low Ambient Temperature Conditions (Replace Blower Motor Control Module)

Models:2004-2007 Buick Rainier
2003-2006 Cadillac Escalade Models
2003-2006 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003-2007 Chevrolet TrailBlazer Models
2007 Chevrolet Silverado (Classic)
2003-2006 GMC Sierra Models, Yukon Models
2003-2007 GMC Envoy Models
2007 GMC Sierra (Classic)
2003-2004 Oldsmobile Bravada
2003-2006 HUMMER H2 Models
with Automatic Temperature Control HVAC System (RPO CJ2)

 



This bulletin is being revised to update the model years that are affected and add the Oldsmobile Bravada. Please discard Corporate Bulletin Number 06-01-39-002B (Section 01 -- HVAC).


Condition

Some customers may comment that the blower motor is inoperative or continues to run after the vehicle has been shut off.

Cause

These conditions may be caused by a blower motor control module failure. This failure may occur when the vehicle is operated in ambient temperature conditions of -23°C (-10°F) or below.

Correction

Important: Replace the blower motor control module if the vehicle experienced a blower motor control module failure in extremely cold ambient temperature conditions.

Technicians are to replace the blower motor control module, also called the Linear Power Module (LPM), with the P/N listed below. Refer to either the Blower Motor Control Processor Replacement or Blower Motor Processor Replacement-Auxiliary procedures in SI. After replacement of the blower motor control module, the customer may notice a slightly higher than expected blower motor speed at any of the blower speed settings.

Parts Information

Part Number

Description

Qty

89018849

Module Assembly, Auxiliary Blower Motor Control (Rear System on Escalade ESV, Suburban, Yukon XL)

1

89018964

Module, HTR & BLO & A/C CONT (Front system only vehicles - Except H2)

1

89023355

Module Assembly, Blower Motor Control (H2 Models)

1

89024926

Module Assembly, Auxiliary Heater & A/C Control (Rear System on Escalade, Yukon, Tahoe)

1

Dan, Auto Technician
Category: Chevy
Satisfied Customers: 3490
Experience: GM Mark of Excellence/ Service Guild Participant with 13 years experience, ASE Master Certified
Dan and 2 other Chevy Specialists are ready to help you
Customer: replied 6 years ago.
where is this blower motor control module located and i could not access the full image clip

thanks
Customer: replied 6 years ago.
<p>did u get my question</p>
Customer: replied 4 years ago.
never did fix problem
Customer: replied 4 years ago.
Relist: Answer came too late.

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Dan
Dan
Chevy Mechanic
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GM Mark of Excellence/ Service Guild Participant with 13 years experience, ASE Master Certified