Mechanics

CHEVY BLOWER MOTOR

2005 Chevrolet Truck

Electrical problem
2005 Chevy Truck V8 Four Wheel Drive Automatic 55000 miles

My 2005 chevy pickup has the auto climate controls. Some times the blower dont work some times it does, sometimes when I shut the truck off the blower still runs, any help.

thanks Aug
Avatar
Aug223
April 2, 2010.



There is a bulletin on this, the first one has been superseded, as shown. The reissue is attached as well. I would disregard the 'cold temps' as this fits the criteria for your failure.

#04-01-39-009C: HVAC Blower Motor Inoperative or Stays Running (Replace Blower Motor Control Module) - (Feb 28, 2007)

Subject: HVAC Blower Motor Inoperative or Stays Running (Replace Blower Motor Control Module)

Models: 2004-2005 Buick Rainier

2003-2005 Cadillac Escalade, Escalade ESV, Escalade EXT

2003-2005 Chevrolet Avalanche, Silverado, Suburban, Tahoe, TrailBlazer, TrailBlazer EXT

2003-2005 GMC Envoy, Envoy XL, Sierra, Sierra Denali, Yukon, Yukon Denali, Yukon XL

2004-2005 GMC Envoy XUV

2003-2004 Oldsmobile Bravada

2003-2005 HUMMER H2

with Automatic Temperature Control HVAC Systems Only (RPO CJ2)

This bulletin is being cancelled due to the information contained in it being superseded by information published in Corporate Bulletin 06-01-39-002A. Please discard Corporate Bulletin Number 04-01-39-009B (Section 01 -- HVAC).

#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

89018964
Module, HTR & BLO & A/C CONT (Front system only vehicles - Except H2)
1

This unit is located down near the blower motor.

Factoryjack
Apr 3, 2010.