PI0695A
Service Bulletin Details
Public Details for: PI0695A
Diagnosis and repair hvac blower function.
- 2013 - 2012 - 2011 - 2010 - 2009 - 2008 - 2007 -
Models from 2013
2013 CADILLAC ESCALADE |
2013 CHEVROLET SILVERADO 1500 |
2013 CHEVROLET SUBURBAN |
2013 CHEVROLET TAHOE |
2013 GMC SIERRA 1500 |
2013 GMC SIERRA 2500 |
2013 GMC SIERRA 3500 |
2013 GMC YUKON |
Models from 2012
Models from 2011
Models from 2010
Models from 2009
Models from 2008
Models from 2007
2007 CHEVROLET SILVERADO 1500 |
2007 CHEVROLET SILVERADO 2500 |
2007 CHEVROLET SILVERADO 3500 |
2007 GMC SIERRA 1500 |
2007 GMC SIERRA 2500 |
2007 GMC SIERRA 3500 |
File in Section: Service Bulletin Bulletin No.: Date: PI0695A November, 2012 PRELIMINARY INFORMATION Subject: Diagnosis and Repair HVAC Blower Function Models: 2008-2013 Cadillac Escalade Models 2007-2013 Chevrolet Silverado 2008-2013 Chevrolet Suburban, Tahoe 2007-2013 GMC Sierra 2008-2013 GMC Yukon Models All Built Prior to November 1, 2012 This PI is being revised to add the 2013 model year and build date information. Please discard PI0695. Condition/Concern Some customers may comment that the HVAC blower motor is not functioning. They may also comment that there is no air flow from the HVAC vents. This may be an intermittent condition. One possible cause of this condition may be the contacts in the HVAC junction block(s) located at the right side of the instrument panel. Recommendation/Instructions Important: Do Not Replace the HVAC blower motor assembly to correct this condition. Use the following steps to diagnose the condition and, if necessary, replace the affected connector terminal in the instrument panel junction block. 2062300 1. Remove the cover on the right side of the instrument panel, exposing the junction blocks. 1991088 2. Identify Junction Block X4 and X6. 3. With the ignition key in the on position, turn on the HVAC blower and apply light hand pressure to the connectors. Determine if this movement affects the blower operation (intermittent operation). 4. Determine which junction block is affecting the blower operation. Junction Block X4 Correction Use the following diagnostic and repair steps if the fault is determined to be caused by the X4 junction block. 1. Make sure there are no backed out or loose terminals using the appropriate Terminal Test Probe. 1667399 2. 3. 4. 5. 6. Locate Pin A6, Circuit 754. Perform a pin drag test using test probe J-35616-2A (GY). If the terminal fails the pin drag test, replace the terminal for Pin A6. Refer to Junction Block - Right I/P X4 in SI. Cut off the terminal between the core and the insulation crimp to minimize any wire loss. To minimize wire loss, remove only the insulation required. 7. 8. 9. 10. Position the stripped wire in the terminal. Hand crimp the core wings first. Hand crimp the insulation wings around the cable. Solder the hand crimp terminal. Junction Block X6 Correction Use the following diagnostic and repair steps if the fault is determined to be caused by the X6 junction block. 1. Make sure there are no backed out or loose terminals using the appropriate Terminal Test Probe. 493694 2. Locate Pin A, Circuit 542. 3. Perform a pin drag test using test probe J-35616-42 (RD). 4. If the terminal fails the pin drag test, replace the terminal for Pin A. Refer to Junction Block - Right I/P X6 in SI. 5. Cut off the terminal between the core and the insulation crimp to minimize any wire loss. 6. To minimize wire loss, remove only the insulation required. 7. Position the stripped wire in the terminal. 8. Hand crimp the core wings first. 9. Hand crimp the insulation wings around the cable. 10. Solder the hand crimp terminal. Reconnect the junction block. Verify the condition has been corrected. Reinstall the instrument panel right cover. Parts Information Note: Following a warranty repair, all parts are to be turned into the parts department by the technician for tagging, retention and/or return. Part Number Description 12191812/19 Junction Block X4–Terminal/Tray 12084590/3 Junction Block X6–Terminal/Tray Warranty Information For vehicles repaired under warranty, and found to have had the above condition, use: Labor Operation Description Labor Time N9682* Diagnose/Repair – HVAC Blower Inoperative 0.3 hr Add Replace First Junction Block Terminal 0.2 hr Add Each Additional Terminal Replacement 0.1 hr *This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide. Customer Complaint Code Code Description (Category: 06 Heating/Ventilation/Air Conditioning) 0723 Heating/Ventilation/Air Conditioning - Heater Performance Code Description (Category: 06 Heating/Ventilation/Air Conditioning) 7083 Wiring/Electrical/Sensors - Poor Contact Cause Code