PI0688D
Service Bulletin Details
Public Details for: PI0688D
This preliminary informational bulletin provides a revision for pi0688c to add the 2013 model year and update the parts information.
- 2012 - 2011 - 2007 - 2006 - 2005 - 2004 - 2003 -
Models from 2011
| 2011 CADILLAC ESCALADE |
| 2011 CADILLAC ESCALADE ESV |
| 2011 CHEVROLET SUBURBAN |
| 2011 GMC SIERRA 2500 |
| 2011 GMC SIERRA DENALI |
Models from 2007
| 2007 CHEVROLET AVALANCHE |
| 2007 CHEVROLET SILVERADO 1500 |
| 2007 CHEVROLET SILVERADO 2500 |
| 2007 CHEVROLET SUBURBAN |
| 2007 GMC SIERRA DENALI |
| 2007 GMC YUKON |
Models from 2006
| 2006 GMC YUKON |
Models from 2005
| 2005 CADILLAC ESCALADE |
| 2005 CADILLAC ESCALADE EXT 1500 |
| 2005 CHEVROLET AVALANCHE 2500 |
| 2005 CHEVROLET SILVERADO 1500 HD |
| 2005 CHEVROLET SUBURBAN |
| 2005 GMC SIERRA 1500 HD |
| 2005 GMC YUKON DENALI XL |
Models from 2004
| 2004 CADILLAC ESCALADE |
| 2004 CADILLAC ESCALADE ESV |
| 2004 CADILLAC ESCALADE EXT 1500 |
| 2004 CHEVROLET TAHOE |
| 2004 GMC SIERRA 2500 HD |
| 2004 GMC YUKON DENALI |
| 2004 GMC YUKON DENALI XL |
| 2004 GMC YUKON XL |
Bulletin No.: PI0688D Date: Nov-2012 Subject: Poor Voice Quality During Bluetooth Call or OnStar® Personal Call Models: 2012-2013 Cadillac Escalade Models 2012-2013 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2012-2013 GMC Sierra, Sierra Denali, Yukon Models This PI is being revised to add the 2013 model year and update the Parts Information. Please discard PI0688C. Condition/Concern Some customers may comment on poor voice quality heard by the person they are talking to when using hands-free calling (HFC). The voice of the person in the vehicle may sound "tinny", "distorted", or "computerized/digitized.” Received audio heard in the vehicle is not affected. This condition is the result of low vehicle voice input (quiet talkers) and high ambient noise (road, wind, engine, etc.). Recommendation/Instructions Replace the mobile telephone microphone. Refer to SI for replacement procedures. DO NOT REPLACE the vehicle communication interface module (VCIM) and do not update the software calibration. This microphone change will improve voice quality as heard by the receiver. Note: Advise the customer to turn “Echo Control” OFF on personal cell phones that are paired to the vehicle. Doing this improves the quality of communications. This option is not available on all personal cell phones; however, it is a choice on Blackberry mobile phones. Example: On the Blackberry Bold 9650, the user would follow these steps to adjust the setting - Choose the wrench icon (“Options”), Networks & Connections, Bluetooth Connections, Select a paired device (e.g. ‘Your vehicle’), Choose ‘Device Properties’, Scroll down to "Echo Control" & Change it to “OFF” via the dropdown menu. Parts Information Model Year Part Number Description 2012 MY Trucks 15241529 MICROPHONE, MOBILE TEL 2013 MY Trucks 20951265 MICROPHONE, MOBILE TEL Warranty Information For vehicles repaired under warranty, use: Labor Operation Description Labor Time R5114 Mobile Telephone Microphone Replacement Use Published Labor Operation Time 1 GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION 2