Sierra Classic 1500 4WD V8-6.0L (2007)
Antenna Mast: Technical Service Bulletins
Audio System - Difficult To Install Fixed Radio Antenna
INFORMATION
Bulletin No.: 07-08-44-001F
Date: June 15, 2010
Subject: Information on Difficult to Install Fixed Radio Antenna Mast
Models:
2006-2011 Cadillac Escalade EXT
2005-2010 Chevrolet Cobalt
2006-2009 Chevrolet TrailBlazer Models
2006-2011 Chevrolet Avalanche, Colorado, Silverado (Classic and New Style)
2006-2009 GMC Envoy
2006-2011 GMC Canyon, Sierra (Classic and New Style)
2006-2010 Pontiac G5
2006-2009 Saab 9-7X
Supercede:
This bulletin is being revised to add model years, a graphic with accompanying text and additional text in the Parts Information Description. Please
discard Corporate Bulletin Number 07-08-44-001E (Section 08 - Body and Accessories).
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A design change was made to the antenna base and antenna mast starting in October 2005. The radio antenna base size increased from 6 mm (0.23
in) to 7 mm (0.27 in) for improved stability and radio reception.
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There are two different design antenna masts available. The antenna masts can be distinguished by the outer bottom of the antenna mast. The first
design antenna mast (1) will have a six-sided hex design and a 6 mm (0.23 in) inside diameter thread. The second design antenna mast (2) will
have two flats on the outer mast and a 7 mm (0.27 in) inside diameter thread.
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The second design antenna mast will have more resistance when installing due to the interference fit of the threads in the mast as identified by the
arrows in the graphic.
Note
Before proceeding, verify that the mast and base stud are properly aligned.
