Sierra 1500 4WD V8-6.0L (2007)
Sound Proofing / Insulation: All Technical Service Bulletins
Interior - Excessive Wind Noise In Interior Of Vehicle
TECHNICAL
Bulletin No.: 10-08-58-001E
Date: March 08, 2011
Subject: Excessive Wind Noise Coming from Rear Interior of Vehicle (Perform Repair as Outlined)
Models:
2007-2011 Chevrolet Silverado Crew Cab and Extended Cab
2007-2011 GMC Sierra Crew Cab and Extended Cab
Supercede:
This bulletin is being revised to update the repair in the Customer Enthusiasm section and update the Parts Information. Please discard Corporate
Bulletin Number 10-08-58-001D (Section 08 - Body and Accessories).
Condition
Some customers may comment on hearing excessive wind noise coming from the rear interior of the vehicle.
Cause #1
This condition may be caused by a void in the body filler within the C-pillar.
Cause #2
This condition may be caused by the body rear panel acoustic insulator that is mounted behind the rear seat. There is an access flap (1) in this panel that
could cause excessive noise if the flap is not fully seated/closed into the rest of the insulator material.
Also, starting in 2010, a new insulator was installed that may allow higher wind/road or other acoustic noise that may be objectionable for some
customers. Noise penetration into the cab can be higher than a similarly equipped 2009, or earlier, model. As shown in the graphic above, note that the
service part insulator (1) is noticeably thicker than the original 2010 part (2).
Correction #1
Note
This repair is specific to 2007-2010 model years.
