TSB Document:

• Sorry, the NHTSA has not posted this TSB document yet.

You can still get the detailed info from GMC for this TSB. Call your local GMC dealer's service department & ask for a copy of TSB# 612.

Affected Component: EQUIPMENT:MECHANICAL:CARRIER/RACK

Summary

WIND NOISE GENERATED BY THE PRESENCE OF ROOF RACK CROSS RAILS. THE DISTURBANCE BECOMES MORE NOTICEABLE IF THE CROSS RAILS ARE PLACED IN POSITIONS OVER THE DRIVER AND PASSENGER SEATING AREAS. GM TECH LINK. *TT

Click a tab for more information.