GMC TSB #PIT4916K
2012 GMC Terrain
Affected Component: VISIBILITY:GLASS, SIDE/REAR
- Summary
- This Preliminary Information communication provides information to the technician about vehicles that have may a helicopter type noise when a rear window is lowered. This is a normal characteristic of this vehicle, but the concern can be minimized by lowering a front door glass approximately 1 to 2 inches.