PIT4916C

File in Section:
Service Bulletin
Bulletin No.:
Date:
PIT4916C
April, 2013
PRELIMINARY INFORMATION
Subject:
Wind Buffeting Noise With a Rear Window Down
Models:
2010-2013 Chevrolet Equinox
2010-2013 GMC Terrain
This PI was superseded to update model years. Please discard PIT4916B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may comment of a helicopter type noise when a rear window is lowered. This is known as buffeting
and it is a low frequency, high volume wind noise that may occur in a moving vehicle with a rear window open.
Recommendation/Instructions
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. Installation of accessory weather deflectors along the front door glass may also be
effective in alleviating the buffeting noise.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is
resolved without completing every step, the remaining steps do not need to be performed.