Disclaimer 2019 GMC Truck Acadia AWD V6-3.6L Technical Service Bulletin # 08-08-64-011A Date: 100226

Mirrors - Heated Mirrors, Defrosting Time
INFORMATION
Bulletin No.: 08-08-64-011A
Date: February 25, 2010
Subject: Information on Heated Electrochromatic Outside Rearview Mirror Performance
Models:
2010 and Prior GM Passenger Cars and Light Duty Trucks (including Saturn)
2009 and Prior HUMMER H2, H3
2009 and Prior Saab 9-7X
Supercede:
This bulletin is being revised to update the model years. Please discard Corporate Bulletin Number 08-08-64-011 (Section 08 - Body and
Accessories).
Defrosting Time/Performance Concern
The electrochromatic (auto-dimming) outside rearview mirror used on the driver's side of many GM vehicles is slower to defrost than the passenger
side outside rearview mirror.
This is a normal condition. The glass on the driver's side electrochromatic mirror is twice as thick as the traditional glass on the passenger side
mirror. The heating elements for the mirrors on both sides draw the same wattage, therefore the driver's side mirror will take approximately twice as
long to defrost as the passenger mirror (approximately four minutes versus two minutes). Should a customer indicate that the driver's side heated
mirror is not functioning correctly, verify it's function based upon this information prior to replacing the mirror.
2019 GMC Truck Acadia AWD V6-3.6L Page 242