Air Quality Sensor
For vehicles with an air quality sensor, the climate control system adjusts to limit some exhaust fumes from being pulled inside your vehicle.
Press the AUTO button on the climate control to activate the air quality sensor. The recirculation indicator light comes on when poor quality air is detected. The air quality sensor will not maintain recirculation for an extended period to prevent the air inside the vehicle from becoming too dry or stuffy.
Under certain conditions, the air
quality sensor will not activate,
such as during cold weather or
with extreme odors. Press 
to
activate recirculation.
The air quality sensor system does not protect against carbon monoxide (CO), which you cannot see or smell. See Engine Exhaust.
See also:
Automatic Transmission Shift Lock Control Function Check
WARNING
When you are doing this inspection, the vehicle could move suddenly. If the
vehicle moves, you or others could be injured.
1. Before starting this check, be sure there is enough room aro ...
Services Specific to Canadian-Purchased Vehicles
Fuel delivery: Reimbursement is approximately $5 Canadian. Diesel fuel
delivery may be restricted. Propane and other fuels are not provided through
this service.
Lock-Out Service: Vehicle r ...
Safety and security
The '07 Escalade is designed to be among the industry's safest and most
secure vehicles, with numerous safety systems and crash-avoidance technologies.
New occupant protection features include hea ...