Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Ambient Air Temperature Display Update
| Condition | Display |
|---|---|
| Using Scan Tool Special Function | Updates temperature display instantly |
| When the HVAC module MODE, FRONT DEFROST, and REAR DEFROST buttons are pressed simultaneously. | Updates temperature display instantly |
| At start up with the engine off less than 2 hours | Displays last stored temperature unless temperature has decreased. The outside air temperature reading is always instantly updated if ambient air temperature has decreased. |
| At start up with the engine off more than 2 hours | Displays actual outside temperature |
| Vehicle speed above 32 km/h (20 mph) for a minimum of 80 seconds | Updates temperature display at a slow filtered rate |
| Vehicle speed above 72 km/h (45 mph) | Displays actual outside temperature |
| Sensor ambient temperature reading is less than the last displayed value | Displays actual outside temperature |
| When the ambient air decreases | Updates temperature display rapidly |