Conditions for Running the Test

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

The following conditions must be met in order to enable the Service Bay Test:

The battery voltage is between 11-18 volts.
The engine coolant temperature (ECT) is less than 70°C (158°F) at start-up.
The EVAP I/M system status indicator is set to NO.
The fuel level is 15-85 percent capacity and cannot be refueled during the tests.
There are no DTCs displayed.
The vehicle must be driven for the time and distance specified on the scan tool.
The ambient air temperature is between 0-40°C (32-104°F).
The ignition must remain OFF during the engine OFF portion of the test, and the vehicle must remain at rest.