Conditions for Running

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The Barometric (BARO) pressure is more than 74 kPa.
The engine coolant is at operating temperature, 160-248°F (71-120°C).
The Intake Air Temperature (IAT) is between 5-167°F (-15 to 75°C).
The engine is in Closed Loop fuel control.
The engine has run for 6-8 minutes off idle in order to initiate test.
The battery voltage is between 11-18 volts.