Symptoms Verification

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Verify that all of the following conditions are true:

The engine control module (ECM) and the malfunction indicator lamp (MIL) are operating correctly.
There are no diagnostic trouble codes (DTCs) stored.
The scan tool data is within the normal operating range.
Bulletins are not available for the current symptom.
The ECM grounds are clean, tight, and in the correct locations.
The vehicle tires are correctly inflated and meet original equipment specifications.
The air filter element is not restricted. Refer to Air Cleaner Element Replacement .