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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Engine Controls And Fuel - 6.0L - Introduction (2 Of 2)) >> Description and Operation >> Evaporative Emission Control System Description >> Check Gas Cap Message

Check Gas Cap Message

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

The control module sends a class 2 message to the driver information center (DIC) illuminating the Check Gas Cap message when a malfunction in the evaporative emission (EVAP) system and a large leak test fails.