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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 221 (Data Communication System) >> Diagnostic Information and Procedures >> DTC U2099 >> Diagnostic Fault Information

Diagnostic Fault Information

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Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
High Speed GMLAN Serial Data Wake Up U2099, U0100-U0299 * U0100-U0299 U0100-U0299 ** -
* Vehicle will not start.
** History only. If cleared the DTC will return after several ignition cycles.