Diagnostic Fault Information
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.
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
DTC U2099
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| High Speed GMLAN Serial Data Wake Up | U2099, U0100-U02991 | U0100-U0299 | U0100-U02992 | - |
| 1
Vehicle will not start. 2 May be history only. If cleared the DTC should return after several ignition cycles. |
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