Diagnostic Fault Information
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U0100 - U02FF | U0100 - U02FF | - | - |
| Ignition | U0100 - U02FF | U0100 - U02FF | - | - |
| Accessory Wake up Serial Data | U1814 | U0100 - U02FF | - | - |
| Serial Data Communication Enable | U2099 | U0100 - U02FF | - | - |
| High Speed GMLAN Serial Data (+) | 2 | U0073, U0100 - U02FF | 2 | - |
| High Speed GMLAN Serial Data (-) | 2 | U0073, U0100 - U02FF | 2 | - |
| Low Speed GMLAN Serial Data | 1 | U0100 - U02FF | 1 | - |
| Ground | - | U0100 - U02FF | - | - |
| 1. Scan tool does not communicate with low speed GMLAN device 2. Scan tool does not communicate with high speed GMLAN device |
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