Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Fault Information
2019 Buick Cascada BaseSECTION Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U0100 - U02FF | U0100 - U02FF | - | - |
| Ignition | U0100 - U02FF, U1814, U2099 | U0100 - U02FF | - | - |
| Object High Speed GMLAN Serial Data (+) | U0075 | U0100 - U02FF | U0075 | - |
| Object High Speed GMLAN Serial Data (-) | U0075 | U0100 - U02FF | U0075 | - |
| Chassis High Speed GMLAN Serial Data (+) | U0074, U0077 | U0100 - U02FF | U0074, U0077 | - |
| Chassis High Speed GMLAN Serial Data (-) | U0074, U0077 | U0100 - U02FF | U0074, U0077 | - |
| Mid Speed GMLAN Serial Data (+) | U0074 | U0100 - U02FF | U0074 | - |
| Mid Speed GMLAN Serial Data (-) | U0074 | U0100 - U02FF | U0074 | - |
| High Speed GMLAN Serial Data (+) | U0073, 2 | U0100 - U02FF | U0073, 2 | - |
| High Speed GMLAN Serial Data (-) | U0073, 2 | U0100 - U02FF | U0073, 2 | - |
| Low Speed GMLAN Serial Data | U0078, 1 | U0100 - U02FF | U0078, 1 | - |
| Ground | - | U0100 - U02FF | - | - |
| 1. Scan tool does not communicate with most low speed GMLAN device 2. Scan tool does not communicate with most high speed GMLAN device |
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RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.