Circuit/System Testing
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the G18 High Pressure Fuel Pump.
- Verify the lobes on the camshaft do not have unusual wear or are worn.
- If the lobes have unusual wear or are worn
Replace the Camshaft.
- Go to next step: If the lobes are OK
- If the lobes have unusual wear or are worn
- Test or replace the G18 High Pressure Fuel Pump.
NOTE:
Circuit/System Verification must be performed first or misdiagnosis may result.