BUICK, CHEVROLET
17NA190
Manufacturer communications
- Publication date
- 2018-03-21
- Received by NHTSA
- 2018-05-21
- NHTSA record numbers
- 10137405
Manufacturer summary
Original wording in English
This informational bulletin provides information for technicians during diagnosis for DTC U0420.
Reported code forms
Check vehicle applicability
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.