Diagnostic Tip – Diesel Exhaust Fluid System Contamination – 2010-2023 Chevrolet & GMC
NHTSA ID Number: 10222781 Manufacturer Communication Number: 19-NA-237 Summary This informational bulletin explains how to identify possible DEF contamination. Condition Some customers may comment on one or more of the following conditions: Exhaust fluid quality poor message on the Driver Information Center (DIC). Diesel exhaust fluid warning lamp on. Other exhaust fluid quality related concerns. … Read more