Warning Level 1
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.
Warning Level 1 is triggered when the ECM first detects an abnormal value on a reductant system circuit. The Driver Information Center (DIC) displays the following messages:
For Non-Emergency vehicles and Emergency vehicles MY 2013 and older:
- Service Exhaust Fluid System
- See Owner's Manual Now
- 160 km (99 miles) until 105 km/h (65 mph) Max Speed
For Emergency vehicles MY 2014 and newer:
- Service Exhaust Fluid System
- See Owner's Manual Now
- 999 km (620 miles) until 105 km/h (65 mph) Max Speed
The messages alternate every 5 seconds in the DIC until acknowledged by the driver; however, the mileage countdown message remains in the DIC. The DEF Indicator in the instrument panel is illuminated.