
For the base level cluster, this light comes on when the fuel tank is low on fuel. The light turns off when fuel is added. If it does not, have the vehicle serviced.

For the uplevel cluster, this light is near the fuel gauge and comes on briefly when the ignition is turned on as a check to show it is working.
It also comes on when the fuel tank is low on fuel. The light turns off when fuel is added. If it does not, have the vehicle serviced.
Engine Oil Pressure Light
Diesel Exhaust Fluid (DEF) Warning LightLow and Reverse and 1-2-3-4 Clutch Housing, and 1-2-3-4 Clutch Plate Installation (6T40/45/50) Automatic Transmission Unit Automatic Clutches
Low and Reverse and 1-2-3-4 Clutch Housing, and 1-2-3-4 Clutch Plate InstallationCalloutComponent Name1Low and Reverse and 1–2–3–4 Clutch HousingNote:The longer legs face the bottom of the case and the oil passages face the valve bodyend of the case.2Output Sun Gear Assembly31–2–3–4 Clut ...