
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 Light2-6 Clutch Piston Installation (6T40/45/50) Automatic Transmission Unit
2-6 Clutch Piston InstallationCalloutComponent Name12–6 Clutch Piston AssemblyNote:Position the 2–6 piston air bleed and large slot toward the top of the case.DT-47796 seal protector prevents the piston seal lip from damage during installation. Apply a thin coat ofATF to the I.D. of the DT-47796 ...