my buddy has an 03 GC 4.0 , just had a new radiator and thermostat put in and the low coolant wanring light still comes on, it came on before the new stuff too, but thought cuz the radiator was leaking .. it doesnt run hot, checks the levels and its right where its supposed to be,, the place that did the rad got all the air out too,,, could it be just the sensor?,, any help would be great

 

i would say a bad sensor...my dad said his gmc yukon got a bad sensor and the abs braking and parking brake light is on at times and sometimes not....also gets a low coolant dummy light but everything is fine...but the sensors