2015 Silverado cooling fans.

[TravisK]

You

Cooling fans being commanded to 10-11% but completely stopping instead.  The fans seems to work fine when commanded 15-90%. Happens when ac FINALLY gets nice and cool and blower turned down to 10-40%.. at idle or on freeway. And simply increasing blower speed doesn't increase commanded fan speed after they have stopped. Only acceleration in drive or popping the gas pedal will bring commanded request for fans above 10% after they have shutoff.  And of course when the fans are off and the AC is on and at idle vent temperatures immediately begin to increase. Without air flowing across the condenser the AC might as well not even be on.  How do I go about diagnosing whether it's the fan module? or the fans motors themselves? 

[Jsdirt]

You would need to know the amp draw of a few good fans, and compare that to what yours are drawing. I suspect the fans are dying, and requiring more amps to move than they should.