I have a 2015 Silverado High Country. It only has 44740 miles. All of a sudden the AC went out and the Clutch does not engage. I have check fuses but am unable to locate the AC Clutch Relay. There is not a relay in the under hood fuse box in space 71. Haynes states the location is there. I have checked a 2017 Silverado LTZ and it also does not have the relay. Any suggestions are welcome. Thank you