GMC Yukon 2021 Owner's Manual page 7

6 Introduction
27. Trailer Brake Control Panel (If Equipped).
See Towing Equipment 0 287.
28. Data Link Connector (DLC) (Out of View).
See Malfunction Indicator Lamp (Check
Engine Light) 0 110.
29. Exterior Lamp Controls 0 133.
Fog Lamps 0 137 (If Equipped).
Instrument Panel Illumination Control
0 138.
30. Driver Mode Control 0 245.
Automatic Transfer Case Knob (If
Equipped). See Four-Wheel Drive 0 236.
Four Corner Air Suspension System 0 248
(If Equipped).