2012 GMC Canyon Owner's Manual - Page 134

5-26 Instruments and Controls SERV (Service) TPM (Tire Pressure Monitor) This message displays if a part on the Tire Pressure Monitor System (TPMS) is not working properly. The tire pressure light also flashes and then remains on during the same ignition cycle. See Tire Pressure Light on page 5‑17. Several conditions may cause this message to appear. See Tire Pressure Monitor Operation on page 10‑54 for more information. If the warning comes on and stays on, there may be a problem with the TPMS. See your dealer. Transmission Messages SERV (Service) 4WD (Four-Wheel Drive) This message displays when there is a problem with the transfer case control system. Check the transfer case on your vehicle and have it serviced by your dealer. See Four-Wheel Drive on page 9‑35 for more information about the transfer case. Press and release the reset stem to acknowledge the message and clear it from the display.