2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 298

TIGHTEN GAS CAP This message may display along with the check engine light on the instrument panel cluster if the vehicle's fuel cap is not tightened properly. See Malfunction Indicator Lamp on page 4‑42. Reinstall the fuel cap fully. See Filling the Tank on page 6‑12. The diagnostic system can determine if the fuel cap has been left off or improperly installed. A loose or missing fuel cap allows fuel to evaporate into the atmosphere. A few driving trips with the cap properly installed should turn this light and message off. TIRE LOW ADD AIR TO TIRE If your vehicle has the Tire Pressure Monitor System (TPMS), this message displays when the pressure in one or more of the vehicle's tires is low. This message also displays LEFT FRT (left front), RIGHT FRT (right front), LEFT RR (left rear), or RIGHT RR (right rear) to indicate the location of the low tire. The low tire pressure warning light will also come on. See Tire Pressure Light on page 4‑41. You can receive more than one tire pressure message at a time. To read the other messages that may have been sent at the same time, press the set/reset button or the trip odometer reset stem. If a tire pressure message appears on the DIC, stop as soon as you can. Have the tire pressures checked and set to those shown on the Tire Loading Information label. See Tires on page 6‑70, Loading the Vehicle on page 5‑33, and Inflation - Tire Pressure on page 6‑80. The DIC also shows the tire pressure values. See "DIC Operation and Displays (With DIC Buttons)" earlier in this section. TIRE LEARNING ACTIVE If your vehicle has the Tire Pressure Monitor System (TPMS), this message displays when the system is re-learning the tire positions on your vehicle. See "DIC Operation and Displays (Without DIC Buttons)" earlier in this section for more information. The tire positions must be re-learned after rotating the tires or after replacing a tire or sensor. See Tire Inspection and Rotation on page 6‑88, Tire Pressure Monitor System on page 6‑83, and Inflation - Tire Pressure on page 6‑80 for more information. 4-74