2008 Hummer H2 Owner's Manual - Page 212

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 3-42. Reinstall the fuel cap fully. See Filling the Tank on page 5-7. 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. TRACTION CONTROL OFF This message displays when you turn off the Traction Control System (TCS) or when the TCS has been automatically disabled. Adjust your driving accordingly. See Traction Control System (TCS) on page 4-5 and StabiliTrak® System on page 4-7 for more information. TCS may be automatically disabled due to overheating, which could occur if the TCS activates continuously for an extended period of time. TRANSMISSION HOT IDLE ENGINE Notice: If you drive your vehicle while the transmission fluid is overheating and the transmission temperature warning is displayed on the instrument panel cluster and/or DIC, you can damage the transmission. This could lead to costly repairs that would not be covered by your warranty. Do not drive your vehicle with overheated transmission fluid or while the transmission temperature warning is displayed. TIRE LEARNING ACTIVE This message displays when the Tire Pressure Monitor System (TPMS) is re-learning the tire positions on your vehicle. 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 5-67, Tire Pressure Monitor System on page 5-62, and Inflation - Tire Pressure on page 5-61 for more information. 3-62