2008 GMC Acadia Owner's Manual - Page 216

STARTING DISABLED SERVICE THROTTLE This message displays when your vehicle's throttle system is not functioning properly. Have your vehicle serviced by your dealer/retailer. 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 5-62, Tire Pressure Monitor System on page 5-57, and Inflation - Tire Pressure on page 5-55 for more information. THEFT ATTEMPTED This message displays if the content theft-deterrent system has detected a break-in attempt while you were away from your vehicle. See Content Theft-Deterrent on page 2-21 for more information. TRACTION CONTROL OFF This message displays when the Traction Control System (TCS) is turned off. Adjust your driving accordingly. See StabiliTrak® System on page 4-6 for more information. This message clears itself after 10 seconds. 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 3-50. Reinstall the fuel cap fully. See Filling the Tank on page 5-9. 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. 3-74