2006 GMC Yukon Owner's Manual - Page 205

Notice: If you drive your vehicle with the transmission temperature gage above normal operating range, you can damage the transmission. This could lead to costly repairs that would not be covered by your warranty. Do not drive your vehicle while the transmission temperature gage reading is above normal. See your dealer for service. The following situations can cause the transmission to operate at higher temperatures: Tire Pressure Light If your vehicle is equipped with the Tire Pressure Monitor system, this light will come on if the system detects low tire pressure. Towing a trailer Hot outside air temperatures Hauling a large or heavy load Vehicle overloading Low transmission fluid level High transmission fluid level Restricted air flow to the radiator and the auxiliary transmission oil cooler (if equipped). A CHECK TIRE PRESSURE DIC message will accompany the light. This light will also come on briefly as you start the engine. See Tire Pressure Monitor System on page 5-64 for more information. For more information on your tires, see Tires on page 5-57. A temporary solution to hotter transmission operating temperatures may be to let the transmission cool down. If the transmission is operated at higher temperatures on a frequent basis, see Scheduled Maintenance on page 6-4 for the proper transmission maintenance intervals. 3-45