2000 GMC Yukon Owner's Manual - Page 160

BATTERY If this message is displayed when the engine is running, you may have a problem with your charging system. TRANS FLUID HOT If you have an automatic transmission, you have a transmission temperature warning display contained in the message center. If the transmission fluid temperature becomes high, the message center will display this message. The battery display will also stay on while the key is in RUN until the engine is started. If the message stays on after starting the engine it could indicate a problem with the generator drive belt, or some other charging system problem. Have it checked right away. Driving with this message displayed could drain your battery. If you must drive a short distance with this message displayed, it helps to turn off all your accessories, such as the radio and the air conditioner. When the transmission enters the protection mode, you may notice a change in the transmission shifting patterns. When the transmission fluid temperature returns to normal, the display will turn off and the transmission shifting patterns will return to normal. NOTICE: If you keep driving your vehicle with the transmission TRANS FLUID HOT message displayed, you can damage the transmission. This could lead to costly repairs that may not be covered under your warranty. 2-83