1999 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 147

yellowblue The anti-lock brake system warning light should come on briefly when you turn the ignition key to RUN. If the light doesn't come on then, have it fixed so it will be ready to warn you if there is a problem. The "Problems on the Road," section of this manual shows what to do. See "Engine Overheating" in the Index. Engine Coolant Temperature Gage This gage shows the engine coolant temperature. Transmission Temperature Gage (If Equipped) If your vehicle has a heavy duty automatic transmission, you will have a transmission temperature gage. It also provides an indicator of how hard your vehicle is working. During a majority of the operation, the gage will read 210_F (100_C) or less. If you are pulling a load or going up hills, it is normal for the temperature to fluctuate and approach the 250_F (122_C) mark. If the gage reaches the 260_F (125_C) mark, it indicates that the cooling system is working beyond its capacity. When your ignition is on, the gage shows the temperature of the transmission fluid. The normal operating range is from 100_F (38_C) to about 265_F (130_C). 2-75