1997 GMC Suburban Owner's Manual - Page 142

~~ ~ ~ ~~ Anti-Lock Brake System Warning Light With the anti-lock brake system, this light will come on when you start your engine and may stay on for several seconds. That's normal. Engine Coolant Temperature Gage This gage shows the engine coolant temperature. ANTI LOCK If the light stays on, or comes on when you're driving, your vehicle needs service. If the regular brake system warning light isn't on, you still have brakes, but you don't have anti-lock brakes. If the regular brake system warning light is also on, you don't have anti-lock brakes and there's a problem with your regular brakes. See "Brake System Warning Light'' earlier in this section. 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. It also provides an indicator of how hard your vehicle is working. During a majority of the operation, the gage If will read 210°F (100°C) or less. you are pulling a load or going up hills, it is normal for the temperature to fluctuate and approach the 260"F( 160" mark. If the C) mark, it indicates that gage reaches the 260"F( 160°C) the cooling system is working beyond its capacity. In "Problems on the Road," this manual shows what to do. See "Engine Overheating" in the Index.