2004 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 212

A reading in the low pressure zone may be caused by a dangerously low oil level or some other problem causing low oil pressure. Check your oil as soon as possible. See Oil Pressure Low under DIC Warnings and Messages on page 3-65 and Engine Oil on page 5-17. Cruise Control Light The cruise light comes on whenever you set your cruise control. See "Cruise Control" under Turn Signal/Multifunction Lever on page 3-7. {CAUTION: Do not keep driving if the oil pressure is low. If you do, your engine can become so hot that it catches fire. You or others could be burned. Check your oil as soon as possible and have your vehicle serviced. Four-Wheel-Drive Light The four-wheel drive indicator will light up when you shift a manual transfer case into four-wheel drive and the front axle engages. Notice: Lack of proper engine oil maintenance may damage the engine. The repairs would not be covered by your warranty. Always follow the maintenance schedule in this manual for changing engine oil. Some delay between shifting and the indicator's lighting is normal. See Four-Wheel Drive on page 2-33 for more information. 3-52