2005 GMC Sierra 1500 Pickup Owner's Manual - Page 339

If you have traction assist, it will improve your ability to accelerate when driving on a slippery road. But you can turn the traction assist system off if you ever need to. You should turn the system off if your vehicle ever gets stuck in sand, mud, ice or snow. See If You Are Stuck: In Sand, Mud, Ice or Snow on page 4-48. Even though your vehicle has a traction system, you will want to slow down and adjust your driving to the road conditions. Under certain conditions, you may want to turn the traction assist system off, such as when driving through deep snow and loose gravel, to help maintain vehicle motion at lower speeds. See Traction Assist System (TAS) on page 4-8. If you do not have a traction system, accelerate gently. Try not to break the fragile traction. If you accelerate too fast, the drive wheels will spin and polish the surface under the tires even more. What is the worst time for this? Wet ice. Very cold snow or ice can be slick and hard to drive on. But wet ice can be even more trouble because it may offer the least traction of all. You can get wet ice when it is about freezing (32°F; 0°C) and freezing rain begins to fall. Try to avoid driving on wet ice until salt and sand crews can get there. Whatever the condition - smooth ice, packed, blowing, or loose snow - drive with caution. Your anti-lock brakes improve your vehicle's stability when you make a hard stop on a slippery road. Even though you have an anti-lock braking system, you will want to begin stopping sooner than you would on dry pavement. See Anti-Lock Brake System (ABS) on page 4-6. • Allow greater following distance on any slippery road. • Watch for slippery spots. The road might be fine until you hit a spot that is covered with ice. On an otherwise clear road, ice patches may appear in 4-45