User manual GMC SIERRA 1999

[. . . ] yellowblue The 1999 GMC Sierra Owner's Manual 1-1 2-1 3-1 4-1 5-1 6-1 7-1 8-1 Seats and Restraint Systems This section tells you how to use your seats and safety belts properly. It also explains the air bag system. Features and Controls This section explains how to start and operate your vehicle. Comfort Controls and Audio Systems This section tells you how to adjust the ventilation and comfort controls and how to operate your audio system. Your Driving and the Road Here you'll find helpful information and tips about the road and how to drive under different conditions. Problems on the Road This section tells you what to do if you have a problem while driving, such as a flat tire or overheated engine, etc. Service and Appearance Care Here the manual tells you how to keep your vehicle running properly and looking good. Maintenance Schedule This section tells you when to perform vehicle maintenance and what fluids and lubricants to use. Customer Assistance Information This section tells you how to contact GMC for assistance and how to get service and owner publications. It also gives you information on "Reporting Safety Defects" on page 8-10. 9-1 Index Here's an alphabetical listing of almost every subject in this manual. You can use it to quickly find something you want to read. i yellowblue We support voluntary technician certification. GENERAL MOTORS, GM, the GM Emblem, GMC, the GMC Emblem and the name SIERRA are registered trademarks of General Motors Corporation. [. . . ] The greatest of these is the terrain itself. "Off-roading" means you've left the great North American road system behind. Surfaces can be slippery, rough, uphill or downhill. In short, you've gone right back to nature. Off-road driving involves some new skills. And that's why it's very important that you read this guide. You'll find many driving tips and suggestions. These will help make your off-road driving safer and more enjoyable. If you think you will need some more ground clearance at the front of your vehicle, you can easily remove the front bumper lower air dam. All you'll need is a flat-blade screwdriver of the proper size. The front bumper lower air dam is held in place by a series of push pins located around the lower edge of the front bumper. The push-pins are accessible from underneath the front bumper. 4-14 yellowblue The following steps must be performed on each of the push-pins to remove the air dam: 1. Insert the blade portion of a flat-blade screwdriver into the push-pin slot and pull downward until the push-pin snaps loose. Pull the push-pins and lower air dam assembly away from the retainers until the lower air dam is free. When you're back on roads, though, be sure to replace the air dam. 2. While continuing to pull downward on the push-pin, squeeze and rotate the expandable end of the push-pin with your fingers or a pair of pliers until it releases from the retainer. NOTICE: Operating your vehicle for extended periods without the front bumper lower air dam installed can cause improper air flow to the engine and may allow things like fog lamps or tow hooks on the front of your vehicle to be damaged. Always be sure to replace the front bumper air dam when you're finished off-road driving. 4-15 yellowblue To replace the lower air dam: 1. Line up each push-pin with it's intended retainer and push the washer portion of the push-pin towards the retainer until it locks into place. Push the flat end of the push-pin towards the retainer until it locks into place, making sure each is secure. 4-16 yellowblue Before You Go Off-Roading There are some things to do before you go out. For example, be sure to have all necessary maintenance and service work done. Check to make sure all underbody shields (if so equipped) are properly attached. Be sure you read all the information about your four-wheel-drive vehicle in this manual. Are the fluid levels up where they should be?What are the local laws that apply to off-roading where you'll be driving?If you don't know, you should check with law enforcement people in the area. [. . . ] 7-23 Recommended Fluids and Lubricants . 2-87 Maintenance, Low Washer Fluid . 2-60 Electrochromic Day/Night Rearview . 4-31 Normal Maintenance, Normal Replacement Parts . [. . . ]