2001 GMC Sierra 1500 Pickup Owner's Manual - Page 241

To replace the lower air dam, do the following: 1. Line up each push-pin with its intended retainer and push the washer portion of the push-pin towards the retainer until it locks into place. 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. Is there enough fuel? Is the spare tire fully inflated? 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. Will you be on someone's private land? If so, be sure to get the necessary permission. 2. Push the flat end of the push-pin towards the retainer until it locks into place, making sure each is secure. Loading Your Vehicle for Off-Road Driving There are some important things to remember about how to load your vehicle. D The heaviest things should be on the load floor and forward of your rear axle. Put heavier items as far forward as you can. D Be sure the load is secured properly, so driving on the off-road terrain doesn't toss things around. 4-19