2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 390

Before You Go Off-Roading . Have all necessary maintenance and service work done. Make sure there is enough fuel, that fluid levels are where they should be, and that the spare tire is fully inflated. Be sure to read all the information about four-wheel-drive vehicles in this manual. Make sure all underbody shields, if the vehicle has them, are properly attached. Know the local laws that apply to off-roading where you will be driving or check with law enforcement people in the area. Be sure to get the necessary permission if you will be on private land. . If you think you will need some more ground clearance at the front of your vehicle, you can remove the front fascia lower air dam. The air dam is held in place by two bolts and 10 snaps accessible from underneath the front fascia. To remove the air dam: 1. Remove the two outboard air dam bolts. 2. With a flat‐blade tool, disengage the snaps. 3. After the bolts are removed and the snaps are disengaged, push forward on the air dam until it is free. Notice: Operating your vehicle for extended periods without the front fascia lower air dam installed can cause improper air flow to the engine. Always be sure to replace the front fascia air dam when you are finished off-road driving. After off-roading, be sure to reinstall the air dam: 1. Line up the snaps and push the air dam rearward to engage the snaps. 2. Install the two outboard bolts. . . . . 5-14