2009 GMC Sierra 1500 Crew Cab Owner's Manual - Page 340

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. Loading Your Vehicle for Off-Road Driving { CAUTION: • Cargo on the load floor piled higher than the seatbacks can be thrown forward during a sudden stop. You or your passengers could be injured. Keep cargo below the top of the seatbacks. Unsecured cargo on the load floor can be tossed about when driving over rough terrain. You or your passengers can be struck by flying objects. Secure the cargo properly. Heavy loads on the roof raise the vehicle's center of gravity, making it more likely to roll over. You can be seriously or fatally injured if the vehicle rolls over. Put heavy loads inside the cargo area, not on the roof. Keep cargo in the cargo area as far forward and low as possible. • • 4-14