2007 Chevrolet Tahoe Owner's Manual - Page 499

What to Use Refer to the Maintenance Schedule to determine what kind of lubricant to use. See Recommended Fluids and Lubricants on page 590. Headlamp Aiming The vehicle has a visual optical headlamp aiming system. The aim of the headlamps have been preset at the factory and should need no further adjustment. However, if the vehicle is damaged in an accident, the aim of the headlamps may be affected and adjustment may be necessary. If oncoming vehicles flash their high beams at you, this may mean the vertical aim of your headlamps needs to be adjusted. It is recommended that the vehicle is taken to your dealer/retailer for service if the headlamps need to be adjusted. It is possible however, to re-aim the headlamps as described in the following procedure. The vehicle should be properly prepared as follows: • The vehicle should be placed so the headlamps are 25 ft. (7.6 m) from a light colored wall. • The vehicle must have all four tires on a level surface which is level all the way to the wall. • The vehicle should be placed so it is perpendicular to the wall. • The vehicle should not have any snow, ice, or mud on it. • The vehicle should be fully assembled and all other work stopped while headlamp aiming is being performed. • The vehicle should be normally loaded with a full tank of fuel and one person or 160 lbs (75 kg) sitting on the driver's seat. • Tires should be properly inflated. • The spare tire is in its proper location in the vehicle. Headlamp aiming is done with the vehicle's low-beam headlamps. The high-beam headlamps will be correctly aimed if the low-beam headlamps are aimed properly. 499