2009 Hummer H3T Alpha Owner's Manual - Page 275

Service and Appearance Care 5-39 Front Axle It is not necessary to regularly check front axle fluid unless a leak is suspected or an unusual noise is heard. A fluid loss could indicate a problem. It is recommended that the front axle fluid be checked and filled by your dealer/retailer. Headlamp Aiming The vehicle may have a visual optical headlamp aiming system. The aim has been preset at the factory and should need no further adjustment. However, if the vehicle is damaged in a crash, the headlamp aim may be affected and adjustment may be necessary. If oncoming vehicles flash their high beams at you, this may also mean the vertical aim needs to be adjusted. It is recommended that the vehicle is taken to your dealer/retailer for service if the headlamps need to be re-aimed. It is possible however, to re-aim the headlamps as described. The vehicle should be: • Placed so the headlamps are 25 ft. (7.6 m) from a light colored wall or other flat surface. • On a level surface which is level all the way to a wall. • Placed so it is at a right angle to the wall or other flat surface. • Clear of any snow, ice, or mud on it. • Fully assembled, the tires properly inflated, and all other work stopped while headlamp aiming is being performed. • Normally loaded with the spare tire in its original location and a full tank of fuel and one person or 160 lbs (75 kg) sitting on the driver seat.