On average, any location 5,000 feet above sea level is considered high altitude. In these elevations the air is thinner, and exposure to the lowered air density can affect operating components on the RV.

When traveling in high altitudes, frequently monitor the air-cooling systems to insure optimum airflow. Even one small plastic bag blocking the grill can reduce performance considerably.

Keep motors of operating components maintained with regular oil and filter changes to assure all systems are in optimum condition.

If your RV is equipped with an LP-generator, a switch may be installed to activate the system for high altitude operation.

Traveling to mountain locations can often mean encountering a new time zone and this will require reprogramming certain auto generator start systems.

Journeying up and down mountain passes mean adjusting driving styles. Be prepared by knowing what lies ahead. Detailed driving conditions, including grade percentages of steep inclines, are noted on maps, posted on the Internet, and listed in many RV travel directories. If you have any questions or concerns whether the RV can navigate a specific mountain pass, contact the local highway authority or state police for advice. It may be preferable to detour through a canyon, even if this takes you a few miles out of the way.

When starting up a grade, place the transmission in a lower gear. Keep up the RPM’s, and drive in a controlled manner. If possible, move to the right and allow traffic behind you to pass. Once you have reached the top, pull off onto a wide spot and allow the engine to cool.

Descend slowly. The key is to keep a slow, steady speed with minimal braking. This can be accomplished by using a lower gear, coupled with the exhaust brake, if one is installed. The odor of burning rubber during a mountain descent is warning the brakes are being overused. Pull safely off the road and allow the brakes to cool before continuing down the pass.

Electronic diesel engines may begin to de-rate at 12,000 feet. The high altitude can drop fuel delivery through the injector pump or raise temperature in the turbo. During de-rate the ECM will take action to protect the engine from damage by limiting speed and torque.

Higher altitude means colder climate. If temperatures unexpectedly fall, take the necessary steps to protect the batteries and holding tanks against freezing.