High Altitude Counties

The following is a list of high altitude counties:


State of Colorado

Fremont Montezuma
Adams Montrose
Alamosa Garfield Morgan
Arapahoe Gilpin Otero
Archuleta Grand Ouray
Boulder Gunnison Park
Chaffee Hinsdale Pitkin
Cheyenne Huerfano Pueblo
Clear Creek Jackson Rio Blanco
Conejos Jefferson Rio Grande
Costilla Kit Carson Routt
Crowley Lake Saguache
Custer La Plata San Juan
Delta Larimer San Miguel
Denver Las Animas Summit
Dolores Lincoln Teller
Douglas Mesa Washington
Eagle Mineral Weld
Elbert Moffat
El Paso

State of Nevada

Carson City Humbolt Nye
Douglas Lander Pershing
Elko Lincoln Storey
Esmeralda Lyon Washoe
Eureka Mineral White Pine

State of New Mexico

Bernalillo Lincoln San Juan
Catron Los Alamos San Miguel
Colfax Luna Santa Fe
Curry McKinley Sierra
De Baca Otero Socorro
Grant Mora Taos
Guadalupe Rio Arriba Torrance
Harding Roosevelt Union
Hidalgo Sandoval Valencia

State of Utah

Beaver Iron Sanpete
Box Elder Jaub Sevier
Cache Kane Summit
Carbon Millard Tooele
Daggett Morgan Uintah
Davis Piute Utah
Duchesne Rich Wasatch
Emery Salt Lake Wayne
Garfield San Juan Weber
Grand
DEALERS AND CUSTOMER INFORMATION Owners of the 1986 low altitude vehicles taking up permanent residence in one of these high altitude counties, should be encouraged to have these adjustments performed when vehicles are brought in for service. After performing these adjustments, dealers should advise customers that, IF THE VEHICLE IS RETURNED TO CONTINUOUS, LOW ALTITUDE OPERATION, THE ENGINE SHOULD BE RE-ADJUSTED TO LOW ALTITUDE SPECIFICATION PER THE CORRECT CHASSIS SERVICE MANUAL FOR IMPROVED PERFORMANCE. IF RE-ADJUSTED TO LOW ALTITUDE SPECIFICATIONS, THE SUPPLEMENTAL LABEL SHOULD BE REMOVED.