Cadillac XT4 Owner Manual (GMNA-Localizing-MidEast-13527545) - 2020 -CRC - 9/16/19SERVICE AND MAINTENANCE 295Footnotes ā Maintenance ScheduleAdditional Required Services -Severe(1) Vehicles with different size frontand rear tires do not have tirerotation. See Tire Rotation 0 263.(2) Or every 12 months, whichevercomes first. More frequent passengercompartment air filter replacementmay be needed if driving in areas withheavy traffic, poor air quality, highdust levels, or environmentalallergens. Passenger compartment airfilter replacement may also be neededif there is reduced airflow, windowfogging, or odors. Your GM dealer canhelp determine when to replace thefilter.(3) Visually check all fuel and vaporlines and hoses for proper attachment,connection, routing, and condition.(4) Or every four years, whichevercomes first. If driving in dustyconditions, inspect the filter at eachoil change or more often as needed.See Engine Air Cleaner/Filter 0 234.(5) Do not directly power wash thetransfer case and/or front/rear axleoutput seals. High pressure water canovercome the seals and contaminatethe transfer case fluid. Contaminatedfluid will decrease the life of thetransfer case and/or axles and shouldbe replaced.(6) Or every five years, whichevercomes first. See Cooling System 0 235.(7) Or every 10 years, whichevercomes first. Inspect for fraying,excessive cracking, or damage; replace,if needed.(8) Replace brake fluid every fiveyears. See Brake Fluid 0 241.(9) Or every 12 months, whichevercomes first. See Wiper BladeReplacement 0 244.(10) Or every 10 years, whichevercomes first. See Gas Strut(s) 0 245.(11) Replace air conditioningdesiccant every seven years.