(i) Drain, flush, and refill cooling system. Thisservice can be complex; you should haveyour dealer perform this service. See EngineCoolant on page 357 for what to use. Inspecthoses. Clean radiator, condenser, pressurecap, and filler neck. Pressure test the coolingsystem and pressure cap.(j) If using DOT-4 brake fluid only: Drain, flush,and refill brake hydraulic system at a regularmaintenance service (I or II) every two years.This service can be complex; you shouldhave your dealer perform this service. SeeBrakes on page 372.(k) A fluid loss in any vehicle system couldindicate a problem. Have the system inspectedand repaired and the fluid level checked. Addfluid if needed.(l) Change fluid if the vehicle is used for highperformance operation.(m) Change fluid whenever the vehicle has beendriven for 3,000 miles (5 000 km) with thetransmission temperature at 290°F (143°C) orhigher without using an auxiliary fluid cooler. SeeMessage Center (CTS-V) on page 209 andTransmission Fluid Hot Message on page 214.(n) If you drive regularly under dusty conditions,inspect the filter at each engine oil change.(p) Visually inspect belt for fraying, excessivecracks, or obvious damage. Replace belt ifnecessary.Owner Checks and ServicesThese owner checks and services should beperformed at the intervals specified to help ensurethe safety, dependability, and emission controlperformance of your vehicle. Your GMGoodwrench® dealer can assist you with thesechecks and services.Be sure any necessary repairs are completed atonce. Whenever any fluids or lubricants are addedto your vehicle, make sure they are the properones, as shown in Recommended Fluids andLubricants on page 474.469
