2007 Chevrolet Cobalt Owner's Manual - Page 397

(k) If you drive regularly under dusty conditions, inspect the filter at each engine oil change. (l) If you drive regularly under dusty conditions, the filter may require replacement more often. (m) Visually inspect belt for fraying, excessive cracks, or obvious damage. Replace belt if necessary. (n) Drain, flush, and refill intercooler system. This service can be complex; you should have your dealer perform this service. See Engine Coolant on page 296 for what to use. Inspect hoses. Clean pressure cap and filler neck. Pressure test the system and pressure cap. Owner Checks and Services These owner checks and services should be performed at the intervals specified to help ensure the safety, dependability, and emission control performance of your vehicle. Your GM Goodwrench® dealer can assist you with these checks and services. Be sure any necessary repairs are completed at once. Whenever any fluids or lubricants are added to your vehicle, make sure they are the proper ones, as shown in Recommended Fluids and Lubricants on page 402. 397