2010 Cadillac CTS Owner's Manual - Page 423

Service and Maintenance First Engine Oil Change After Every 40 000 km/25,000 Miles . . 10-5 CTS-V only: Clutch hydraulic system drain, flush, and refill. CTS-V only: Brake hydraulic system drain, flush, and refill (severe service only) for vehicles used for high performance operation. . Fuel system inspection for damage or leaks. Passenger compartment air filter replacement (or every 12 months, whichever occurs first). More frequent replacement may be required if vehicle is driven regularly under dusty conditions. CTS-V only: 6‐speed manual transmission fluid change (severe service) for vehicles mainly driven in heavy city traffic in hot weather, in hilly or mountainous terrain, when frequently towing a trailer, or used for taxi, police, or delivery service. . CTS-V only: 6‐speed manual transmission fluid change (normal service). All-wheel-drive vehicles only: Transfer case fluid change (severe service) for vehicles mainly driven in heavy city traffic in hot weather, in hilly or mountainous terrain, when frequently towing a trailer, or used for taxi, police, or delivery service. During any maintenance, if a power washer is used to clean mud and dirt from the underbody, care should be taken to not directly spray the transfer case output seals. High pressure water can overcome the seals and contaminate the transfer case fluid. Contaminated fluid will decrease the life of the transfer case and should be replaced. . . First Engine Oil Change After Every 80 000 km/50,000 Miles . . Engine air cleaner filter replacement. See Engine Air Cleaner/Filter on page 9‑15. Automatic transmission fluid change (severe service) for vehicles mainly driven in heavy city traffic in hot weather, in hilly or mountainous terrain, when frequently towing a trailer, or used for taxi, police, or delivery service. See Automatic Transmission Fluid on page 9‑13. .