Cadillac 2013 ATS Owner's Manual page 304

11-4 Service and Maintenance
Additional Maintenance Every
250 000 km or Every Five
Years, Whichever Occurs First
Engine cooling system drain,
flush and refill (or every five
years, whichever occurs first).
Conditions Requiring More
Frequent Maintenance (Severe
Service)
Extreme temperatures
Heavy city traffic
Hilly or mountainous terrain
Dusty, muddy or off-road
conditions
Commercial use or trailer towing
Most trips less than 6 km
Note: All vehicles with rear-wheel
drive change driveline axle oil
every 30 000 km, if vehicle is used
for towing purposes.