Owner Checks And Services - Cadillac STS 2011 Owner's Manual

First Engine Oil Change After Every
160 000 km/100,000 Miles
Automatic transmission fluid and filter change
(normal service). See Automatic Transmission
Fluid on page 6 23.
All wheel drive only: Transfer case fluid change
(normal service). Check vent hose at transfer case
for kinks and proper installation. Check to be sure
vent hose is unobstructed, clear, and free of
debris.
Spark plug replacement and spark plug wires
inspection. An Emission Control Service.
First Engine Oil Change After Every
240 000 km/150,000 Miles
Engine cooling system drain, flush, and refill
(or every five years, whichever occurs first). See
Engine Coolant on page 6 25. An Emission
Control Service.
Engine drive belts inspection for fraying, excessive
cracks, or obvious damage (or every 10 years,
whichever occurs first). Replace, if needed.

Owner Checks and Services

Starter Switch Check
WARNING:
When you are doing this inspection, the vehicle
could move suddenly. If the vehicle moves, you or
others could be injured.
1. Before starting this check, be sure there is enough
room around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. See Parking Brake on page 3 33.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle
should start only in P (Park) or N (Neutral). If the
vehicle starts in any other position, contact your
dealer for service.
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