Engine Oil Additives / Engine Oil Flushes
Do not add anything to the oil. The recommended oils with the starburst symbol that meet GM Standard GM6094M are all that is needed for good performance and engine protection.
Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty.
See also:
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position.
► For automatic transmission vehicles, the ignition should turn to LOCK/OFF only ...
Traction Control System (TCS)
Warning Light
For vehicles with a
Traction Control System
(TCS) and StabiliTrak®
warning light, this
light comes on briefly
when the engine is started.
If it does not, have the vehicle serviced by you ...
Once a Month
• Tire inflation check. See Inflation - Tire Pressure.
• Tire wear inspection. See Tire Inspection and
Rotation. ...