Engine Oil Additives/Engine Oil Flushes
Do not add anything to the oil. The recommended oils with the dexos specification and displaying the dexos certification mark 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:
Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehic ...
Rear Windows
Power Sliding Rear Window
On vehicles with a power sliding rear window, the switch is located in the overhead console.
The power sliding rear window works when the ignition has been turned to ACC/ ...
Place a Call Using a Stored Number
1. Push . System responds:
“OnStar ready.” 2. Say “Call <name tag>.” System responds: “OK, calling <name tag>.” ...