OnStar Services
See also:
Bulb Replacement
For the proper type of replacement bulbs, see Replacement Bulbs.
For any bulb changing procedure not listed in this section, contact your
dealer. ...
Engine Cooling System Messages
A/C OFF DUE TO HIGH ENGINE TEMP
This message displays when the engine coolant becomes hotter than the normal
operating temperature. To avoid added strain on a hot engine, the air
conditioning com ...
Tire Sealant
Read and follow the safe handling instructions on the label adhered to the sealant
canister.
Check the tire sealant expiration date on the sealant canister. The sealant canister
should be replace ...






