Other information:
For diesel engine vehicles, see “Fuel for Diesel Engines” in the Duramax diesel
supplement.
If the vehicle has a yellow fuel cap or a yellow sticker on the fuel door, E85
or FlexFuel can be used. If the vehicle does not have a yellow fuel cap or yellow
sticker, do not use gasoline with ethanol levels greater than 15% by volume...
Locks
Locks are lubricated at the factory. Use a de-icing agent only when absolutely
necessary, and have the locks greased after using. See Recommended Fluids and Lubricants.
Washing the Vehicle
To preserve the vehicle's finish, wash it often and out of direct sunlight...
.