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:
Collision Parts
Genuine GM Collision parts are new parts made
with the same materials and construction methods
as the parts with which your vehicle was
originally built. Genuine GM Collision parts are
your best c ...
Recommended Fluids and Lubricants
...
Vehicle Load Limits
It is very important to know how
much weight the vehicle can
carry. This weight is called the
vehicle capacity weight and
includes the weight of all
occupants, cargo, and all
nonfactory-in ...