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:
A Transformative Engine
You might be thinking, "How can GMC's compact pickup feel like a muscle car?"
Well, there's more to it than stuffing a 5.3-liter V-8 under the hood, but that
engine goes a long way towar ...
Emissions Inspection and Maintenance Programs
Some local governments may have programs to inspect the on-vehicle emission control equipment.
For the inspection, the emission system test equipment is connected to the vehicle’s Data Link Connect ...
Filling the Tank
If the vehicle has a diesel engine, see the Duramax diesel supplement for more information.
WARNING
Fuel vapor burns violently and a fuel fire can cause bad injuries.
To help avoid injuries to you ...