GMC Sierra Denali Classic 2007 Owner's Manual page 338

What Kind of Engine Oil to Use
Look for two things:
•
GM6094M
Your vehicle's engine requires oil meeting
GM Standard GM6094M. You should
look for and use only an oil that meets
GM Standard GM6094M.
•
SAE 5W-30
As shown in the viscosity chart, SAE 5W-30
is best for your vehicle.
338
These numbers on an oil container show its
viscosity, or thickness. Do not use other
viscosity oils such as SAE 20W-50.
You should look for this information on the oil
container, and use only those oils that are identified
as meeting GM Standard GM6094M and have the
starburst symbol on the front of the oil container.
Notice: Use only engine oil identified as
meeting GM Standard GM6094M and showing
the American Petroleum Institute Certified
For Gasoline Engines starburst symbol. Failure
to use the recommended oil can result in
engine damage not covered by your warranty.
®
GM Goodwrench oil meets all the requirements
for your vehicle.
Oils meeting these
requirements should
also have the starburst
symbol on the container.
This symbol indicates
that the oil has been
certified by the
American Petroleum
Institute (API).