GMC 2010 T-Series Owner's Manual page 256

Footnotes
= The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to the
completion of the vehicle's useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
(1) = If your vehicle has an Allison Transmission
your owner manual is supplemented by an Allison
®
Transmission Operator's Manual. Always refer to these
manuals for related maintenance services.
(2) = An Emission Control Service.
(3) = A Noise Emission Control Device.
(4) = Applies to vehicles sold in the United States and is
recommended for vehicles sold in Canada.
(5) = Check fluid level in brake master cylinder, power
steering pump, front and rear axles, transmission, and
hydraulic spring parking brake pump, if equipped. A low
fluid level in the brake master cylinder can indicate worn
brake linings and should be checked accordingly.
6-18
(6) = Inspect brake lines and hoses for proper hook-up,
binding, leaks, cracks, chafing, etc. Inspect disc brake
pads for wear and rotors for surface condition. Inspect
caliper assemblies. Check brake pedal for excessive
free play or travel (or every 6 months, whichever occurs
first) and have serviced if needed. Check brakes more
often if driving habits and conditions result in frequent
braking.
(7) = Inspect parking brake drum and linings for wear or
cracks and check linkage and adjustment.
®
,
(8) = This vehicle has the Engine Oil Life System. This
system will show you when to change the engine oil
and filter
24 000 km (15,000 miles) since your last oil change.
Under severe conditions, the indicator may come on
before 5 000 km (3,000 miles). Never drive your vehicle
more than 24 000 km (15,000 miles) or 12 months
without an oil and filter change.
Remember to reset the Engine Oil Life System
whenever the oil is changed. For more information, see
Engine Oil Life System on page 5 19.
(9) = Inspect rear axle air shift motor for fluid leaks.
Remove plug to check fluid level. Inspect air lines and
hoses for proper hook-up, binding, leaks, etc. Inspect at
1 600 km (1,000 miles) and 36 000 km (22,500 miles)
and then every 36 000 km (22,500 miles) thereafter.
usually between 5 000 km (3,000 miles) and