Chevrolet 2008 T Series Owner's Manual page 261

(13) = Adjust tire pressures as indicated on the
Certification or Tire Information label for optimum
tire life. See Tires on page 5-64 for further details. Check
tires for excessive or abnormal wear or damage. Also
check for damaged wheels. Replace wheels and/or tires
as needed.
(14) = Check spring-to-axle U-bolts and shackle bolts
for proper torque. See the service manual for torque
sequence and specifications. When parts are replaced,
the torque must be checked and adjusted more often
during the first 6,000 miles (10 000 km). Check torque at
500 miles (800 km) and 2,000 miles (3 000 km) after
first use of parts.
(15) = Check complete exhaust system, including DPF
pressure lines, and cab areas near the exhaust system
for broken, damaged, missing, or out-of-position parts.
Also inspect for open seams, holes, loose connections, or
other conditions which could let exhaust fumes seep into
the driver compartment. Needed repairs should be made
at once. To help maintain system integrity, replace
exhaust pipes whenever a new muffler is put on.
(16) = Adjust valve lash. Incorrect valve clearance will
result in increased engine noise and reduced engine
output.
(17) = With the engine off and below normal operating
temperature, check to see that the thermostatically
controlled engine cooling fan can be rotated by hand
on viscous-operated drives. Replace as needed.
(18) = Check shields and underhood insulation for
damage or looseness. Adjust or replace as needed.
(19) = Wheel bearing service:
•
Grease type – Clean, inspect, and lubricate
with the proper wheel bearing grease at designated
intervals or when hubs are removed. See Part C:
Recommended Fluids and Lubricants on page 6-27.
•
Oil-filled type – Some wheel bearings are lubricated
by axle lubricant. When you have oil-filled hubs, use
lubricant identical to that used in the axle. Lubricant
change intervals are the same for front and rear
axles. However, you must maintain the proper oil
level between change intervals. See Front Wheel
Bearings with Oil-Filled Hubs on page 5-63 and
Part C: Recommended Fluids and Lubricants on
page 6-27.
(20) = Check the air intake system installation to
see that gaskets are seated properly and all hose
connections, fasteners, and other components are tight.
Tighten connections and fasteners or replace parts
as required.
6-19