Chevrolet Low Cab Forward 6.0L Gasoline Engine 3500/4500 Series (GMNA-
Localizing-U.S.-12533400) - 2019 - CRC - 11/19/18
Service and Maintenance
279
27. DRIVESHAFT FLANGE
TORQUE :
Check the fixing bolts of
driveshaft flange for looseness or
damage first 12 000 km
(7,500 miles). Retighten the fixing
bolts to the specified torque every
24 000 km (15,000 miles). Specified
tightening torque.
Driveshaft flange tightening torque
103
Y
(76 lb·ft)
28. LEAF SPRING U-BOLT
TORQUE :
Tighten the U-Bolt nuts
to the specified torque at 1 040 km
(650 miles), 12 000 km (7,500 miles)
and thereafter each 24 000 km
(15,000 miles). Specified tightening
torque.
Leaf spring U-bolt nut tightening
torque
Front
127
Y
(94 lb·ft)
Rear
177
Y
(131 lb·ft)
29. WHEEL NUT TORQUE :
Check
tires for excessive or abnormal
wear, or damage. Also check tire
inflation pressures and adjust. Be
sure wheels are not bent or cracked
and that wheel nuts have been
tightened to the specified torque at
1 040 km (650 miles) and then every
12 000 km (7,500 miles).
Wheel nut tightening torque
500
Y
(362 lb·ft)
30. KING PIN :
Lubricate the grease
fitting on the king pins every
12 months or 12 000 km
(7,500 miles) whichever occurs first.
31. DRIVESHAFT :
Lubricate the
grease fitting on each universal joint
and spline coupling at 12 months or
24 000 km (15,000 miles) whichever
occurs first.
32. WHEEL HUB BEARING
GREASE :
Clean and repack front
wheel bearings at every brake
relining or 48 000 km (30,000 miles)
whichever comes first.
33. ACCESSORY DRIVE BELT :
Replace the belt that drives the A/C
compressor every 160 000 km
(100,000 miles).
34. AIR CONDITIONER BLOWER
FILTER :
The air conditioner blower
filter should be removed and
cleaned once a month.
35. Wiper Blades :
Inspect wiper
blades for wear, cracking,
or contamination. Clean the
windshield and wiper blades,
if contaminated, replace wiper
blades that are worn or damaged,
or at least once a year. See
.
