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Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Vehicle Care 323
Tire Load and Inflation Table—Gas Engines
TIRES FOR VEHICLES IN HIGHWAY SERVICE
TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
Tire Size Designation Cold Inflation Pressure (psi) 65 70 75 80 85 90 95 100 105 110
LT215/85R16E Dual Single(lbs) 2470
2680
225/70R19.5F Dual Single(lbs) 3415
3640
225/70R19.5G Dual Single(lbs)
3750
3970
See Wheels and Tires 0308.
Tire Rotation
{Warning
Be sure to check the wheel studs,
wheel nuts and disc wheel for any
abnormality whenever the disc
wheel is removed.
(Continued)
Warning (Continued)
If you find any abnormal condition
on the wheel studs, wheel nuts or
disc wheel, do not continue to use
the wheel. Contact the nearest
dealer as soon as possible
Tires at different locations wear
differently. For uniform tire wear and
longer tire life, you should rotate the
tires on your vehicle regularly. Make
sure to use tires of the same type on the same axle. If you install tires
of different types on the same axle,
the vehicle may drift right or left
when you apply the brakes.
New tires are more likely to build up
heat and wear faster than old tires,
so they should be installed on the
front axle where the load is smaller.
If there is a difference in diameter
between the inner and outer tires of
a dual-tire wheel, install the smaller
diameter tire inside.
Page 356 of 414

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Service and Maintenance 355
bolts to the specified torque every
24 000 km (15,000 miles). Specified
tightening torque.Driveshaft flange tightening torque
103Y(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
500Y(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.
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Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
366 Service and Maintenance
25. Automatic Transmission
Fluid :Check the automatic
transmission fluid level at each
engine oil change and replace fluid
every 48 000 km (30,000 miles). Do
not overfill.
26. Differential Gear Oil : Replace
lubricant every 48 000 km
(30,000 miles). Check lubricant level
every 16,000 km (10,000 miles) or
every 12 months, and add lubricant
to within 0 to 10 mm (0 to 0.4 inch)
of the bottom edge of the filler hole
if necessary.
27. Power Steering Fluid :
Replace power steering fluid every
24 months or 48 000 km
(30,000 miles), whichever occurs
first.
28. Power Steering Oil Hoses :
Replace power steering oil hoses
every 24 months or 80 000 km
(50,000 miles), whichever occurs
first.
29. Steering Wheel Free Play :
Check steering wheel free play after
the first 1 040 km (650 miles) and
then every 10 400 km (6,500 miles). Steering wheel free play
10-50 mm (0.39-1.97 in)
30. Steering Gear Box Torque :
Retighten the attaching bolts of the
steering gear box to the specified
torque every 12 months or every
32 000 km (20,000 miles) whichever
occurs first. Steering gear box tightening torque
103 Y(76 lb·ft)
31. Driveshaft Flange Torque :
Check the fixing bolts of driveshaft
flange for looseness or damage
after the first 16 000 km
(10,000 miles). Driveshaft flange tightening torque
103Y(76 lb·ft)
32. Driveshaft Lubrication :
Lubricate the grease fitting on the
center bearing, as well as each
universal joint and spline coupling
every 12 months or 16 000 km
(10,000 miles) whichever occurs
first. 33. Leaf Spring U-bolt Torque :
Tighten the U-Bolt nuts to the
specified torque after the first
1 040 km (650 miles), thereafter
every 16 000 km (10,000 miles).
Model Leaf spring U-bolt nut tightening torque
Front Rear
3500HD 127 Y
(94 lb·ft) 177
Y
(131 lb·ft)
4500HD 127 Y
(94 lb·ft) 177
Y
(131 lb·ft)
4500XD 196 Y
(145lb·ft) 177
Y
(131 lb·ft)
5500HD, 5500XD 196
Y
(145lb·ft) 284
Y
(209 lb·ft)
34. 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 after the first 1,040 km
(650 miles) and then every