Chevrolet 1979 Light Duty Truck Owner's Manual page 71

Wheel N ut Torque
CAUTION:
Truck s .With Single Wheels:
As soon as possible after instal ling a wheel-
at the intervals shown on the chart in the Maintenance Schedule
folder--have a meqhanic tighten wheel nuts with a torque wrench
to the correct torque listed on the chart which follows.
Trucks With Dual Wheals:
Have a mechanic tighten wheel nuts with a
torque wrench
both front and rear wheels. I n addition , when the truck, or
wheel, or fasteners are new, also have the torque set at the first
100, 1 ,000 , and 6,000 miles ( 160, l
This precaution i. � necessary because the clamping system used on
this type of wheel in some cases needs to seat before the fasteners
will hold a uniform clamp load and remain fully tightened.
Series
K 1 0
C, P 1 0
C. P20, 30
and
K20
Single Wheels
C, K, P30,
Dual Wheels
as stated above for single wheels , for
600 ,
. Description
7/16" Bolts (6)
1 /2" Bolts (5)
9/1 6" Bolts (8)
9/1 6" Bolts 18\
Heavy Duty
Wheels
5/8" Bolts ( 1 0)
3-7
600
and 9 kilometres).
Torque
70-90 Ft. Lbs.
75-100 Ft. Lbs.
90-120 Ft. Lbs.
1 1 0- 1 40 Ft. Lbs.
1 30-1 80 Ft. Lbs.
and