Chevrolet 1979 Light Duty Truck Owner's Manual page 72

For both single and dual wheels, wheel nuts should be tightened
alternately and evenly to the correct torque in the sequence shown
below. Never use oil or grease on studs or nuts. Improperly
tightened wheel nuts could eventually allow the wheel to come
off while the truck is in motion, possibly causing loss of control.
(Also see the caution in the Service and Maintenance section of
this manual regarding the danger of mixing metric and customary
fasteners.)
Stowage Of Tire And Jack
CAUTION: Always securely restow the spare tire assembly, all jacking
equipment, and any covers or doors. using the means provided. This will
help keep such things from being thrown about and injuring people in
the truck in a n accident.
C-K - B LAZ E R
3- 8
( L78 1 5 )
X
( L R 78 1 5 )
X
( 7 .00 1 5 )
X
( 1 0.00 1 5 )
X
C K20 (8.75 1 6 . 5 )
x
( 9 . 50 1 6 5 )
X