Chevrolet 1980 Light Duty Truck Service Manual page 215

procedure of components in this portion of the manual as indicated at
appropriate locations by the terminology "See Notice on page 1 of this
Section".
could affect the performance of vital components and systems, and/or
could result in major repair expense. It must be replaced with one of the
same part number or with an equivalent part if replacement becomes
necessary. Do not use a replacement part of lesser quality or substitute
design. Torque values must be used as specified during reassembly to
assure proper retention of this part.
General Description......................................................................... ..3B4-1
Diagnosis........................................................................................... ..3B4-2
Maintenance and Adjustments......................................................... 3B4-16
On-Vehicle Service........................................................................... ..3B4-18
Specifications........................................... ...........................................3 B 4- 51
Special Tools.......................................................................................3B4-52
FUNCTIO N LOCKING CO LUM NS
The function locking energy absorbing steering column
includes three important features in addition to the steering
function:
1. The column is energy absorbing, designed to
compress in a front-end collision to minimize the possibility
of injury to the driver of the vehicle.
2. The ignition switch and lock are mounted
conveniently on the column.
3. With the column mounted lock, the ignition,
steering and gearshifting operation can be locked to inhibit
theft of the vehicle.
The function locking energy abosrbing column may be
easily disassembled and reassembled. The serviceman
should be aware that it is important that only the specified
screws, bolts and nuts be used as designated and that they
are tightened to their specified torque. This precaution will
insure the energy absorbing action of the assembly. Over­
length bolts should not be used, as they may prevent a
portion of the assembly from compressing under impact.
Equally as important is correct torque of bolts and nuts.
SECTION 3B4
STEERING COLUMNS
The following notice applies to one or more steps in the assembly
This fastener is an important attaching part in that it
NOTICE:
CONTENTS
C-Series, K-Series......................................................................... ..3B4-18
G-Series, P-Series......................................................................... ..3B4-35
GENERAL DESCRIPTION
STEERING CO LUM NS
Care should be taken to assure that the bolts or nuts
securing the column mounting bracket to the instrument
panel are torqued to the proper specification in order that
the bracket will break away under impact.
When the function locking energy absorbing column
assembly is installed in a vehicle, it is no more susceptible
to damage through usage than an ordinary column;
however, when the column is removed, special care must
be taken in handling this assembly. Only the specified wheel
puller should be used. When the column is removed from
the vehicle, such actions as a sharp blow on the end of the
steering shaft or shift lever, leaning on the column assembly,
or dropping of the assembly could shear or loosen the plastic
fasteners that maintain column rigidity. It is, therefore,
important that the removal and installation and the
disassembly and reassembly procedures be carefully
followed when servicing the assembly.
3B4-1
LIG H T T R U CK SERV ICE M ANUAL