Table Of Contents; M Aintenance S C He D Ule; Oil And Filter Recom M Endations - Chevrolet 1977 light duty truck Service Manual

M aintenance S c he d ule...................................................... OB-1
E n g in e ..................................................................................... OB-1
Oil and Filter R e c om m end ation s.............................. OB-l
Drive B e lts......................................................................... OB-2
Positive Crankcase Ventilation (P.C.V.).................. OB-2
Air Injection Reactor System (A .l.R .).................... OB-3
Controlled Combustion System (C.C.S.)................. OB-3
E vaporation Control System (E.C.S.)...................... OB-3
Early Fuel Evaporation (E.F.E.) S ystem ................ OB-3
Air C le a n e r ........................................................................ OB-3
Fuel F ilt e r .......................................................................... OB-3
Accelerator L in k a g e ........................................................ OB-3
Automatic Transm ission.................................................. OB-3
M an u al T ra n s m is s io n ....................................................... OB-4
Transm ission Shift L in k ag e........................................... OB-4
Clutch...................................................................................... OB-4
M A IN T E N A N C E SCHEDULE
A separate m aintenance folder has been provided
with each vehicle which contains a complete schedule
and brie f explanation of the safety, emission control,
lubrication and general m aintenance it requires. The
m aintenance folder inform ation is supplemented by this
section o f this manual, as well as the separate vehicle
and emissions w arranty booklet also furnished with each
vehicle. Read all three
understanding o f vehicle m aintenance requirements.
The time or mileage intervals for lubrication and
m aintenance services outlined
intended as a general guide for establishing regular
m aintenance and lubrication periods for trucks with light
and heavy duty emission control systems (see chart).
Sustained heavy duty and high speed operation or
operation under adverse conditions may require more
frequent servicing.
LIGHT A N D H EA VY DUTY
EM ISSION C LA SS VEHICLES
L ig h t D u ty V ehicle
C lO -P ickup (exc. o v er 6000 lbs. GVW )
H eavy D u ty
C lO -P ickup (o v er 6000 lbs. G VW )
C IO -S uburban
C-10-Utility
C20-30 A ll models
A ll K m odels
A ll P m odels
SECTION OB
LUBRICATION
INDEX
publicatio n s for a full
in this section are
R ear A x le ...................................................................
Propeller Shaft Slip Joints...................................
Universal J o i n t s ........................................................
Wheel B earin g s.........................................................
Brake Master C ylinder..........................................
Brake and Clutch Pedal Springs........................
Parking B rake............................................................
S te e r in g ........................................................................
Hood Latch and Hood H inge.............................
Body L u b ric a tio n .....................................................
Speedometer A d a p t e r .............................................
Complete M aintenance Schedule........................
Recommended Fluids L u b rican ts.......................
Lubrication D i a g r a m s ............................................
Conventional and Forward Control Models
1/2 Ton G M o d e ls...............................................
ENG INE

Oil and Filter Recom m endations

The letter designation "S E " has been established to
correspond with the requirements o f G M 6136-M. "SE"
engine oils will be better quality and p erform better than
those identified with "S A " through " S D " designations
and are recommended for all light-duty gasoline trucks
regardless of model y ear and previous engine oil quality
recommendations.
O il C h an g e Period
• Use only SE engine oil.
ENGINE OIL PERFORMANCE AND
ENGINE SERVICE CLASSIFICATION SYSTEM
L e tte r
GM S p e c ific a tio n
Designation
N one
SA
None
SB
G M 4745-M
SC
GM 6041 -M
SD
(1 9 6 8 Release)
G M 6136-M
SE
1972
OB-4
OB-4
OB-4
OB-4
OB-5
OB-5
OB-5
OB-5
OB-5
OB-6
OB-6
OB-6
OB-17
OB-18
OB-18
OB-19
A p p lic a b le
M odel Year
None
None
1967 and
P rio r Years
1 970 and
P rio r Years
1977 and
P rio r Years