Chevrolet 1980 Light Duty Truck Service Manual page 405

The following information is important in
N O TICE:
preventing engine damage and in providing reliable
engine performance.
When raising or supporting the engine for any
reason, do not use a jack under the oil pan, any sheet
metal or crankshaft pulley. Due to the small clearance
between the oil pan and the oil pump screen, jacking
against the oil pan may cause it to be bent against the
pump screen, resulting in a damaged oil pickup unit.
It should be kept in mind, while working on the
engine, that the 12-volt electrical system is capable of
violent and damaging short circuits. When performing
Engine Identification........................................................................ 6A-1
Diagnosis........................................................................................... 6A-2
4.1 L (D ) L-6 - RPO LE3............................................................ 6A1-1
4.8 L (T) L-6 - RPO L25............................................................. 6A1-1
5.0 L (G ) V-8 - RPO LG 9........................................................... 6A4-1
5.7 L (L) V-8 - RPO LS9............................................................. 6A4-1
5.7 L (M ) V-8 - RPO LT9........................................................... 6A4-1
6.6 L (R ) V-8 - RPO LF4............................................................ 6A4-1
6.6 L (X ) V-8 - RPO LE4............................................................ 6A4-1
7.4 L (W) V-8 - RPO LE8........................................................... 6A5-1
5.7 L (Z) V-8 - RPO L F 9............................................................ 6A6-1
All engines used in 1980 are referred to by their liter
displacement followed by the VIN code letter in parenthesis.
This VIN code can be found on the vehicle by observing the
VIN plate located on the left door striker pillar. The third
character in the VIN code identifies the engine (fig. 6A-1).
SEC TIO N 6A
ENGINE MECHANICAL
C O N TEN TS
ENGINE IDENTIFICATION
ENGINE M EC H A N IC A L
any work where electrical terminals could possibly be
grounded, the ground cable of the battery should be
disconnected at the battery.
Any time the carburetor or air cleaner is removed,
the intake opening should be covered. This will protect
against accidental entrance of foreign material which
could follow the intake passage into the cylinder and
cause extensive damage when the engine is started.
T H I R D C H A R A C T E R IS
E N G I N E CODE
♦
C C D 1 4 A 1 1 0 0 0 0 1
CARB
CODE RPO TYPE
BARRELS
D LE3 L6 2
T L25 L6 1
LG9 V8 2
G
V8 4
L LS9
LT9 V8 4
M
P LF5 V8 2
R LF4 V8 4
4
LE4 V8
X
W LE8 V8 4
z LF9 V8 F.I.*
Diesel
* Fuel Injected
Fig. 6A-1~Engine Codes
6A-1
DISPLACEMENT
SECTION
LITRE/CU. IN.
6A1
4.1/250
6A1
4.8/292
6A4
5.0/305
6A4
5.7/350
6A4
5.7/350
6A4
5.7/350
6A4
6.6/400
6.6/400 6A4
7.4/454
6A5
5.7/350 6A6
LIG H T T R U CK SER V ICE M ANUAL