GMC 1982 Light Duty Truck Service Manual page 427

Chevrolet Light Duty Trucks use either Chevrolet or Dana produced rear axle assemblies. See examples of production codes
below.
CHEVROLET AXLE
EXAMPLE:
RAC
Axle & Vehicle Code
Code is staped on top of right axle tube outboard of carrier.
DANA AXLE
EXAMPLE
603560-1
D A N A ' MONTH
P/N CODE
Code is stamped on rear surface of right axle tube.
The Chevrolet produced axles use a prefix code stamped into the axle tube for axle ratio identification. Dana produced
axles use the same prefix code as the Chevrolet axles but they display these codes on a strip of tape attached to the outboard
end of the axle tube.
L I G H T D U T Y T R U C K R E A R A X L E I D E N T I F I C A T I O N
001
Day Code
Jan. 1 = 001
29
T
DAY
CODE
G
Source Code
Buffalo
C
G Gear & Axle
K GM of Canada
W Warren
0 B
T T
MODEL SHIFT
YEAR CODE
R EAR A X LE 4 B -1 3
1
■X
Shift Code
1st Shift
4
T
PRODUCTION
LINE CODE
IO I9 & > 5