C 30 P/U 2WD V8-379 6.2L DSL (1985)
Figure No. 1
SERVICE PROCEDURE
Inspect both engine oil cooler lines for manufacturing date code (reference the 1985 Light Duty Truck Service Manual, ST-330-85, for cooler line
location). Lines marked with a date code of 2654, as shown in Figure No. 1, must be replaced. In addition, replace the cooler line if the date code cannot
be read or if the date code does not appear on the hose section of the line.
Lines with identification numbers other than above are OK and are not to be replaced.
