K 30 1 Ton Pickup 4WD L6-292 4.8L VIN T 1-bbl (1982)
part number 8635909 (one piston and one seal per package). The oil seal is available separately as service part number 8635568.
Important:
The same design accumulator piston and seal are used in both the 1-2 and 3-4 circuits.
Refer to the appropriate Service Manual for removal and installation procedures.