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6 Cyl, 250 cid (4.1L, VIN D, 8th digit)
- ECM
- Without ECM
6 Cyl, 292 cid (4.8L, VIN T, 8th digit)
8 Cyl, 305 cid (5.0L)
- California (VIN F, 8th digit)
- Federal (VIN H, 8th digit)
8 Cyl, 350 cid (5.7L)
- VIN K (8th digit, liquified petroleum gas)
- VIN L (8th digit)
  - California
  - Federal
- VIN M (8th digit)
8 Cyl, 379 cid (6.2L, diesel)
- Automatic Transmission
  - EGR (VIN C, 8th digit)
  - Without EGR
    - (VIN J, 8th digit)
- Manual Transmission
  - EGR (VIN C, 8th digit)
  - Without EGR
    - (VIN J, 8th digit)
8 Cyl, 454 cid (7.4L, VIN W, 8th digit)

Engine Assembly for 1984 GMC C25/C2500 Pickup

Fits: 6 Cyl, 250 cid 4.1L, VIN D, 8th digit ECM (change)

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