There are 36 choices

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SUBURBAN 10
- 6 Cyl, 250 cid (4.1L)
  - integral intake manifold
  - Without integral intake manifold
- 8 Cyl, 305 cid (5.0L)
- 8 Cyl, 350 cid (5.7L)
  - EGR
  - Without EGR
- 8 Cyl, 400 cid (6.6L)
  - EGR
  - Without EGR
- 8 Cyl, 454 cid (7.4L)
  - EGR (VIN S, 3rd digit)
  - Without EGR
SUBURBAN 1500
- 6 Cyl, 250 cid (4.1L)
  - integral intake manifold
  - Without integral intake manifold
- 8 Cyl, 305 cid (5.0L)
- 8 Cyl, 350 cid (5.7L)
  - EGR
  - Without EGR
- 8 Cyl, 400 cid (6.6L)
  - EGR
  - Without EGR
- 8 Cyl, 454 cid (7.4L)
  - EGR (VIN S, 3rd digit)
  - Without EGR
SUBURBAN 20
- 6 Cyl, 250 cid (4.1L)
  - integral intake manifold
  - Without integral intake manifold
- 8 Cyl, 305 cid (5.0L)
- 8 Cyl, 350 cid (5.7L)
  - EGR
  - Without EGR
- 8 Cyl, 400 cid (6.6L)
  - EGR
  - Without EGR
- 8 Cyl, 454 cid (7.4L)
  - EGR (VIN S, 3rd digit)
  - Without EGR
SUBURBAN 2500
- 6 Cyl, 250 cid (4.1L)
  - integral intake manifold
  - Without integral intake manifold
- 8 Cyl, 305 cid (5.0L)
- 8 Cyl, 350 cid (5.7L)
  - EGR
  - Without EGR
- 8 Cyl, 400 cid (6.6L)
  - EGR
  - Without EGR
- 8 Cyl, 454 cid (7.4L)
  - EGR (VIN S, 3rd digit)
  - Without EGR

Engine Assembly for 1978 GMC Suburban

Fits: SUBURBAN 20 8 Cyl, 454 cid 7.4L EGR VIN S, 3rd digit (change)

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