OHV, 8 Valves, FI, Naturally Aspirated,Gas,WithRoller Cam, Block#311,Head #642& Head Cast #642
| Blk cast | 311 |
|---|---|
| Block | Long Block |
| Cylinder | L4 |
| Eng pn | CH480 |
| Eng type | Auto |
| Liter cid | 2.5 / 151 |
| Model | Astro, LLV (Post Office Vehicles), S-Series Truck |
| Vin | E |
| Yr | 1989, 1990, 1991 |