1. VIN Method:
- Locate the VIN on the vehicle. It is typically found in various locations, such as on the driver's side door jamb, under the hood, or on the dashboard.
- The 10th character of the VIN represents the model year. In this case, it should be "H" for the 1988 model year.
- Additionally, the 8th character of the VIN indicates the engine type. This varies based on the specific engine installed. You may need to consult a VIN decoding chart to identify the exact engine corresponding to the 8th character.
2. Engine Block Casting Number:
- Open the hood of the truck and locate the engine block.
- The casting number is usually stamped or engraved on the engine block. It may be near the front or side of the engine.
- The casting number consists of a series of numbers and letters that identify the engine's specifications and characteristics.
- You can cross-reference the casting number with information from technical manuals or online resources to identify the specific engine type in your 1988 GMC truck.
Please note that different GMC truck models may have various engine options, so the specific engine type may depend on the particular model you have. If you have additional questions or need further assistance, don't hesitate to ask.
