Here's why you can't find this information easily:
* Engine Serial Numbers are Vehicle Specific: Each engine serial number is unique to a particular engine, and not easily searchable for model identification.
* No Central Database: There isn't a single database that manufacturers maintain to link all engine serial numbers to specific models.
How to Find Engine Information for your 1983 GMC Vandura:
1. Check the Engine Compartment: Look for a metal tag or sticker on the engine block or surrounding area. This may have the engine size and model code.
2. Vehicle Identification Number (VIN): The VIN, usually found on the driver's side dashboard, can be used to look up the engine specifications through a VIN decoder service or with a local mechanic.
3. Consult Service Manuals: Specific service manuals for your 1983 GMC Vandura will have engine information and possible engine codes. You can find these online or at an auto parts store.
4. Contact a Mechanic: A qualified mechanic will be able to identify the engine based on visual inspection and potentially running the vehicle's diagnostic system.
Please keep in mind that the engine in your 1983 GMC Vandura could have been replaced over the years, so it's important to verify the information you find.