Here's why:
* Different Trim Levels: The 1988 Silverado came in various trim levels like the C10, C1500, and C2500. The horsepower output could differ slightly depending on the trim.
* Engine Options: Even within the same trim level, the 454 engine might have been offered in different configurations, each with varying horsepower.
* Emissions Standards: Emission regulations could also influence the horsepower rating for different years and models.
To get the exact horsepower for your 1988 Silverado with a 454, you'd need to:
1. Identify your specific Silverado model: Check the VIN plate for the model designation (C10, C1500, C2500, etc.)
2. Locate the engine code: You might find this on a sticker near the engine bay or in the owner's manual.
3. Consult factory service manuals or online resources: Once you know the model and engine code, search for those specifications online or in Chevrolet service manuals.
General Estimate: Most 1988 Silverados with 454 fuel-injected engines were in the range of 230-245 horsepower.
Remember: This is a rough estimate. The best way to know the exact horsepower of your truck is to find the specific information for your model and engine code.
