How much horsepower does a 1987 Sierra Classic have?

The horsepower of a 1987 GMC Sierra Classic varied greatly depending on the engine option. There wasn't a single horsepower rating. To know the horsepower of a specific 1987 Sierra Classic, you need to know which engine it has. Common engines and their approximate horsepower ratings (these can vary slightly depending on specifics) include:

* 4.3L V6: Around 125-130 hp

* 5.0L V8: Around 150-160 hp

* 5.7L V8: Around 180-190 hp

* 6.2L V8 (in heavy-duty models): Around 185-200 hp (or more depending on the specific configuration)

You'll need to check the vehicle's documentation (owner's manual, build sheet, etc.) or look at the engine itself to identify the engine displacement to determine its horsepower.