Here are the most common horsepower ratings:
* With a 4L80E automatic transmission: 290 horsepower
* With a 4L80E automatic transmission and a heavy-duty package: 300 horsepower
It's important to note that these are just general estimates. To determine the exact horsepower of your specific 1994 Chevrolet Silverado 454SS, you should consult the vehicle's Vehicle Identification Number (VIN) or the owner's manual. You can also find more detailed information on online resources like Chevrolet's website or automotive forums.