How much horse power is a Chevy van express with 5.3l motor?

The horsepower of a Chevy Express van with a 5.3L engine varies depending on the year of manufacture. There's no single answer. The horsepower rating changed slightly over the years the 5.3L engine was offered in the Express. You'll need to specify the year of the van to get a precise answer. You can usually find this information on a sticker inside the driver's side doorjamb or in the owner's manual.