The horsepower of a GMC Sierra is 355 hp.
270hp
295hp
Your 2000 GMC Sierra Vortec might be hard to start because the battery or the starter are worn or dead. The GMC Sierra might also be hard to start because of a clogged fuel filter.
5 quarts of 5w-30
It has 255 horsepower bone stock
285 horsepower
310 hp
somewhere around 200hp
315 horsepower stock
250 hp
403