I believe it is 260 horsepower.
The horsepower of a GMC Sierra is 355 hp.
vortec 454,1996 thru 1999-->>>290HP 410TQ
It has 255 horsepower bone stock
Every vehicle has a different type of horsepower depending on the specifications of the vehicle. The 1999 Tahoe Z71 350 Vortec Engine has a horsepower of 255 at 4600 RPMs.
397 hp
About 190 H.P.
215@2800. Rpm
Between 370 and 390
197 rwh stock
Type your answer here... 255 horsepower and 335 lbs of torque
The 8.1L vortec comes stock with 330 hp and about 450 pound feet of torque.