1997 And UP GM 5.0 & 5.7 (300+ HP) Vortec engines, left hand rotation. There were a few Vortec engines used in 1996, the intake manifold bolts will go straight down and the non vortec have the bolts at an angle.
Without Sensor Hole. 2002 Up PCM needs the timing cover with the crank shaft position sensor (R004010A). Can be used to replace the Indmar covers that have a sensor but nothing connected to it thru 2005.