There's no possible way an S-10 pickup weighs 2500lbs! (We won't even bring up the Blazer)
Heck even the base model, no options, 4 cylinder weighs nearly 3100lbs.
Add 200lbs more for extended cab
You are looking at around 3500lbs for a loaded V6 2WD standard cab.
4WD versions are near 4000lbs. (all extended cab)
Crew Cab 4WD's around 4100lbs.
The 4.3L V6 makes 180HP/245TQ in 2WD models
190HP/250TQ in 4WD models
(pretty sad for such a large engine IMO)