heater core removal

You can find a free repair manual here: http://bit.ly/autozone_repair_info sign up its free and put in your Chevy info and choose repair guides then put core into the search box and then click on S10 repair guide on the right and on the left is heater core

1995 and above ,Remove the dash and drop the steering column. If you get a Hayes manual, it will take 5 to 6 hours to complete.