need tips on heater core

Any tips on putting in a new heater core for a 91 S-10 Blazer?

I don't know exactly what you are needing tips with but the most important thing that I have learned is to test the new heater core before putting the dashboard back together. This should be a straight forward job.

Drain the antifreeze;
Disconnect the heater hoses;
Gain access to the heater core from inside the truck (behind the glove box)

What are you need ing help with?