How you change the evaporator on your Chevy Express?

To change the evaporator on a Chevy Express, first, disconnect the battery and remove the dashboard to access the HVAC system. Then, drain the refrigerant from the A/C system and disconnect the necessary hoses and electrical connectors from the evaporator. Remove the bolts securing the evaporator case, take out the old evaporator, and install the new one. Finally, reassemble everything, recharge the A/C system, and test for leaks.