Question about 1997 GMC Sierra
I need to replace the evaporator core in my 97 gmc truck 1500. Can you supply me with the procedure as well as diagrams to get this job done. I have all the connections in the engine compartment disconnected but need help with the under dash anchor points.
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Posted on Jan 02, 2017
SOURCE: I have a 1992 olds
in my experience finding specific directions on how to do that are nearly impossible to find due to the strict EPA regulations on the use of refrigerant. but when i replaced the evaporator core on my tahoe i found it helpful to go on to youtube and search how to remove the dash. once the dash is out disconect the lines going to the evaporator core and the heater core from the engine side of the firewall. from inside the vehicle remove all screws securing the heater box to the firewall. you have to search for one or two hidden screws. looking from the engine side may make them visible. the heater box should pull out easily if not you missed a screw. once out of the vechicle remove all screws hold the box halves together, mine had about fifteen going all the way around it. open it up remove the evaporator core, clean any dirt, leaves etc. out of the box. replace core and reinstall. honestly not a very difficult job, but it is time consuming. hope this helps.
Posted on Apr 08, 2011
Did you replace the schrader valves (the thing in the inside of the A/C service fittings, you need a special tool to remove and install them) before you recharged the system? They are notorious for leaking if they are old.
If you did not, replace those and try again, if it leaks out again with no evidence you most likely have a bad evap core.
And yes, it's a pain in the ****, plan on it taking a 30 pack of bud light and a weekend to do, or one day and a 12 pack if you are good. Just start taking the dash apart, and may the force be with you. It will be behind the glove box
Posted on Jul 29, 2008
SOURCE: I have a 1997 GMC
Operation: The evaporator is responsible for supplying the area for the refrigerant to expand and turn cold. Advice: Before the evaporator can be removed, the old refrigerant must be drawn out by certified professionals using specialized equipment. Check with your repair shop for prices on evacuating the old refrigerant before you make the repairs and then drawing the system down to a vacuum and refilling with refrigerant after your repairs have been made. Because of it's location under the dash replacing the evaporator is probably one of the more difficult AC system jobs,I would reconmend taking to a repair shop.
Posted on Jul 05, 2011
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