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Gary, GMC Technician
Category: GM
Satisfied Customers: 17146
Experience:  15 years gm master tech/15 years ASE master tech
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89 chevy k2500 needs a ac evap core. the instructions I have

Customer Question

JA: Hello. What seems to be the problem?
Customer: 89 chevy k2500 needs a ac evap core. the instructions I have up appear simple but I can not get to any back bolts if there are any to get the bottom off. can this be replaced without removing the dash or heater box assembly?
JA: How many miles are on the car? Have any warning codes popped up?
Customer: has nothing to do with question? 150k and no
JA: What year is your K900?
Customer: 89
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: to remove bottom per found instructions
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the GM Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: GM
Expert:  Gary replied 1 year ago.

this here is how to change the evap core on this truck

you do not need to remove the dash or the heater box it is a matter of removing # ***** in this picture to remove the evap core

  1. Battery ground cable.
  2. Coolant from the radiator.
  3. Refrigerant from the system.
  4. Coolant overflow tank.
  5. Heater hoses from the coil tubes (47).
  6. Refrigerant inlet (45) and discharge (46) lines from the evaporator.
  7. Electrical connection to the temperature actuator.
  8. Seven screws that hold the heater case bottom cover (67) and remove cover.
  9. Screws and brackets that hold the heater core to the case and remove core.
  10. Four screws that hold the evaporator core cover (68) and remove cover.
  11. Pull the core out and down from the evaporator case.

you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

Customer: replied 1 year ago.
no picture attached I can find
Expert:  Gary replied 1 year ago.

im am sorry here it is now

Customer: replied 1 year ago.
sorry still does not help. I found 5 of the 7 screws on the bottom but can not find last 2 and if they are on back side next to fire wall there is no room to get to them. where are the other screws? found 2 on left bottom, one on side front, 1 on right and one in a hole next to drain and fire wall. bottom is still attached at back.