How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask ase_master327 Your Own Question
ase_master327, Shop Owner
Category: Chevy
Satisfied Customers: 5288
Experience:  +15 years experience with Chevrolet. Bumper to bumper diagnosis & repair.
Type Your Chevy Question Here...
ase_master327 is online now
A new question is answered every 9 seconds

87 chevy suburban: heater core..under dash..the fire wall cant figure

This answer was rated:

how do u change a heater core in 87 chev suburban the duct box where the core seems to be under dash has steel rivets to the the fire wall cant figure out how to get it off

Here is a blowup pic of the situation, and instructions for the job.




  1. Battery ground cable.
  2. Drain the radiator.
  3. Heater hoses from the core tubes (148).
    • Plug the core tubes to prevent spillage.
  1. Instrument panel compartment and door.
  2. Center duct to the selector duct (200).
  3. Center lower and center upper ducts.
  4. Temperature door cable.
  5. Nuts from the three selector duct studs that project into the dash panel.
  6. Selector duct to dash panel screw (inside the vehicle).
  7. Selector duct assembly.
    • Pull rearward until the core tubes clear the dash panel.
    • Lower the selector assembly to reach the vacuum and electrical harness.
  1. Vacuum and electrical harness.
  2. Selector duct assembly.
  3. Core mounting strap screws.
  4. Core.


  1. Core.
  2. Core mounting strap screws.
  3. Selector duct assembly.
  4. Vacuum and electrical harnesses.
  5. Selector duct assembly.
  6. Temperature door cable.
  7. Center lower and center upper ducts.
  8. Center duct to selector duct.
  9. Instrument panel bar and door.
  10. Heater hoses.
  11. Coolant to the radiator.
  12. Battery ground cable.


  • Temperature door cable.
ase_master327 and 5 other Chevy Specialists are ready to help you