Remove and replace heater core on a 1997 Cadillac Catera

SOURCE: Need to know location of heater control relay in Cadillac Catera

Most likely the K134 multifunction relay. Not a major expense to fix.

SOURCE: need daigram for 1997 cadillac

first ignition plug keeps fouln out. any ideas.

Mike Butler

• 6674 Answers
• Posted on Jan 28, 2009

SOURCE: 2000 Cadillac Escalade. Replace Heater Core

Here you go, Good Luck !! Click on link & scroll down a ways. Any picture will expand if you click on them.

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a5da0

SOURCE: 2001 cadillac catera ebtcm removal how to

You need to remove the upper rad hose and the battery.
Then, use a torx to remove the 6 screws (hard to get at) which will remove the EBTCM from the brake modulator. You also must disconnect the two electrical connectors (the big one has a slide tab).
There are places you can send the module to and rebuild with warranty. I took a module from a 99' and installed it in my wife's 01'. Now the speedo, odometer, cruise and power steering work perfect and no TCM / ABS light.

SOURCE: How to remove and replace a heater core for a 1998

if I remember correctly the engine has to be removed.