heater core - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-05-2006, 12:37 PM   #1
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my 92 ssei has a bad heater core

how hard is it to change?
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Old 03-05-2006, 03:44 PM   #2
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Book says you pretty much
Disconnect the hoses
Remove glove box
Remove lower hush panel
Remove hvac programmer
Remove core box
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Old 03-05-2006, 09:36 PM   #3
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Bill, would that apply to a '99 as well?

Also, has anyone just paid the dealer to do it, and if so, what'd it cost?

thanks.
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Old 03-05-2006, 10:47 PM   #4
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That was from the 1998 manual
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Old 03-05-2006, 10:52 PM   #5
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Quote:
Originally Posted by BillBoost37
That was from the 1998 manual
Hmmm. That'* not so bad. Maybe I'll invest in the clamp tool after all. Core itself is about $60 at the parts puppies.

Those hoses look molded to me, not plain old heater hose off the roll. Anybody know?
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Old 03-05-2006, 11:07 PM   #6
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They do look like molded hoses. I would say they are. A good slip joint plyer should remove the clamps or you could just break off the plastic neck from the core,
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Old 03-06-2006, 09:02 AM   #7
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They are molded and specifically upper and lower labeled. When pulling them out...label which end was at the engine. Trust me

The spring hose clamp tool...while you've done 100 jobs w/o it.. you will fall in love with this tool on this job.
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Old 03-06-2006, 09:44 AM   #8
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These pictures show the heater core in the car and its location. Scroll down through the posts.

Of course, it'* not quite as easy to get to with the dash in place, but I've done worse jobs. I've been under there to replace the programmer.

http://www.bonnevilleclub.com/forum/...ic.php?t=38558

The programmer screws to two of the plastic studs sticking out on the curved corner piece over the heater core then you're ready to take the cover off.
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Old 03-06-2006, 09:50 AM   #9
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Quote:
Originally Posted by Bob Dillon
Also, has anyone just paid the dealer to do it, and if so, what'd it cost?
I had to have the heater core in my 99 replaced two years ago. Had 78,000 miles.

I wasn't about to rip into the dash so I paid a rebutable shop to do it. Cost $275 including parts for them to replace it.
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Old 03-06-2006, 12:07 PM   #10
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Yeah..that pic is Randy'* 97 donor car in the Franken project.

Book doesn't seem to say the dash needs to go anywhere.
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