Question about 1998 Pontiac Bonneville

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Replace heater core in a 1998 pontiac bonneville

How to replace heater core

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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leirob007
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SOURCE: 1997 bonneville ssei

Grab yourself a cable type hose clamp tool.. a long pair of hose removal pliers. drain the radiator and remove the hose clamps and hosed from the passenger side firewall ( hidden behind the A/c acumulator ).
from the passenger side remove the end cap from the heater box under the dash. take it out and put it back together in the reverse order.

Posted on Nov 16, 2008

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SOURCE: Pontiac Fiero Heater Core

no its actually really easy i just did it about 3 weeks ago. right under the dash on the passenger side the is a black box unscrew the cover on the side of it and the heater core is right there then you have to  disconnect the hoses under the hood which might be the hardest part after that unbolt the straps holding the heater core on. I keep the straps on till i get the hoses off because then the heater core don't move when you are trying to get the hoses off. Then all you have to do is put it back together.

Posted on Nov 23, 2008

johnsmith992
  • 37 Answers

SOURCE: Replace heater core in Pontiac Grand Am GT 3.4l

ram a sharp chissel or pointed head centre punch through the core and prise it out .,than tap the new one in place ,,,there u go bobs ure uncle

Posted on Jan 29, 2009

abauto
  • 353 Answers

SOURCE: ac/heater blower relay

Center Rear Of Engine Compartment, At Cowl

Posted on Jul 25, 2009

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SOURCE: How do replace heater core in 2002 Pontiac Gran Prix

i do believe you have to take the passengers side dash apart behind the glove compartment. go to autozone and get a manual or go to the library and check the chiltons manual. this is not an easy job. how bad is the leak? if its not bad these heater cores are made of all aluminum. i would buy a bottle of that radiator additive and see if that takes care of the problem first. it only cost about 5 bucks a bottle and it may permanantly fix your problem.

Posted on Aug 13, 2009

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Jan 19, 2016 | Pontiac Cars & Trucks

1 Answer

Heater core leaking


Must replace the heater core. Its usually a very hard job that requires disassembly of the dash. If you insist on doing the job yourself, I suggest getting a repair manual from your local auto parts store so you can use it as a reference as you work. Here is a link to a video on a 98, yours will be very similar: http://www.youtube.com/results?search_query=1991+Pontiac+Bonneville+heater+core+replacement&sm=12

Dec 09, 2013 | 1991 Pontiac Bonneville

1 Answer

Heater core


Remove the dash, remove all fasteners and seperate the heater core housing, remove the core. Install in reverse order. Its a tough job for a novice, i suggest let a shop do it.

Dec 06, 2013 | 1993 Pontiac Bonneville

1 Answer

Why wont the heater blow out hot air in my 1995 pontiac bonneville. it will only blow cool air


If the heater hoses are getting hot, the problem may be a faulty blend door under the dash. The blend doors direct air thru the heater core and the vents.

Oct 12, 2012 | 1995 Pontiac Bonneville

1 Answer

How to replace the heater core


its a tough job because it is located behind the dashboard in the car so the dash and and everything blocking the heater core will have to come out once you get to it its an easy replacement

Nov 18, 2011 | 1995 Pontiac Bonneville

1 Answer

I have a 94 bonneville..it blows luke warm air..radiator is full..new thermostat..and there is a lil antifreeze by the heater core..like its drippin..


Check all your fittings and connections around the heater core. If those are good, time to replace the heater core.

Jan 20, 2011 | 1994 Pontiac Bonneville

1 Answer

I need to install a heater core for a 2001 Pontiac bonneville I need instructions on how to remove and install it.


prev.gif next.gif HEATER CORE REMOVAL AND INSTALLATION 1997–01 Models BONNEVILLE AND LESABRE
  1. Disconnect the negative battery cable.
  2. Drain the cooling system into a clean container for reuse.
  3. Remove or disconnect the following:
    • Heater hoses from the heater core
    • Right sound insulator
    • All necessary electrical connectors and remove the instrument panel compartment
    • Temperature valve actuator
    • Electrical connector and remove the HVAC programmer
    • Heater core cover-to-heater assembly screws and the cover
    • Heater core-to-heater assembly screws and the heater core Fig. 1: View of the heater hoses and clamp positions — 1997–01 Bonneville and LeSabre 93111g71.gif
      Fig. 2: View of the heater core cover — 1997–01 Bonneville and LeSabre 93111g72.gif
    To install:
  4. Install or connect the following:
    • Heater core and the heater core-to-heater assembly screws, then, tighten the screws to 12 inch lbs. (1.4 Nm)
    • Heater core cover and the cover-to-heater assembly screws, then, tighten the screws to 12 inch lbs. (1.4 Nm)
    • HVAC programmer and connect the electrical connector
    • Temperature valve actuator
    • Instrument panel compartment and connect any necessary electrical connectors
    • Right sound insulator
    • Heater hoses to the heater core
  5. Refill the cooling system.
  6. Connect the negative battery cable.
  7. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

Jul 01, 2010 | 2001 Pontiac Bonneville

2 Answers

My heat or my air doesn't work in my 1995 Pontiac Bonneville but it blows good. What could be the issue?


my 2004 pontaic bonneville the heater hoses going into and out from the heater core are hot , but the heater blow cold air. ,

Oct 16, 2009 | Pontiac Bonneville Cars & Trucks

1 Answer

Heater blows sometimes but not others


cheap resolution try adding anti-freeze.

costly solution may be a bad heater core.

Jan 18, 2009 | 1998 Pontiac Bonneville

2 Answers

Water leak


sounds like heater core is it wet in the front on the floor under dash check out or the heater valve could be leaking also

Jan 01, 2009 | 1998 Pontiac Bonneville

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