Question about 2004 Pontiac Bonneville
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Posted on Jan 02, 2017
SOURCE: how to replace heater core
It's a good idea to disconnect the battery to prevent any electrical issues during the job. You could drain some of the coolant to try & minimize the amount of spillage but unless you pump the fluid out of the hoses, you will spill some.
Remove the hoses from the heater core on the firewall side. There are several things you will need to remove under the dash & around the glove box area that you will see need to be removed (electrical & any padding/insulation/trim that obstructs the core cover, but you can eventually remove the heater core from the dash without actually removing the entire dash or a/c & heater assembly. Once you get access to the front of the heater assembly, remove the screws that hold on the heater core cover, remove the cover and you'll see the end of the heater core which can be removed & replaced. Generally, a gentle nudge from the firewall side where you removed the hoses will help. Then reassemble & hopefully you'll have heat & no leak. I suggest that in cold weather, you dip the hose ends into hot water prior to attempting to put them over the new heater core ends, this will only aid in the installation & prevent damaging the ends.
You may want to look at the new part before you start to identify just how it fits in the heater unit, based on the hoses from the firewall side that you can see & it will give you a good idea of how this all works. good luck
Posted on Jan 29, 2010
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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