Question about 2006 Pontiac Grand Prix
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Posted on Jan 02, 2017
The entire dash does not need to be removed.
Disconnect the heater inlet and outlet hoses which enter the firewall directly under the 'hard lines' for the AC'. near the center/driver side of the fire wall. Note: A cable operated clamp removal tool helps access. They sell them at Autozone in the 'OEM' tool section)
Remove the lower kick panels on both sides.
Remove the seats and console and carpet (to access and remove the duct which goes from the bottom of the heater core outlet cover to the back seat area)
Remove the outer heater core cover.
(Note: First time through the outer heater core cover is held on only by heat stakes, no screws. You need to break the head of each of these heat stakes (look like donuts) to remove the case.
Remove the inner heater core cover (also heat stakes).
Remove the heater core.
Installation is reverse of removal.
You'll need to drill the marked dimples next to each of the now broken heat stakes. Drill 5.5mm holes in cover in these areas and replace cover with screws which should be available from GM dealer.
Posted on May 08, 2011
best thing you can do is go to library . they will loan repair book's . or buy one . you are missing bolts some place , or somthing .
Posted on May 25, 2009
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
Sounds like the temperature blend door actuator may be bad or the vacuum hose to it is disconnected.
Poor Heater System Performance CAUTION
Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
Posted on Nov 19, 2010
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