Question about 2004 Pontiac Grand Prix
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
You have to take out the whole dash board. the location of the unit is behind the radio near the windshield
Posted on Oct 12, 2009
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Posted on Jan 02, 2017
If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Posted on Jan 11, 2011
you are going to need a manual with a diagram.because you going have to remove parts under the hood.you going have to remove floor console.and lower instrument panel insulator. on both sides.
Posted on Jul 15, 2009
Need more info.
Where is your hang up? If I remember correctly the Jeep dash pad (all of the plastic) comes off first then if you need more access, the metal structure of the dash comes out. Make sure you un-bolt and un-plug the Passenger Air Bag because that comes with the dash pad. DISCONNECT THE BATTERY while the air bag is disconnected and make sure your body is grounded while you un-plug and plug in the air bag!!!
Posted on Apr 20, 2009
almost all heater cores are located under the dashboard, just above the passenger's feet, encased in a black plastic box. It ain't easy to take the dash apart and change it. I would first make sure it is not under the GM warranty as 5 years is too short a life for the core. If it is out of warranty then I would get a new core at a parts store and pay an auto heating and air conditioning repair shop to put it in. That way you beat the high dealer parts and labor price.
Posted on Oct 07, 2010
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