I have replaced mine and its under the dash in the center. You'll have to remove several panels to get to it. Be careful with the attached hoses. They are preformed and not available in original configuration. The replacement hoses are way thicker and harder to deal with. Also the hose ends that come from the core are plastic so you cant wrench a hose clamp down on them. The originals are ribbed to just pop on and are tight fitting which the replacements are not. I went to the hardware store and bought some small copper tubing and cut short pieces to fit between and inside of the hose attach points so I could get a pair of skinny hose clamps on them. The heater core is very small and easily damaged. Good luck!( 94 pont sunbird LE 2,0)
I would suggest replacing it.
where is the heater core at
Passenger side, near the firewall inside the car.
under the dash right hand side.
Usually at the firewall either passenger side or middle follow the heater hoses
The water pump pushes the coolant through the engine block and head(s) then into the heater core.
It is cheaper to replace the heater core than it is repair it
heater core has a leak replace heater core
You can replace the sheer core, on your 2004 Pontiac Grand Prix, by removing the water lines. Remove the four bolts that hold the heater core in place. Reverse the process to install the new heater core.
remove the entire dashboard.
I would like to have a dimgram to show me how to put the hater core out and in on my 94 Pontiac Bonneville
The heater core is located in the middle of the dash behind the center console. You have to take the console out to see the heater core.