Question about 2004 Chevrolet TrailBlazer

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Rear heat not working

I have a round knob on center shift counsel that says r,0,1,2,3,fan. I can not get the rear heater to go on and I checked all the fuses. Is there something else that needs to work like a relay or something that turns the power on to rear heat

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  • strick359 Dec 08, 2008

    I am having the exact same problem out of my 03 EXT

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1 Answer

Yeah... turn the front heat on.

Posted on Nov 04, 2008

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Kia Sedona- center and third row heating vents blowing cold air


There is a separate button on the lower dash labeled RR HTR for the rear heater. If you do not engage the switch it will blow cold air.
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Need diagram for replacing heater core



    Detach the heater core hoses at the firewall. The two black hoses attach near the firewall on the passenger's side of the engine compartment. Squeeze the hose clamps on the end of the hoses with pliers and slide the hoses from the heater core tubes.

    • 4Remove the lower passenger's-side and driver's-side dashboard panels. The two panels are held in with push-pins. Raise the center of the push-pins with a small, standard screwdriver and pull the pins from the panels. Pull the panels away from the dashboard to separate them from the dashboard.
    • 5Remove the center console. Separate the gear select trim piece from the center console, using a small standard screwdriver to pry the trim piece from the center console. Lift it over the shift knob and rotate it to clear the knob. Remove the retaining screws holding the center console in place with a Phillips screwdriver. Lift the console up over the shift knob and remove it from the interior.
    • 6Remove the glove box. Open the door to the glove box. Squeeze the two retaining tabs on the ends of the glove box and pull the glove box away from the dashboard. Remove it from the interior.
    • 7Detach the drain tube from the heater core cover, which is located behind the glove box. The tube can be pulled from the heater core cover by hand. Detach the air intake duct from the bottom of the heater core cover. The air intake duct runs from the bottom of the cover to the center of the dashboard. Remove the duct by hand.
    • 8Remove the retaining screws on the black heater core cover with a Phillips screwdriver. Pull the cover from the heater core and remove it from the interior. Remove the heater core clamp screw with a Phillips screwdriver, pull the clamp away from the heater core, then pull the heater core from the housing.
    • 9Place the replacement heater core against the housing. Place the clamp over the heater core and install the clamp retaining screw with a Phillips screwdriver. Position the heater core cover over the heater core and install the retaining screws with a Phillips screwdriver.
    • 10Attach the drain tube and the air intake duct to the heater core cover.
    • 11Install the glove box. Squeeze the retaining tabs on the sides of the glove box and push it into position against the dashboard. Release the tabs when the glove box is in position.
    • 12Install the center console. Guide the console over the shift knob and install the retaining screws with a Phillips screwdriver. Slip the shift selector trim piece over the shift knob and push it into the center console.
    • 13Place the lower passenger's-side and driver's-side dashboard panel in position. Install the push-pins into the retaining holes, pushing the in center of the pin to engage the pins.
    • 14Fill the radiator with coolant. Most climates require a 50/50 mix of DEXCOOL coolant and water. 2.2L engines require 8.6 qts., 2.4L

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How do i change the heater core


Actually extremely easy as it comes to modern day heater cores. Auto shops will tell you it calls for over 7 hours of labor and will cost you hundreds read on and i will show you how to do it yourself if you are at least slightly vehicle savvy.

First and foremost drain your engine coolant, raise the vehicle and support on jackstands. disconnect both heater hoses from the heater core (between the rear of transmission and subframe) and the 2 10mm bolts that both through to the heater box inside. this is all that is required under the car. Next go back inside the car and remove both left and right sound insulators (black covers under your feet) and remove the center counsel where the shifter is. you will find 4 bolts in the center counsel as well as a horseshoe clip that must be removed to lift the shifter off with the console. next you will find 2 7mm bolts holding the floor heat vent to the heater core cover remove them and the floor vent. Then there are several 5.5mm bolts holding the heater core cover to the air box. remove all gold 5.5 mm bolts and you should be able to pry down on the box and jiggle it a little and WHALAA there is your heater core! Next there are 2 straps holding the core that are also 5.5 mm bolts remove those and the core it does take a little wiggling around but comes out fairly easy. this job litteraly would take even a novice at most probably 2 hours maybe 3. Hope this helps you all !


Read more: http://wiki.answers.com/Q/How_to_change_a_heater_core_on_a_1998_Grand_am#ixzz26pk18WFt

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My 2002 Chevy Blazer wont go out of park


first check to see if the brake lights are working. If they are you will need to pull the center counsel and repair the broken wires fro the shift interlock.

If the brake lights are not working. check the fuse and the switch. The switch will be under the drivers side of the dash mounted on a bracket near the brake pedal lever. The fuse will be in one of the fuse blocks and labeled BRAKE or STOP.

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1 Answer

My 2002 chevy blazer is stuck in park


first check to see if the brake lights are working. If they are you will need to pull the center counsel and repair the broken wires fro the shift interlock.

If the brake lights are not working. check the fuse and the switch. The switch will be under the drivers side of the dash mounted on a bracket near the brake pedal lever. The fuse will be in one of the fuse blocks and labeled BRAKE or STOP.

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1 Answer

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When you say your heater, do you mean the fan does not blow. or no heat fan blows fine. If it does not blow. The fan is located in the passenger side footwell, Turn fan to high and wack it a couple of times on center of cicular lookin thing, easily replaced by removal of screws around outside. If the fan works fine and it blows cold air make sure temperature adjustment knob is workin fine, you should hear it change when adjusting. One other thing, if someone just flushed your radiator or anything similir to do with coolant, check for a air bubble in the system, purge air out of heater core lines with a garden hose.
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