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1989 gmc s15 classic

I just had my heater core replaced and when i got the truck back the radio does not work. Also when i close my door my interior light stays on.

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Take it back

Posted on Jan 22, 2013


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2005 gmc savanna van...cooling system will not blow hot heat. water pump,heater core,radaitor and thrmostate replaced. is there any electrical problems/

don't know this van specifically, but some things to check, make sure cabin filter is replaced or clean, you didn't say if the blower itself works, if not, correct or replace. Check the hoses going to the heater core, if hot water is flowing thru the core, both hoses should be hot. Check the heater controls to make sure doors in the system are opening closing as they should, you may just be drawing in cold air and not going thru the heater core.

Feb 11, 2015 | 2005 GMC Savana

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I can't get heat in the cab, 2000 GMC Jimmy S15

well either your heater core lines are clogged ore the heater core is just bad

Jan 30, 2013 | 2000 GMC Jimmy

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1989 gmc s15 radio

Your problem is that you have GM vehicle made in the 80s! Go buy a newer Tacoma or Frontier.

Jan 22, 2013 | GMC Sierra Cars & Trucks

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Wireing problem

Check the ground wire that comes off the negative terminal that hooks to the core support right by the front headlight and battery. mine did something similar

Nov 28, 2012 | 1985 GMC S-15

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Heater blows but no heat

check for a bad blend door or actuator in heater. if bad it will not direct the heat were its called for. good-day !

Aug 24, 2011 | 1997 GMC Jimmy

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Heater core replacement 88 s15

This is never an easy job and that is why the labor charges are high for this repair. I know of no place you can get detailed instructions on how to get to the core. You basically remove enough of the dash surround to gain access to the core. Just go slow, take photos or video if necessary to remember how everything fits back in place. If you will search YouTube with the term "heater core replacement 1988 S-15" you may get some help.

May 23, 2011 | 1988 GMC S-15

1 Answer

1998 Jimmy with electrical controls for temperature. Replaced Themostat, Flushed heater core, replaced damaged vacuum lines. Vehicle produces heat to heater core but only luke warm interior temp. Rotated...

Suggestion: see if the blend door opens or closes completely to allow all air through the heater core. To see the blend door moving, remove the panel that says "Cut here for service" under the hood along the firewall. I have a 99 Bravada where the blend door keeps moving back and forth constantly. Changed the blend door actuator but still keeps moving. The air inside is only warm since the door keeps allowing bypassed air through.

Jan 04, 2011 | 1998 GMC Jimmy

1 Answer

Heater core was replaced in my 1989 Oldsmobile and now the radio doesn't work right

You did not say what the exact problem was with the radio, but keep in mind the radio was probably removed to change out the heater core. If it is powering up but will not pick up any signal the antenna wire is probably not connected on the back of the radio. It just plugs in. Same problem could be if it does not come on. A plug in.

Jul 11, 2009 | 1989 Oldsmobile Delta 88

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1999 Ford Windstar 3.8 no heat

If you have a knock or clicking noise behind the radio, it is the blend motor. The blend door is spring loaded and the gears in the blend motor are "stripped". The door is spring loaded so that the door is closed to the heater core. About 2 hours to replace and a lot of bending and stretching. You don't have to remove the dash, but all of the trim, radio, and controls will need to come out.

Nov 12, 2008 | 1999 Ford Windstar

1 Answer

How to replace heater core on 89 s15

disconnect negative battery cable
remove coolant reservoir
dis-connect heater hoses at heater core
remove mounting screws and nuts from the heater housing in the engine compartment
remove glove box door and liner
disconnect heater controls ( be sure to lable them so you know where to put them later )
disconnect the computer ( ECM ) an mounting bracket
remove the radio antenna cable
remove the kick pannel and detech the right lower corner of the dash pannel.
pull the heater assembly to the rear for access and dis-connect the wiring harness
remove the screws and nuts retaining the heater housing inside the cab
remove the heater housing from the vehicle
detach the core retaining straps
and wala you got it
to install it just reverse these steps.
good luck

Jun 16, 2008 | 1988 GMC S-15

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