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1989 gmc s15 radio

Heater core replaced now radio wont work

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  • 6 Answers

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

Posted on Jan 22, 2013

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Posted on Jan 02, 2017

ZJLimited
  • 17970 Answers

SOURCE: firing order for a 1986 gmc s15

FIRING ORDERS

To avoid confusion, ALWAYS replace spark plug wires one at a time.

The most important thing to remember about the removal and installation of a distributor, cap or spark plug cable is that all wires MUST be labelled before they are disconnected. Keep in mind that these figures depict a firing order where the distributor cap terminals are relative to EACH OTHER only and they do not necessarily depict the tower positions in relation to the rest of the engine. This is true because any distributor which has been removed and reinstalled may have been installed with the No. 1 spark plug tower at any position (360 degrees) in relation to the rest of the motor, as long as the rotor aligned to the No. 1 tower when the No. 1 cylinder was at TDC of the compression stroke (valves closed, ready for the plug to fire). As long as the remaining wires were connected in the correct firing order sequence (depending on direction of distributor rotation) the engine will run. DO NOT EVER remove more than one wire from the distributor cap at a time unless you tag ALL wires and towers to assure proper installation.

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Fig. 1: 1.9L engine . Firing order: 1-3-4-2 . Distributor rotation: counterclockwise

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Fig. 2: 2.0L engine . Firing order: 1-3-4-2 . Distributor rotation: clockwise

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Fig. 3: 2.5L engine . Firing order: 1-3-4-2 . Distributor rotation: clockwise

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Fig. 4: 2.8L engine . Firing order: 1-2-3-4-5-6 . Distributor rotation: clockwise

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Fig. 5: 4.3L engine. Firing order: 1-6-5-4-3-2 . Distributor rotation: clockwise

I hope help you with this (remember rated this help) Good luck.

Posted on Oct 05, 2009

  • 460 Answers

SOURCE: I replaced heater core in 1999 gmc sierra 1500 5.3

no,, the system works from a vacuum and has to be worked on in a service garage. sorry about the bad news...

Posted on Nov 12, 2009

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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.

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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.

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Don,t throw out much heat.


Have you tried flushing out the heater core with a garden hose?

Mar 02, 2009 | 1989 GMC Sierra

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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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