Question about 1989 GMC Sierra

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Were is the connector to disconnect for ignition timing 89 gmc sierra

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You have to disconnect the brown wire thats on the firewall. It disables the computer controlled advance and allows you to set the base timing. Disconnect SET TIMING connector (tan/black wire) located in harness close to distributor. DO NOT disconnect 4 wire connector at distributor.
Thank you for using fixya and good luck, set timing is O".

Posted on Jul 17, 2010

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Posted on Jan 02, 2017

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1 Answer

Color coded wiring diagram 1995 gmc sierra electric windows


Google the
wiring diagram 1995 gmc sierra electric windows I found several systems offering what you require.
But what is the problem, 99% of the time in that year the window regulator was at fault, it was made from a stapped steel housing verses an cast unit. We check the left switch for power, disconnect the two wire connector at the motor, and see if the motor has power to one side or the other in the connector. If the switch has power to it, and the motor has power to it as you press the button, the motor is at fault.

Good luck.

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Which way should the distrubutor point in a 89 gmc truck


If you line up the timing marks on the crank pulley, you have a 50/50 chance of the number one cylinder being at top dead center. If it is, the rotor points to the number one plug wire.

Jul 21, 2012 | 1989 GMC Sierra

1 Answer

How to change out a ignition switch


First remove plastic column cover,and possibly plastic panel just below that. may be star wrench or regular Phillips.

When you get the panels off you will see two bolts holding the ignition switch in and a harness running down the column. I've never done a 94 specifically so I cannot tell you how long this harness is. I've seen them 10 inches long, and some 2 feet long.

It will be zip tied tight up agents the column.

Fallow the harness to the connector. Disconnect connector. Cut zip ties holding harness in place BE CAREFUL DO NOT CUT ANY WIRES!! ONLY ZIP TIES.

Unbolt bots holding ignition switch cylinder in place, and install new one. May wan to get connector grease for the connector to keep moisture ect out.

Oh, and remember to roll window down and disconnect battery before doing anything.

Good luck

Oct 17, 2011 | 1994 GMC Sierra

1 Answer

The heater / ac in my 2006 GMC Sierra 2500HD has gone out several times. It has always been corrected by replacing the resistor. Replacing the resistor did not work this time. I have checked the fuses...


You have replaced the resistor and the blowwer is good and the fuses are good then i would say its in the switch or power to the switch, maybe at the ignition switch there a bad wire . sometimes the power wire going from ignition switch heats up and causes a bad connection, if you pull connector off the switch make sure the connector to ignition switch is not melted or burnt and also check blower control for the same, i would say that your blower is bad and drawing to much current if you have replaced a few resistors, i think maybe theres a fuse under the hood in the fuse /relay box that may be out or the connection at the switch or ignition is melted. hope this helps.

Jan 22, 2011 | 2006 GMC Sierra 2500HD 2WD

2 Answers

How to pullout starter on 2000 gmc sierra 4 by 4


4.3L Engine
  1. Remove or disconnect the following:

    Negative battery cable Bracket and shield Wires Mounting bolts and shims Starter
To install:
  1. Install or connect the following:

    Starter Mounting bolts and shim. Torque the bolts to 33 ft lbs. (45 Nm). Wires. Torque battery wire nut to 89 inch lbs. (10 Nm) and ignition nut to 18 inch lbs. (2 Nm). Bracket and shield. Torque the nuts to 53 inch lbs. (6 Nm). Negative battery cable

    c5acb83.jpg
    Fig. Exploded view of the starter motor-4.3L engines.


  1. Remove or disconnect the following:

    Negative battery cable Bracket and shield Wires Mounting bolts and shims Starter
To install:
Install or connect the following:

Starter Mounting bolts and shim. Torque the bolts to 33 ft lbs. (45 Nm). Wires. Torque battery wire nut to 89 inch lbs. (10 Nm) and ignition nut to 18 inch lbs. (2 Nm). Bracket and shield. Torque the nuts to 53 inch lbs. (6 Nm). Negative battery cable

a557bbc.jpg
Fig. Exploded view of the starter motor-4.3L engines.

Hope help with this (remember rated and comment this).

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1 Answer

My gas gausge doesnt work in my 89 gmc sierra. How


If all your other gauges work, more than likely you have a bad sending unit in the gas tank or bad ground to the sending unit.

Feb 12, 2010 | 1989 GMC Sierra

1 Answer

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Tword the bottom of the steering colume. It will have a couple of connectors going to it and a couple of rods going to it from the igniton cylinder. IT is on top and not easy to get the bolts out of it. You will need to remove the close out pannel to even be able to see it.

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How to replace an ignition lock switch on a 98 gmc sierra


disconnect battery positive and negative to prevent air bag deployment

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1 Answer

89 GMC Sierra problem


there is an ignition module located rite beside the distributor cap on the distributor base these are well known for getting weak and heating up thus causing your engine to stall.

Oct 13, 2008 | 1989 GMC Sierra

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