Top 20 1989 GMC Sierra - Page 5 Questions & Answers

There are 2 versions of each (car and multi lever): with and without the cruise control. Are you sure you got the correct lever for your car? Because the connectors are individually shaped, they cannot be inserted in the wrong place or in the wrong way.

well i payed 1500 for mine. but its a 4x4 with a 3in lift and a rebuilt trany with shift kit

Muncie 4 (117MM) speed---Lubricant Type---------80W-90 Gear Oil
Muncie 5LM60 (HM-290) 4 & 5 Speed ---------Lubricant Type------Syncromesh Trans Fluid T2850

Oil Capacity= 5 Speed (85mm & 109mm)--3.6 pt (US)
(New Venture Gear 4500)--8pt (US)

4 Speed= (85mm)--3.6pt (US)
(117mm)--8.4pt (US)


Hope this helped you ??

when replacing coolant, did you bleed the air from system! you can remove radiator or overflow cap when cold. start vehicle and let it run until thermostat opens,when all air is out hoses should get hot. but before starting, turn heater on to high setting, if you vehicle does not have a air bleeder on it. do as above. just be sure radiator is full of coolant. after hoses get hot, turn off heater, then put cap back on radiator or overflow. good-day! the first thing to do is to check for a stuck closed thermostat. do this first ok!

You can test the horn itself by running a jumper wire to the positive post of the
battery for a second to test it, there is a single terminal with a spade connector to touch
the jumper to on the horn.

The contacts in the steering wheel may be bad also due to the age of the vehicle.
You can unplug the horn wire and test it to see if
you are getting voltage to the horn wire when someone presses on the horn.
you can test this with a 12 volt test light or a volt meter.

If the relays are identical in the relay box, you could swap two of them around to check
relay out.
Hope this is useful

They sell a kit to install the radio where the tape player is located. To access the wiring you will need to remove your gauge cluster surround and remove the radio.

The best way to help in this is set the ebrake everytime you stop before letting your foot off the brake. It sounds like the pawl in the transmission that sets when you put the vehicle in park to keep the internals in the transmission from moving, has excess pressure on it. Possibly due to parking on an incline. Make sure your rear brakes are adjusted up properly so when you set the ebrake it will keep the vehicle from rolling and putting excess pressure on the pawl. Good luck and let me know how it goes.

the dist.is to far advanced. be sure to get good quality cap and rotor when replacing.

The parts (slave cylinder and fluid) should cost in the area of $75 - $120, depending on your model vehicle and the labor should be about $200.00 - $240.00 depending on the shops hourly rate.

In case of a problem or clarification or my solution was insufficient, don't hesitate to post me a reply.

If you are satisfied, rate my solution with the "thumbs" or (even better) add a testimonial.

The problem indicates towards few possibilities that are to be checked and replaced.------- MAP sensor, TPS( throttle position) sensor, fuel pressure reg and fuel filter.The problem with fuel pressure.-------- The fuel pressure is low.---------- First thing you can do is get the fuel pressure checked, this will confirm the problem. --------- If the pressure checked low that means problem is with faulty pump and clogged fuel filter.But if all this checked ok, then This problem can be an EGR opening to early & causing a momentary lean condition. The only good test is to disconnect the EGR "for testing purposes only" . Go for a test drive & if there is a noticeable difference ,replace the EGR valve.---------
----------
This should help.Thanks.Helpmech.

electronic spark control module is bad

First I would check the fuses. You may have two fuse boxes. One inside and one under the hood. You can check for voltage on both sides of the brake switch to verify proper operation. That's where I would start.

The wires would be secured under the rear of the truck. However trailer wiring is only for trailer lighting. Electric trailer brakes require a trailer brake controller.

SOUND LIKE IGNITION SWITCH BROKEN WHERE YOU CANT TURN OFF THE IGNITION.

The basics are fuel, timing and igntion. Seeing as you have changed the fuel filter and it runs for quite a while, you should take a look at the igntion system. The most common cause for your type porblem is the coil over-heating and shorting out. This could be caused by leaking plug wires or the coil itself is bad. Another less likely cause is the igntion module an-or the pickup coil.
With the approximate running time being the same, I'm betting the coil is the cause.
Good luck.

A.T., VIN model "C" (4x2), TH400, 6 cyl
A.T., VIN model "C" (4x2), TH400, 8 cyl, 8-305 (5.0L)
}A}}400}466495" type="radio" name="userInterchange" />A.T., VIN model "C" (4x2), TH400, 8 cyl, 8-350 (5.7L)
}A}}400}466496" type="radio" name="userInterchange" />A.T., VIN model "C" (4x2), TH400, 8 cyl, 8-379 (6.2L, diesel)
E>}B}}400}466497" type="radio" name="userInterchange" />A.T., VIN model "C" (4x2), TH700, diesel
A.T., VIN model "K" (4x4), TH400, 6 cyl
B@}}}400}466499" type="radio" name="userInterchange" />A.T., VIN model "K" (4x4), TH400, 8 cyl, diesel
A.T., VIN model "K" (4x4), TH400, 8 cyl, gasoline
A.T., VIN model "K" (4x4), TH700, diesel
FFC}B}}400}466502" type="radio" name="userInterchange" />M.T., 4 spd, 4x2, VIN model "C"
FFC}A}}400}466503" type="radio" name="userInterchange" />M.T., 4 spd, 4x2, VIN model "R"
ECB}B}}400}466504" type="radio" name="userInterchange" />M.T., 4 spd, 4x4, (VIN model "K")
M.T., 5 spd, 4x2
M.T., 5 spd, 4x4
A.T., VIN model "C" (4x2), TH700, gasoline
F=A}B}}400}466508" type="radio" name="userInterchange" />A.T., VIN model "K" (4x4), TH700, gasoline
}B}}400}466509" type="radio" name="userInterchange" />A.T., VIN model "R" (4x2)

This is possible but would be difficult and expensive.Why would you want to?

A number of possible problems unfortunately. The most common problem would be the ignition module.

check the fuse in the fuse box it my have blown very comen problem with this modal if its ok then the sender unit in the fuel tank is not working then if you know how to take the fuel tank off then do so then take sender unit out and test it in most casies its the unit best to replace it they are not to expensive to replace

That is a classic example of a failing brake master cylinder.