1989 GMC Sierra - Page 5 - Answered Questions & Fixed issues

Hi,If your GM vehicle has the earlier 12-pin OBD-I connector, then this is the adaptor cable you require to connect an OBD-II scanner your vehicle:http://www.ebay.com/itm/GM-12-pin-OBD-II-OBD2-GM-12pin-Diagnostic-Adapter-Cable-GM-12PIN-OBD007-/160670963393?hash=item2568bc56c1&item=160670963393&pt=Motors_Automotive_Tools&vxp=mtrHope this helps....

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.

Yes it is a throttle body injection,looks very similar to an older style carburetor,warning! Do not turn ignition key on during removal of injectors,remove negative battery cable before removal,lightly coat rubber orings with petroleum jelly before installation.

Did you remove the actual radio or just the control head , because the radio itself under the dash on the right hand side of the brake pedal just above the accelerator.

broken trans mount possibly doing that

Hey there.You can purchase a door pin and bushing repair kit to tighten up the hinge area,requires removing the door to replace.If the hinge area is worn to badly,the brass bushings willnot last.Also your window crank handle is held on by a C-clip behind the handle in between the plastic shim and the handle which requires a special tool to remove or a small screwdriver to get the clip off.It is hard to see.The shaft that the handle is on are known to wear also and if thats the case you will need to have the window regulator replaced.Hope this helps.John.

Could be both bulbs have burned out at once. Or could be the brake light switch. The third brake light and the normal brake lights operate seperatly. Or could be the wires.

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!

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

actually that first soultion is wrong it is correct on smaller pickups but on the full size pick ups they use a differnet sytem
there a electric actuator on front axle
there be two elctrical plugs on front axle u want the bigger of the two other one is just to turn the 4 wheel drive light on
un plug actuator then remove actuator after it removed plug it back in but leave it out of axle turn key on and shift down to 4 wheel drive the actuator should move out if it dont that your problem if i does move this isnt your problem it either the tranfer case or in front axle

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 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.

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.

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

Check your emergency brake. Make sure it isn't partially pressed in. Try unplugging the switch to the emergency brake and see if the light goes out; if it does the switch is bad.

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 ??

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.

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.

This all depends on torqe converter size,C-5 tranny "Chevy" Usually it takes around 4 qt's and another 2-3 to top off pan. good luck to you.