20 Most Recent 1989 GMC Sierra - Page 8 Questions & Answers

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.

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the return spring is inside the power booster(what the master cylinder bolts to) but most likely it is the brake light switch the box on the pedal where it coonests to the booster shaft

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.

trans need repair

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

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

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

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.

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

fuel filter?

with a dc voltmeter check for 12 volts on bulb socket. IF there check the ground screw located by the housing. IF missing check the factory trailer jump plug under vehicle. IT may be loose.

Your Transmission is not electronic so its not the speed sensor . Your transmission uses engine vacuum and cable to determine when to shift. You need to check for engine vacuum at the modulator on the side of the trans it is a small steel tube with a rubber hose at the end. Also you have a throttle cable that is connected at the throttle body and goes to the trans if this cable is stuck it will delay the up shift. Get a good service manual and it will directions on how to adjust the cable and some more troubleshooting steps.

check all your positive cables coming out of your positive battery terminal.i have seen them corrode there before and cause no power to the vehicle.

I assume there is a pin-hole in the line? Easiest way is to find the leak, cut it out, and reconnect with the right size fuel hose (should be 1/4" or 3/8"). Make sure to use small hose clamps to connect the hose

Lower the tail gate and you will see the two screws that hold the tail lamp assembly to the bed.