20 Most Recent 1993 GMC Sierra - Page 5 Questions & Answers

Check if there is power at the wiper plug, make sure the wiper motor has a good ground, if both are present then bang on the motor if it starts working then change it. As for the fluid motor make sure that you can hear it come on when powered, if not see if you have power when pushed to spray, if you have power on demand change the motor.

The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems ca cause many drive-ability related problem such as rough idle and other symptoms

You have a failed transmission is my bet.

check the fuel line pressure on the injector rail ,here you will find a valve that looks like a tyre valve and take the cap off and connect a pressure gauge to this and see what you get should be around 55lbs

if you press the ac button, do you hear a faint "click" inside the vehicle? someplace next to the passenger area floor there is a relay for the ac. Turn the vehicle on and press the ac switch while you are near the glovebox area and see if you hear the "click" if you hear that, your ac compressor is probably dead. If you don't hear that click. it's possible that the ac relay is dead and that's usually cheap at the auto parts store. good luck!

There is a small crack somewhere letting rain and moisure get in it. May have to check salvage yards for a replacement. or go to car parts.com to get a new one. Also there is a rubber gasket on the blub base to keep water out check that also,

i have a 1993 suburban gmc 1500. when i put the key in an turn it nothing happen at all.befor the car stop running it use to act crazy like start up in run great but when u turn it off it dont start back up. u wll have to wait than it will start..can u tell me what that can be..

There is wear in the engine which allows it to burn a little oil. When cold, the clearances are looser, and a bit more oil gets through. It will be either the piston rings, or valve guides and seals, which need attention.A compression test, which you can do yourself, will probably show a loss in compression in one or more cylinders. Do that to get a baseline, then squirt a teaspoon of oil into the spark plug hole and repeat the test. If the test result improves, the rings are worn. If not, the valve guides and seals need work.http://autos.yahoo.com/maintain/repairqa/engine/ques056_1.html

check to make sure that your not loosing fuel pressure once your truck dies if there is a leak your fuel system may have to prime itself. Also check and make sure your fuel system is holding the correct fuel pressure while running you could have a fuel pump thats going bad on you.

inside the oil pan typically, it's a mechanical style pump that runs as long as the engine is turning. if you need to inspect it you will have to drop the oil pan.

The gear shift lever indicators tell you what gear you have an automatic transmission in on your vehicle. The shift solenoid tells the transmission when to shift gears and what gear to shift into. Newer model automatic transmissions have electronic shift solenoids that are activated and change gears based on the speed the vehicle is traveling. Troubleshooting either one of these transmission components is relatively easy if you know a little about automobile mechanics. With the right tools, you can determine whether the transmission shift solenoid is having a problem. Gear shift indicator problems can be determined simply by moving the gears into their designated position.Transmission Shift Solenoid

• 1 Raise each corner of the vehicle up with the car jack and place jack stands under the frame. Make sure the car is raised high enough so you can work under the car freely.
• 2 Slide the drain pan under the transmission fluid drain plug. Remove the drain plug with a ratchet and socket, and let all the fluid drain out of the transmission. Remove the transmission pan bolts with a ratchet and socket. Pull the pan away from the bottom of the transmission, revealing the transmission shift solenoid.
• 3 Wipe off the shift solenoid with a shop towel. Disconnect one of the two plugs that attaches to the shift solenoid. Turn the knob on the volt meter to the ohms setting, so resistance can be measured. Set the volt meter on 200.
• 4 Take the black lead of the volt meter and touch the negative battery terminal wire. Take the red lead of volt meter and slide the tip into the terminal plug you just disconnected from the shift solenoid. Look at the reading you get on the digital display of your volt meter. Determine if the reading is between 12 and 25. Readings below 12 or above 25 tell you that the shift solenoid is not working. Reattach the plug to the shift solenoid and pull the second plug attached to the solenoid. Perform the same procedures on this plug wire. Replace the transmission shift solenoid after determining it is bad.

Gear Shift Indicator

• 1 Move the gear shift into the desired gear. Look at the gear labels and the arrow, or other indicator, to see if the gear shift indicator lines up with the selected gear.
• 2 Move the gear lever to another gear and look to see if the indicator lines up with the selected gear. Misalignment of the arrow will tell you if there is a problem. Moving the gear shift to "neutral" but having the indicator show the transmission is in "drive" tells you the gear shift indicator is not working properly.
• 3 Try each gear position to determine how much misalignment is in the indicator. Slide under the car and check for a loose gear shift cable. Check all the gear shift cable connections to ensure they are all tight and are not missing. Tighten any loose gear shift cable clamps or bolts. Replace the gear shift cable if you find that this is causing the misalignment with the gear shift indicator.