20 Most Recent 2003 GMC Sierra - Page 9 Questions & Answers

bad speed sensor on trans buy the part its easy to replace on the side of trans one connector

If the brake pedal goes to the floor and there are no external leaks, then the master cylinder may need to be bled.

Check all your wiring to make sure there is no corrosion, and definitely check the negative going to the ground. Clean all the connections up and see what you get then. Also you can use a multimeter to see if your battery is actually getting charged or not.
Thanks,
Lee

have intake checked for leaks and also check throttle body plug for moisture.

blower motor resistor bad.it is under the dash on the passenger side.

The resistor is bad . Find the blower and the resistor will be next to it. Mounted in the plenum.

The pulse board is located on the wiper motor. It usually has 3-4 screws on it and the female connector for the plug. Remove the screws and it lifts right up. Then remove the plug.

its possible that the oil gauge go to bad, the oil pressure sending unit may have gone bad, the oil pump may have quit. I suggest you find the oil pressure line coming off engine, put another oil pressure gauge on it and then just crank the engien to see if you get any oil pressure whatsoever.


If you don't, then I would check the oil pressure sending unit next before I tore the oil pan off to examine the oil pump itself. Whatever you do, do not run the engine with zero oil pressure otherwise you will seize up the engine and that will cost big bucks to repair.

Hope this heslp (remember to rate this answer)

You need to have a scan tool to see what codes are on the HVAC module.This will help in finding out if it is a air temp actuator not working or a mode door.The actuator for the left side is easy to get to but the one for the passengers side is the hard one.The dash panel has to come off.That is why it is important to get the codes.It could also be wiring or connection.Hope this helps.Good luck.

Hi

check the cables if you have good connection on battery
after thet check the fuser box
if all the fussers are ok

Come over to; http://www.denalitrucks.com/forum/ There is a whole section dedicated to Quadrasteer.

Chances are that the light is coming on in response to a faulty oxygen sensor or something else that will not have a direct effect on performance or fuel economy. It will effect emissions though, so the truck will pollute more than usual and may not pass a state inspection. The only way to be certain is to have the OBD computer read by your mechanic, dealer, or parts store. Many parts stores will "pull the codes" at no charge.

Go to this site
http://www.fueleconomy.gov/feg/best/label.shtml
It wil give you other information regarding required labelling for your vehicle.

Your rating of this answer would be very much appreciated. thankyou for using FixYa.

Go to any Autozone and free of charge they will run the code for you, This will tell you "why" the engine light is on. If it's important - fix it or go to shop. If it's something that is minor and doesn't effect the trucks coming and going to next step. Hook up the code reader - again....see if the light comes back on. If it does then ask the Autozone employee if you hold the code reader. There is a "cancel" button to get rid of the code. You can delete the code. The Autozone is not supposed to erase the code. BUT HE CAN LOOK AWAY WHEN YOU DO IT!

Go to autozone or whatever auto parts store is close to you and have them check your charging system. Most places do this for free and they can determine exactly what part you need to replace.

try cleaning with cd player cleaner

Check you thermostat if it is blowing cold air. Also check your coolant level in your radiator.

switches do go bad but rarely, i think your problem is the resister.

That is the speaker for onstar