20 Most Recent 2003 GMC Sierra - Page 8 Questions & Answers

The fuel pedal is not the problem take the new one back to the dealership and get your money back.

The problem is the Throttle Positioning sensor ( TPS Switch ) this is what controls your throttle and how fast you go. It is located on the side of the throttle body. It is a black switch that is held in place with 2 small bolts and it has slots in it for adjustment It will have 2 -3 wires coming off it. Remove the air pipe going to the throttle body, then remove the wire harness from the TPS switch. TRy to mark the position of the old switch before removing it so you can get the new one back in the approximate same location. Then remove the 2 bolts and remove the switch. Reverse the order to re install the new switch. It is adjustable with the slots in the switch mounting bracket. You will need a scanner hooked up and or a volt meter to get the correct adjustment of the switch. You will have to look up the specs for the voltage at the switch well at idle to get the correct adjustment.
Go to this web site http://arrc.epnet.com/autoasp/index.asp?sid=101932511&uid=ns011811.main.autorefctr and this will give you the correct procedure for this replacement. Hope this will help you.

take alternator off and take to local part store they can check for free

truck has a pass- key anti-theft system you will have to take the VIN # to GM and have them make you a key you can not hot wire or bypass the system, the truck will nut run with out the key....sorry

Did the battery cables get connected? Did you get all your ground wires installed properly? Are all of the wiring harnesses plugged in correctly?

Check the "T" plug where harness is hooked up. Sometimes dust and dirt will get in and cause you to lose connection. I use Electronic silicone grease in the connection to reduce dust accumulation and keep water out.

No. It is a bad alternator. When they test the alternator they turn it at faster rpm. When it turns at faster rpm it is charging fine. What the problem is the voltage regulator in the alternator is going bad. When you turn your blinker on I bet the voltage shows on the gauge. Moves up and down with the blinker.

Try resetting by holding gas pedal down at 2500 RPM for 2 minutes and 30 second then end with a snap in pedal and release. If this doesn't work you will need to replace idle speed control. The idles is set by manufacturer and should-NOT be adjust manually. Good Luck and Thanks for using FIX YA

Its is under the hood on the pass. side. under the pass. seat or behind the seats.

If you can hear the motor turning, then there may be a problem with the plastic cogs on the gear. If you can't hear the motor turning, then check the fuse, if the fuse is good. If both of those fail, you may need a new motor.

it sounds like have the left wire hooked up to brake and hazard wire has it always been that way r just start

Your not going to believe how easy it is to replace this one.

The thermostat is located behind the housing bolted to the water pump that the lower hose attaches to. remove the lower hose from the housing. Remove the 2 bolts holding the housing to the water pump with either a 10mm socket or wrench.

The new stat will come as a stat/housing assembly. bolt it on. Reattach the lower hose. Fill up the reservoir. Let the vehicle idle until up to operating temp making sure to keep the reservoir topped off while the engine warms up. I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

maybe relay in fuse box under hood stuck

It usually takes five quarts of transmission fluid if your replacing the filter. If the transmission is completely empty, such as a new unit, it takes about ten.

Have you checked your dash fuse yet?

First, all I can do about the Email answer problem is oppologize on behalf of fixya for the problem. I would correct that problem for you, but I do not have that authority or ability. The best advise I can give you is to send an Email explaining the problem to [email protected]. Someone there should be able to get it straightened out for you.

As for your truck...I see that someone told you to "check the fuse".....Just disregard that....I appologize for that one as well. There is no way possible that a fuse is going to cause an electrical failure in ANY circuit, let alone, an intermittent failure that gradually gets worse - which is what I understand you to be describing here. Please also take a few minutes to review this article: Where's The Fuse?

I believe that your problem is most likely due to a communications fault in your Controller Area Network (CAN) system. Your Instrument Panel Cluster (IPC) is not communicating with the other modules that it needs to communicate with. There are several possible causes for this. It could be due to a short or open circuit in the Class 2 data circuits, High resistance (resulting in low voltage) in the Ignition circuit to the IPC, High resistance in the groung circuit to the IPC, or it could be an IPC that has failed internally.

The most expedient and accurate method of locating the cause of this failure would be to scan the CAN system in your vehicle. I am willing to bet that you will find one or more "U-codes", which are codes dealing with the communications network. You may find that the IPC will not communicate at all. In this case, all of the modules that the IPC is supposed to communicate with will set codes telling you that they have lost communications with the IPC. It could even be the other way around. i.e. The IPC is communicating just fine, but the modules it gets its information from are not communicating - in this case, the IPC will output U-codes.

Anyway, a FULL scan of the CAN system is where the diagnosis needs to start.

Please also note that scanning the vehicle with a generic OBD code reader will most likely not tell you anything. Generic OBD codes are for emissions-related faults only. They will not give you any information about your Controller Area Network.

you need to clean throttle body w/ carburator cleaner and update your pcm.

You can hook up a scanner of course or you can reset the computer on the car by disconnecting the battery cables and touching the ends together for a minute. This grounds out the computer so it has to reboot itself.

sounds like fuel. could be a partially plugged fuel filter, or a fuel pump.

ONE OF 2 THINGS TPS(THROTTLE BODY POSITION SENSOR ) OR APS(ACCELERATOR POSITION SENSOR) THATS IT NOTHING ELSE DO NOT BE FOOLED BY DEALER.BOTH CAN BE PURCHASED AT PARTS STORE AND EASILY INSTALLED IN 15 MIN OR LESS.