Question about 2003 GMC Envoy

1 Answer

At idol it reads 60 and whi le driving it goes to 120mph.checked for codes none stored looked for loose ground none what ya think?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 447 Answers

You most likely have a bad servo motor inside the cluster which is what actually moves the speedometer needle. Similar servos also move the rest of the needles in the other gauges. I see this type of failure fairly often and the fix is to remove the cluster and have it sent out for repairs. There are several companies that can do this but I usually take the ones I encounter to my local GM dealer and have them send it out. I prefer to have the one that came out of the vehicle fixed and returned rather than exchanged but either method will work fine. Most places will replace all the servo's and bulbs. Haven't seen one fail again after being repaired. Hope this helps you find your problem!

Posted on Jul 14, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Why is my 2005 dodge neon sxt automatic significantly jerking at 60 mph?


You have an intermittent problem, and it's probably going to be horribly difficult to track down. Your best bet might be to borrow an OBDII scan tool so you can read the codes while the problem is happening.

That mechanic who visually inspected your camshaft position sensor apparently doesn't understand that the sensor can LOOK just FINE while at the same time it's as dead as a doornail. You might try having that one sensor replaced, just to be sure.

Aug 04, 2014 | 2005 Dodge Neon SXT

2 Answers

Gauges dont work and stalls while driving


Although your question is unclear, I think you are trying to say that the vehicle is stalling out, and that you have an error on the dashboard display saying "NOBUS."
The "NOBUS" error means that the dashboard display is not receiving data from the main computer.
First, check that your GROUND BUS CABLE and GROUND STRAP are in good condition and making good contact. If the grounding is good, your main computer has failed, or the main computer connection is loose or dirty. ALSO, CHECK TO BE SURE THAT YOUR MAIN COMPUTER MODULE HAS GOOD GROUND.

Jul 25, 2014 | 1999 Dodge Durango

1 Answer

Car starts and idols great but cuts out and dies when I give it gas, like it's flooded. Already changed fuel pump skreen and fuel filter. Air, fuel mixure?


  • too high fuel pressure. 30 ok 60 bad. PSI
  • leaking injectors
  • ECU injector driver shorted, turning on injectors full time
  • injector drive wire shorted to ground bad wiring.
  • ECT stuck at -40F (alaska temperature) USE a SCAN tool.
  • MAP sensor vacuum hose/pipe clogged (ECU thinks your are going up hill all the time and floods.
  • The scan tool can check each , but not fuel pressure.

that is a start,

Feb 20, 2014 | 1997 Toyota Corolla

1 Answer

Engine stalls while driving!


as your description is a little uncertain that is why the answer are a little mixed
however the basis of the description indicates a battery problem , probably loose/dirty battery terminals or loose /dirty ground wire to the engine
check the ground wire condition

Apr 20, 2017 | 2000 Buick Century

1 Answer

My 2005 dodge stratus coupe sxt will not idol why


You need to proof read your message. Look for a vacuum hose off. Let someone start it you with the hood up listen for a hissing sound. Most times they come lose when you've had work done in the area of the motor. If that is not the fault check for a code with the ECM.

Feb 01, 2013 | 2005 Dodge Stratus Coupe

1 Answer

Why does my 2000 alero loose power when going high speeds


Hello
The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type.

Sep 13, 2012 | 2000 Oldsmobile Alero

1 Answer

Emission test showed up computer not ready after I change the battery. How far do I need to drive it to make it ready?


It shouldn't take that long and actually shouldn't have anything to do with driving the vehicle. Normally this type of a problem is a loose wire, blown fuse or a simple reset procedure. First check all the battery cables for corrosion and crackling like they are brittle, if you find any clean them up or replace them. second, check the interior fuse panel, I'm not sure of the fuse location so check them all to make sure none are blown and check the wires that connect to the computer to make sure it is properly connected. Finally, remove the Negative battery terminal for 60 seconds and then reconnect it. Wait 5 minutes then start the vehicle. Your check engine light should be cleared, if it was on, and stop at an Auto Zone or Advance Auto and ask them to read any stored codes in the computer. If none of this helps you are going to have to have that computer flashed by the dealer. They are the only ones with the software to do that.

Nov 22, 2011 | 2004 Pontiac Grand Prix

1 Answer

Low idol speed


have someone hook up with better scan tool that reads more than code 6

Aug 24, 2009 | 1993 Honda Accord

1 Answer

Speedometer and gas gauge are giving false readings!


IT SURE SOUND TO ME LIKE YOU ARE MISSING A GROUND TO THESE GAUGES. THIS WILL BE TOUGH TO LOCATE WITHOUT A SCHEMATIC DRAWING TO HELP YOU. YOU MAY BE ABLE TO LOOK UNDER THE DASH FOR A LOOSE WIRE. YOU CAN ALSO CHECK THE FUSE PANEL FOR THE FUSE MARKED GAUGES TO SEE IF IT IS MAKING GOOD CONTACT. HOPE THIS HELPS. BEST OF LUCK. LET ME KNOW PLEASE. THANKS FOR USING FIX-YA!!!!!!!!!!!!

May 05, 2009 | 1998 Isuzu Rodeo

1 Answer

1994 cadillac seville sls, won't idol


Sir, I think my first thought would be your Idle Air Control, It would be best to know if your check engine light is on and what code it is throwing. If you do not know how to get the code I can help you with that too but I will have to do some research, most these used the climate control to access the codes. I may be wrong about that but I know I have used that display before for diagnostics, it may have been only the ac diagnostics. A quick search on google for something like " how to read diagnostic engine codes 1994 cadillac sevile should return you with the information. Most other gm autos you just ground the diagnostic terminal and watch check flash the code to you a code 12 is normal.

Dec 12, 2008 | 1994 Cadillac Seville

Not finding what you are looking for?
2003 GMC Envoy Logo

89 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

74945 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...