Question about 2006 Pontiac Grand Prix

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'06 Pontiac Grand Prix and the speedometer isn't working

I have no other problems in the instrument panel cluster, the self test diag works except for the speedometer which sticks at the beginning on start up or goes all the way over and does not return back to zero. During driving it doesn't show mph/kph. Please Help!!!

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  • 2 Answers

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Posted on Jan 02, 2017

  • 18 Answers

SOURCE: 1991 Volvo 740GL Speedometer

I remove two panel underneath the steering column. The first panel is removed using a 10 mm socket. The second panel is removed using a torx socket (can't remember the size). Removing these two panels gives you room to get to the clip on speedomter. Looking at the speedometer, you should see two rectangular holes on each side of the speedometer cover. I use a awl to push in the clip (you could use a screwdriver). Looking underneath the dash, you should be able to see the clip you are pushing on with the awl. I take my 2nd awl and put it behind the clip. I get the left side to release. One the speedometer cover releases, you can see the speedometer. You will see the 4 torx screws (t20) and two smaller clips holding the speedometer. All that is left is the wiring. (I take a sharpie pen and mark one of my wire locations on the speedometer. I am not sure what it does. It is a single wire.)

Posted on Aug 20, 2008

  • 77 Answers

SOURCE: 2003 F350 Intrument Cluster

If everything keeps going like that then it sounds like its a problem with the onboard computer. The computer controls all the guages and would explain why they all fail at the same time.

Posted on Oct 20, 2008

  • 20 Answers

SOURCE: Speedometer Conversion

personally i find that that is a waste of time any money for the reason that he should know or be taught the conversions such as 60 mph to 100 km/h and the basics and it probable would not be cheap if you want to get it done right.

Posted on Oct 22, 2008

  • 1170 Answers

SOURCE: My bmw 318is instrument cluster doesnt work

The fuse must have blown off. Replace the fuse.

Posted on Mar 24, 2009

  • 22 Answers

SOURCE: pontiac 2003 aztec cluster panel not working

GM has a problem with clusters but the government nor GM will do a recall on the clusters. Check ur local yellow pages for a Speedometer fix company , if u cant find one hit me back and I can find one for you.. In Houston we pay $250 for the service.

Posted on Aug 09, 2009

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How many miles on it ? Has it ever been done before ? Mite as well have cooling system flushed too . New antifreeze , I think 100,000 miles it should be done at . GM had problems with stepper motors in the instrument ,these step motors control the gauge's . Have had an instrument cluster problems ? Bad step motors 03 to 06 but who's to say some where not put in 07 . I replaced a few instrument clusters because gauges not reading right. We can test this at the dealer with factory tech 2 scan tool . Do the cooling fans turn on ?
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What is the location of fuse for speedometer on 2o04 ford explorer


Speedometer The instrument cluster receives the vehicle speed sensor (VSS) signal from the powertrain control module (PCM) through the standard corporate protocol (SCP) communication network. The instrument cluster monitors the VSS input from the PCM and commands the speedometer with a corresponding movement of the pointer.
  • The speedometer/odometer is inoperative
  • Circuitry.
  • Powertrain control module (PCM).
  • Instrument cluster.
  • Go To Pinpoint Test L .
PINPOINT TEST L: THE SPEEDOMETER/ODOMETER IS INOPERATIVE Test Step Result / Action to Take L1 RETRIEVE THE RECORDED DTCS FROM BOTH CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER SELF-TESTS
  • Use the recorded instrument cluster DTCs from the continuous and on-demand self-tests.
  • Are any instrument cluster DTCs recorded?
Yes
If instrument cluster U1123 is retrieved, REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual to continue diagnosis.

For all other instrument cluster DTCs, REFER to the Instrument Cluster Diagnostic Trouble Code (DTC) Index.

No
For inoperative speedometer, GO to L2 .

For inoperative odometer, GO to L3 . L2 CARRY OUT THE SPEEDOMETER ACTIVE COMMAND USING THE DIAGNOSTIC TOOL
  • Connect the diagnostic tool.
  • Key in ON position.
  • Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster Active Command.
  • Select the instrument cluster speedometer active command.
  • Trigger the speedometer and scroll in increments of 10% while monitoring the speedometer. The speedometer should increase in increments of approximately 20 km/h (12 mph) for each 10% change.
  • Does the speedometer increase within specifications?
Yes
REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual to continue diagnosis.

No
GO to L4 . L3 MONITOR THE INTEGRATED CIRCUIT DISPLAYS
  • Key in ON position.
  • Monitor the compass, air temperature and message center functions of the integrated circuit display.
  • Do the compass, air temperature or message center displays operate correctly?
Yes
GO to L4 .

No
Go To Pinpoint Test AE . L4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
  • Disconnect all instrument cluster connectors.
  • Check for:
    • corrosion
    • pushed-out pins
  • Connect all instrument cluster connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present?
Yes
INSTALL a new instrument cluster. REFER to Instrument Cluster in this section. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. There isn't a fuse just for the speedometer , there are four fuse for the whole instrument cluster . If one of these fuse's were burnt you would have more then just the speedometer not working ! You need to have a scan tool to find out what is up ! you could need a new cluster ! Is the check engine light on ? if not wouldn't think vehicle speed sensor bad , besides speed info for speedometer PCM uses for transmission shift points ! Good luck ,hope this helps !

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Good Luck

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Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Grand Prix instrument cluster repair

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