Speedometer problem - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 03-02-2017, 07:36 PM
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AnviL_Man AnviL_Man is offline
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2005 GMC Envoy SLE
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Speedometer problem

My speedometer won't work sometimes and sometimes it will work fine other times it'll read incorrectly, for example it'll say I'm doing 30mph when I'm really doing 60mph and so on. It seems to be getting worse, is it the step motor malfunctioning or something else? Thanks in advance.
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  #2  
Old 03-02-2017, 10:40 PM
wcraven03 wcraven03 is offline
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Transmission speed sensor possibly but it would also affect other features on your car also.
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  #3  
Old 03-06-2017, 07:48 PM
Primus Primus is offline
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Mine's been doing the same for the past 5 years. Haven't held a correct read in 3. Initially, it would only be off when it gets cold and works fine for just a few months in the summer.

Been told that its an instrument cluster issue? Haven't looked into it myself and not sure how vague that answer really is.
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Old 03-10-2017, 10:56 PM
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AnviL_Man AnviL_Man is offline
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Quote:
Originally Posted by Primus View Post
Mine's been doing the same for the past 5 years. Haven't held a correct read in 3. Initially, it would only be off when it gets cold and works fine for just a few months in the summer.

Been told that its an instrument cluster issue? Haven't looked into it myself and not sure how vague that answer really is.

Interesting. It seems mine is also triggered by colder days. Oddly The other day I noticed my fuel gauge reading improperly as well. This is the first time seeing this, I filled up and the needle went way beyond the F mark, past where it normally reads a full tank.
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Old 03-12-2017, 11:31 AM
Primus Primus is offline
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Quote:
Originally Posted by AnviL_Man View Post
Interesting. It seems mine is also triggered by colder days. Oddly The other day I noticed my fuel gauge reading improperly as well. This is the first time seeing this, I filled up and the needle went way beyond the F mark, past where it normally reads a full tank.
Same... As my problem has progressed and I've completely ignored it, the speedometer doesn't seem to work year round nowadays. Also the fuel gauge sometimes is off as well as other gauges, which leads me to think the problem isn't specific to the speedometer.

I've recently had other problems from a bad, crisscrossed jump performed by my wife. I'm going to have a diagnostic ran Tuesday, so I'll let you know if I find anything.
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Old 03-25-2017, 02:23 AM
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AnviL_Man AnviL_Man is offline
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Any update on this? My speedometer is still not working properly and the same with my fuel gauge.
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  #7  
Old 03-26-2017, 10:00 PM
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Cooleyd31 Cooleyd31 is offline
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2003 GMC Envoy SLT XL
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Quote:
Originally Posted by AnviL_Man View Post
My speedometer won't work sometimes and sometimes it will work fine other times it'll read incorrectly, for example it'll say I'm doing 30mph when I'm really doing 60mph and so on. It seems to be getting worse, is it the step motor malfunctioning or something else? Thanks in advance.
I just replaced step motors because of the same issues. Works perfect now.
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  #8  
Old 05-29-2017, 11:29 PM
vivikos2 vivikos2 is offline
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I came across the same issue.
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  #9  
Old 10-07-2019, 11:48 AM
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davehorch davehorch is offline
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Instrument gauges malfuncioning common problem

I've read somewhere that 2000's GMCs experience issues with the instrument clusters. My 03 Envoy has a malfunctioning oil pressure gauge, speedo, gas gauge. I've read that the fix is to replace the whole dang instrument cluster, Which sounds like a ton of work. Has anyone had this done? If so, what did it cost (time and money)? Any advice would be greatly appreciated.

Thanks, -Dave Horch
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