No, your fuel gauge is controlled by a fuel pump relay under your hood and if that doesn't fix it...it's the sending unit which is inside the fuel pump, inside your gas tank...speedometer is electronically controlled from your computer...if its not working it's your relay which can be found behind your speedometer...you would have to remove it from your dashboard to get to it.
sounds like your missing a ground somewhere.
SOURCE: I have a 2002 chevy trailblazer LS. The gauges on
check to make sure a fuse hasnt blown or a relay
SOURCE: the odometer speedometer gas gauge and heat gauge do not work
There has been issues with the solder joints on the PIN connection to the gauge cluster. The issue being that over time thru vibration and such one of these solder joints will fail (happened on or 1999) you can repair this though. You will have to remove all of the trim from around the driver's side dash board, this will include the trim towards the center of the dash. Once these pieces are remove you'll need to remove the gauge panel (I believe (4) allen head screws) carefully bring the panel and release the wire clip from it. Looking at the back of the panel, where the plug was, carefully with plenty of light look for one of the pins to have a failed solder joint. It will be very faint however the failed joint will be a fine dark line around the pin. To correct use a small soldering iron and reheat this solder until it wants to flow, let it cool and reassemble.
I hope this may have helped,
Tom
PS: I have helped several persons with this issue, please review my profile; good luck with it (also often times with this issue the ABS light stays on)
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SOURCE: tack,gas gauge,speedometer not working fuse?
It takes a new instrument cluster. About 800 dollars at vw. They also have to program the computer to accept the new cluster.
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