Question about 1994 Chevrolet Suburban

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Chevrolet suburban voltage gauge fluctuates

When at a stop the truck engine runs rough.also noticed voltage gauge fluctuates like 1 volt

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The rough running is the cause of the voltage gauge movement.. As the engine speed increases and decreases the voltage output of the alternator goes up and down. So the gauge is a symptom not a problem.

Posted on Feb 14, 2012


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Posted on Jan 02, 2017

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SOURCE: 1995 Chev S10 4.3L V6 rough idle and under power

This make/model has a chronic problem with EGR clogging. If you have a dashboard indicator showing "check engine" most likely it is a trouble code indicating and EGR (exhaust gas recirculator) valve problem. Symptoms are rough idle, and surging and stalls.

What happens is sediments from the exaust manifold get sucked up into the valve when it opens, then stick in the valve and keep it from closing. When the valve is open when it should be closed, the engine runs very rough.

I removed my egr and then dislodged the sediment (pea-sized debris) and then re-installed the valve. Three days later, the same "check engine" and same rough idle. I must have did this at least three or four more times.

What I found that gave me a permanent solution was an aftermarket filter gasket that keeps debris from clogging. I don't remember the name of the product, but a search for "EGR filter gasket" may lead you to the product.

Install the gasket between the EGR and the exhaust manifold and you should be good to go. Note: on 1995 and newer models, disconnecting the EGR from the wiring harness (common on R&R) may require the computer to be reprogramed.

Posted on Dec 24, 2008

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SOURCE: fuel gauge fluctuates on 1995 chevrolet tahoe

if you replaced the tank and all i assume you didnt change the fuel pump. if you dint then all thats wrong is that the float on the fuel pump is gas logged and will move more than if you had put in a new pump thus the fluctuation in the guage.

Posted on Jan 28, 2009

  • 2005 Answers

SOURCE: i was driving on a

yes it is called the "rollover switch" usually located in the "trunk" area by the fuelpump follow the wires then reset the switch

Posted on Apr 21, 2009

  • 6674 Answers

SOURCE: 1962 CHEVROLET TRUCK with points

If/How long will it crank over before it stops? Are you saying it will crank over, but very slow? Has it been sitting quite a while. Got good spark, and fuel?

Posted on Jan 01, 2010

  • 3600 Answers

SOURCE: 2003 chevrolet truck volt gauge reads high

Very common problem with chevey over time the gauge goes bad, but first take it to auto-zone and have the voltage checked if it's 14.5 volts if it is the altanator is most likely ok. You can buy a new gage at any dealer $15.00 and remove the four front bezle ring or beauty ring 4 screws two on top two on bottom. Then pull the plastic cover and pull the volt gage out and push in the new one in it's plase and your done.

Posted on Jun 30, 2010

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