Question about 2000 Chevrolet Lumina

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Erratic Flickering of all electric devices (headlights, dashlights, AC)

I experience erratic flickering on headlights, dash lights, millage display, radio display, and even hear the AC fan speed varying up and down irrespective of the set fan speed. I have changes the alternator, the battery, and the battery terminals but the problem persists. I had a shorted spark plug wire. I replaced all wires (an expensive set for the SS 5.7L model)and changes the spark plugs. The problem was very severe before I changes the worn out wire but it continues despite all the replacements. I have consulted 2 car electricians but that didn't get me any where. Please help.

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  • Chevrolet Master
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Did you use a Delco rebuilt Alternator? The ones you get from so called discount auto parts stores are junk and they may be the cause of this problem, monitor the output of the system with a DVOM meter, does the voltage fluctuate? Have you check all the chassis grounds? They are the biggest source of this type of issue when the Alt. is ruled out.

Posted on Apr 21, 2017

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: erratic control panel

This is the solution if your car sometimes has unexplained water on the passengers side floor after it rains and the Blower is working erratic.The solution lies under the large black bezel/cover below your windshield wipers. Under this bezel on the passengers side is a piece of weather stripping that has fallen off. You will see it right away. If you fix this and replace your blower motor and resistor your HVAC will work correctly again. I spent a year trying to figure this out.

Just remove the bezel and check the weather strip. You will be able to see where it was by the discoloration. It falls off by poor design and allows water to seep into your blower motor shorting out the resistor and if left unchecked will smoke the blower motor also. You want to add some silicon sealant and replace the weather strip to it's original position.
As far as the blower motor and resistor it is not all that difficult to replace. You will have to lie on your back on the passengers side to get at it. It's very uncomfortable.

Good Luck !!!

Posted on Oct 23, 2008

  • 1 Answer

SOURCE: 95 GMC Jimmy 4.3l W vin rough idle

My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.

Posted on Dec 10, 2008

  • 1 Answer

SOURCE: flickering lights on 2001 Chevy tracker

I had similar problems, with dash board lights and headlights flickering, and the problem was a dying alternator. After I changed it, everything got back in normal. Also, a bad alternator eventually will kill your car's battery, too. I hope this will help you.

Posted on Jan 15, 2009

  • 217 Answers

SOURCE: 1998 Cavalier No Spark in cylinders 1 & 4

ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

Posted on Jan 17, 2009

bschilz
  • 2049 Answers

SOURCE: fuel gauge is erratic. Moves between 1/4 and full

You may have a faulty fuel sending unit and the bad news is, that unit is in the fuel tank. GM has had a problem with these units and many times this has been the fix. Go to Walmart and buy 2 or 3 bottles of Techron. It is an additive for your fuel tank. It has cleaning agents that help remove the sulpher deposits which were corroding some of the fuel sending units in the tank. Run a few tankfulls of this thru your SUV. If your Equinox is out of warranty I would try this before anything.

Posted on Sep 23, 2009

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I have a 2005 chevrolet silverado my dashlights and headlights are strobing how do i fix them?


Are you having problems with headlights or interior lights flickering or dimming for no apparent reason? You are not alone! Many other consumers have reported experiencing the exact same problem. The problem is seen in many different GM makes and models including, but not limited to: Chevy Suburban, Tahoe, Silverado, Corvette, Camaro, Firebird and Malibu's and Pontiac Aztek's.
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I had similar problems, with dash board lights and headlights flickering, and the problem was a dying alternator. After I changed it, everything got back in normal. Also, a bad alternator eventually will kill your car's battery, too. I hope this will help you.

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