Speedometer needle flops wildly back and forth as soon as I start the engine and before car is put into drive. Once car is in motion the needle is either all the way to the left or all the way to the right. while driving it will go to the right and left intermittantly. Never works properly. .
Could be a bad cable. If it is broken into, you'll get swings like this. If you are handy, you can replace it yourself. If not, most garages can do it for you.
SOURCE: 1995 Buick Park Ave. Brake light remains ON and chimes on driving
The problem is the car think the park brake is on (intermittently). I would check the park brake switch, perhaps it's loose, or perhaps the park brake is pushed down to the first "click" spot. Also check the wiring connection to the switch, and the wiring nearby. Good luck!
SOURCE: 1997 buick lesabre has intermitant speedometer/odometer
Sounds as if it may be an instrument cluster issue. Check the plug at the cluster, if it is ok then travel to your nearest GM dealer and ask them to see if there is a software update addressing your issue. They will likely charge you a diagnostic fee, but it will be cheaper than throwing parts at it in the long run.
SOURCE: Buick Regal 2001 LS dashboard lights flash off and on
It turned out the ground wire to the battery was loose, Evidently, it loosened up when driving so mimiced the earlier symptoms because it connection was sporadic. I hooked up to a computer to verify after connection tightened and it came away with no errors or problems.
SOURCE: I have a 2000 buick lesabre. The fix engine soon
It NEVER was the camshaft sensor! Unless, you've removed the engine lately, which I doubt.
RUN to Advance Auto Parts and buy a can of "SeaFoam" and add to your gas tank per instructions...drive at least 100 miles and the problem should go away...IF it doesn't you'll have to replace the O2 sensors in the exhaust system...Any good mechanic should be able to do this for much less $$ than the dealership DO NOT go to the dealer for repairs!
Good Luck
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