On my 2006 buick lacrosse - the speedometer registers way ahead of the actual speed. Just say, if I am traveling at 40 miles per hour, the speedometer registers 70 or 80 miles per hour.
Sounds like you need to replace your speedometer cable that runs from your dash to your transmission.
SOURCE: 2004 Buick Lesabre speedometer not working
Yes it's on the right side othe transmission just above the passenger side cv axle. You most likley need to send the cluster off and have it checked. Model Electronics in NY.
SOURCE: 2006 buick lacrosse how to replace headlight low
The bright light fitting is the same as the dim so take it apart fist to see how the cover screws off/on and the light comes out. Both the cover and the bulb are removed by a standard twist to the counterclockwise and replaced by a twist to the clockwise. Now to the dim light. You have to release the entire light assembly before you can remove the screw-on cover to reach the light. On the rear edge of the light unit closest to the engine is a white locking tab. Pull that tab up just to the point where it releases…pull too far and it locks again. Next, locate the other locking bracket which is a metal bracket in the center-rear of the light assembly. This bracket is held down by a screw. Remove the screw with a 10mm wrench. Lift the bracket just like you did the white bracket. You should now be able to pull (or pry) the entire light unit forward a little. Depending on the size of your hands this might be enough. If not, then you need to release the plastic bumper assembly to give you a little more space. This is done by removing two expansion locking pins, one that holds the little plastic strip down between the bright and dim lights and one that is located inside a rubber bumper on the engine side of the light unit. To remove these locking pins, pull or pry up the little tab in the center of the pin just like you were pulling a nail by the head. That should give you a little more space.
SOURCE: programing instructions for buick 2006 lacrossekeyless remote fob
Transmitter ProgrammingImportant:
All transmitters which are to be recognized by the remote control door
lock receiver (RCDLR) must be programmed in a single programming
sequence. If the system is placed in program mode it will erase all
previously programmed transmitters upon the receipt of the programming
signal from the first transmitter. Up to 4 transmitters can be
programmed. Do not operate or program the transmitters in the vicinity
of other vehicles that are in the keyless entry program mode. This
prevents the programming of the transmitters to the incorrect vehicle.
Good luck
SOURCE: change headlight 2006 Buick LaCrosse
The bright light fitting is the same as the dim so take it apart fist to see how the cover screws off/on and the light comes out. Both the cover and the bulb are removed by a standard twist to the counterclockwise and replaced by a twist to the clockwise. Now to the dim light. You have to release the entire light assembly before you can remove the screw-on cover to reach the light. On the rear edge of the light unit closest to the engine is a white locking tab. Pull that tab up just to the point where it releases…pull too far and it locks again. Next, locate the other locking bracket which is a metal bracket in the center-rear of the light assembly. This bracket is held down by a screw. Remove the screw with a 10mm wrench. Lift the bracket just like you did the white bracket. You should now be able to pull (or pry) the entire light unit forward a little. Depending on the size of your hands this might be enough. If not, then you need to release the plastic bumper assembly to give you a little more space. This is done by removing two expansion locking pins, one that holds the little plastic strip down between the bright and dim lights and one that is located inside a rubber bumper on the engine side of the light unit. To remove these locking pins, pull or pry up the little tab in the center of the pin just like you were pulling a nail by the head. That should give you more space.
SOURCE: The speedometer on my 2004
It could be a bad connection in the wires between the speed sensor and the Engine Control Module (ECM). Is the ECM setting a speed sensor code? It could also be a bad Instrument Panel Cluster (IPC) module. Are there any codes in the IPC? It could be a problem with the data line between the ECM and the IPC, in which case you will be getting "U-codes" out of your ECM. (U-codes indicate communication problems between the various modules in your car) A good scan of you vehicle's computer systems would be the best place to start.
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