Your 2001 LeSabre is rated at 20MPG City/29MPG Highway. I've found this rating to be fairly accurate. I average 20-22MPG when I'm not using the A/C and have measured highway mileage at just a shade under 30MPG. Pretty good for a big car that has a little pep.
Replace axle on 2001 buick Lesabre
The 2001 Buick LeSabre's fuel tank holds 18.5 gallons as found on http://consumerguideauto.howstuffworks.com/2001-buick-lesabre-3.htm
where is the pcv valve located on a 2001 buick lesabre
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Cost on replacing ball joints on a 2001 Buick lesabre
The PCV valve for a 2001 Buick LeSabre is located in the top of one of the valve covers. It is a plug in unit and is easily changed.
its under the back seat
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What size speakers go on the rear of a 2001 Buick lesaber
It has a chain.
The socket size for the trunk tail light on a 2001 Buick LeSabre is 7mm. Bulbs can be purchased at most local automotive repair stores.
The battery is located under the rear seat cushion on your 2001 Buick Lesabre.