Could be ! could also be the blower motor is bad or blower motor control module .
Does you buick have manual or automatic climate control ? There is a fuse box under the rear seat ,that is where fuse is for blower motor .HVAC BLWR fuse 40 amp. Chevy Trailblazer EXT Blower Motor Won Turn Off
SOURCE: 1992 BUICK LESABRE LIMITED, NEED FUSE BOX DIAGRAM
the fuse is in panel with other fuses,however it will say a\c instead of heater. You may want to use a test light to check for voltage at the blower motor plug. To see if current is going to the fuse. Check the other fuses too. since they are linked in parallel to the the acc auto climate .
SOURCE: 2001 buick lesabre. my heater and a/c blower is not working
I believed the a/c blower is a relay activated. So no fuse getting blown to make it to go bad. Try to locate such relay (the ID label is found inside the relay cover assembly). Swap it with an identical one before making a trip to auto part store.
SOURCE: 2007 buick lucerne has water leaking into the
Remove trunk trim and covers , close trunk and wet car now look for leak source.
SOURCE: How do you jump start A battery on the 2007 buick
Very simple.
First hook up Positive Red and Negative Black terminals to the battery in the known good car. Then hook the Red terminal on the opposite end of the jumper cables to the positive Red terminal of the battery in the known bad car. Then, carefully, without shorting out the connectors, connect the final black jumper cable to the 'frame' of the known bad car.
Hope this helps.
SOURCE: My 2007 Buick Lucerne drivers
first purchase the door handle assembly then remove the door panel. make sure the window is up and reach in and disconnect the rods making a note of which one goes to which one. unbolt the door handle and remove. the new door handle may come with a new rubber seal for it. position over new handle and reinstall. make sure to search the door panel for hidden screws holding it on before you pop the clips.. hope this helps
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