How do I replace a starter in a 2000 Buick regal

could possibly be
to get the correct firing, order in your browser page search bar type in- firing order for dodge regal -- and you will get pages and diagrams to help you get it right

disconnect the battery, then at the starter disconnect the electrical wires on the starter then the 2 bolts that hold the starter to the engine/transmission.

is this sensor bad? if not dont replace it

Your 3800 Regal should not create any additional work to remove/replace the factory starter...Ask your parts store to show you one...be sure to disconnect one side of the battery prior to any work around the starter...Should be just 3 bolts (plus 2 wire conncections) for the switch out...Hope this helps.

no, but it does have one for turn signal and hazard

buy the starter, and use it to find the old one usually only takes 20 to 30 min, i did it in 110 degree weather and it was my first time ever doing it

when it doesnt start check for fuel, may have fuel pump or relay going bad.

Check your Neutral Starter Switch my 95 Bonneville had same symptoms and i replaced the Neutral Starter Switch and it started like a champ

If you turn your key forward (And make sure the fuel pump kicks on) Cross the starter terminals with a screwdriver. If the car starts like this you have a bad ignition. You can replace the cylinder or the whole column.