1997 buick lesabre will not start/turnover, battery is good and all lights and instrument cluster work fine, wiring to the starter good, starter and selenoid good, any suggestions

need more info does car turn over?

check fuse if good cluster bulb burn ,remove cluster instrument and change bulb that are burn

The car start and run OK? Sound like a electrical instrument cluster problem. You will need to take off in order to check harnesses and ground wires connections.

Its a fairly simple system. The alternator gets a signal from the circuit for the warning light and-or gauge to activate the voltage regulator inside the alternator. The large wire between the alternator and the battery or starter is fused for protection.
Could be a problem with that circuit back to the instrument cluster, or the circuit to the battery, or a ground connection. You could also have a second defective alternator.

Park neutral safety switch , try moving gear selector to neutral . If that doesn't let it start ,viewing wiring diagrams an testing the starter electrical circuit's with a DVOM - digital volt ohm meter .
How to voltage drop test starter motor circuit
Electric Testing Techniques You Need to Know

Learning the correct way to test will avoid hitting those walls .
Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on engine ,then under subsystem click on charging . two diagrams , one is the starter electrical circuit . Click search button then the second blue link. Is the security light lit on the instrument cluster ? This will keep it from starting .

you might need to clean your battery terminals first and if that does not work, then go have your starter tested to see if it is the selinoid, that is going bad.

bad battery connection or bad starter,or blowen fuasble link

Check the starter and wiring coming to it.
Try to move them a litle to see if they are tight enough. Starter location you can find for free at
Autozone website.
Good Luck

You might want to have your ignition swith replace. It could be bad wiring

Possible ground wire fault with dash board unit. If it is a cable operated spedo, the cable end (small square cap) may be rounding off on one end.