2008 Lucerne won't start.

I am not familiar with hybrids, but i think when you start, it's starting with the battery, so I think you have a bad connection, check and clean the battery terminals.

Check timing belt first , check starter also .

If the starter motor is turning the problem may be a broken flywheel tooth. If starter is not engaging the solenoid may be bad or not hooked up but that seems unlikely since starter was replaced. The problem's down there. If solenoid not clicking then problem may be further back.

Is the engine rotating? Is the battery good ? Do you have spark? Do you have fuel

Grab a test light go down to the starter, hook to a good ground and probe the battery cable. If that has power probe the solenoid engage wire( its the little one) have a helper turn the key to start if that gets power replace the starter.

Figure by everything else you mean the radio,lights,etc? Is the engine turning over? What happens when the key is fully engaged? If the engine does not turn over the first place to look would be your fuses. Ensure that none look to be burnt or blown.If so replace and try again.If fuses look good Next step would be to ensure starter connection is good and starter is turning over.If the starter is not turning over then I would focus on it.Hope this helps.

Hi Vernon, There could be a number of different reasons why your vehicle is failing to start. The battery voltage could be dropping during start and become unable to engage the starter motor to turn the engine. You can check this by trying the key with the head lights switched on. If the lights become very dim, you'll need to check the battery, meaning clean the terminals and then try to start with a jump from another battery. If you achieve start up and it fails again the following morning, you will probably need to replace the battery. There could be a problem with the starter relay or a loose contact for the starter motor, most lik3ely the one connecting to the soliniod. It would be good to know some additional information, such as does a clicking sound come from the starter when engaged? Is there a perceptible drop in voltage output when the starter is engaged? does the enine turn at all? Try what I've suggested and if that does not solve the problem answer the questions and let me know anything else which you may think is relevant. Regards John

Without hearing the sound it makes - it's kind of hard to diagnose.

The engine starting process consists of turning the key to start, the starter motor's rotor moving forward to engage the engine's flywheel, and then the starter motor 's "rotor" spinning until you move the key from "start" to "run". You can hear the starter motor spinning - but one usually can't hear the rotor moving forward to engage the flywheel. As a result, you hear the odd spinning sound - which is the starter rotor spinning. The engine never actually turns over because the rotor never engages the fly wheel. If this is the case, then it is very likely that your starter needs to be checked and / or replaced.

Good luck!

Define - It attempts to turn over but won't catch and run ???? When you turn the key to start does the starter engage an spin the engine ? This would be a crank no start condition . If the starter doesn't engage an spin the engine this would be a no crank no start condition . Sorry to ask but i have only been an auto tech for thirty years an have heard a lot of different discriptions for these simple actions . crank no start or no crank no start . Very different diagnostic procedures . So when you turn the key to start , does the starter engage an spin the engine ,but won't start an run ?

Sounds like the starter is bad. The one click would be the solenoid on the starter engaging but the starter does not turn. If it does not click the next time you try to start, then that would indicate the solenoid is sticking. Also ensure that the cable to starter is good and the connections are tight. The starter will have 2 wires. 1 heavy wire that runs the starter itself and a lighter wire that runs the solenoid. The second wire seems good. Also ensure there is not an inline fuse in the starter cable. Some cable incorporate the inline fuse in case the wire shorts out to the chassis.