when turn the key, only the lights turn on.
why my chevy venture 2004 does not start, only turn on all the lights? on 2004 Chevrolet Venture
Even though the lights come on the battery may not have enough power to start the car. Try jump starting the car and if that don't work the starter may be bad. Depending on you automotive skills you can check for 12 VDC at the starter before replacing it if thats the problem or you can take it out and have an auto store test it for you.