2004 Other Chevrolet Models my car wont start

Engine Mechanical problem
2004 Other Chevrolet Models 6 cyl Two Wheel Drive Automatic 156k miles

ussually starts on first try, it is an 1500 van,
replaced the battery last week with a big 900 crank amp bat.
tried starting first start motor was turning over a bunch of times,
then nothing when I turn the key lights go on, not even ticking of start motor does any one have a clue
917 681 5189