not getting fire on 5.3l

[Alderson95]

i have a 02 tahoe 5.3l vortec 4l60e trans 2wd. i had gone out this morning to start the tahoe and it wouldnt start. i checked the fule to make sure that it was getting fule it was. so then i checked the fire nothing i hocked a test light up to it and a timing gun nothing. i have checked all the fuses but nothing it just seems odd. if anyone has any ideas about what it could be i would greatly appreciate any feedback.