03 Tahoe will not start

Winter means water.try a bottle of heet in the gas tankread directions

try spaying some starter fluid in the in take sounds like it isn't getting any fuel

My tahoe did the same thing it’s most likely the camshaft sensor . It’s easy to replace . It’s under the disturber cap roter button. About $45 from GM. If that’s not it could have jumped time that will be expensive.