possiblly the starter or fuel pump is out.
Check battery earth connection.
how to start a 1993 chevy tahoe without a key
More than likely a direct short circuit.
There can be many reasons why a 1997 Chevy Tahoe will not start after sitting for three days. Reasons include a dead battery, a bad starter, a bad alternator, a loose wire, and no gas.
Turn your key to the run position without attempting to crank. Leave it in this position for about 10 seconds. If your Tahoe is equipped with the battery meter, let the meter reach its peak. Then attemp to start.
If it's a 5.3 about 6 with a filter change. Start with 5.5 and go from there.
Does it have fuel, spark, compression?
There is a good chance that your battery has a dead cell. It will act like a good battery of you start it every so often, but if left overnight, it dies.
Maybe your fuel pump
do you mean it cranks, but will not start?
Seized Engine? Flat spot on starter? Bad Starter solenoid? Loose or corroded battery cable? Bad ignition switch? Bad neutral or clutch safety switch?
Dead or weak battery?