My 1998 chevy cheyenne 1500 4Wd 5.7 wstalls out and dies when outside temperature is above 70 degrees....
you should put a cooling fan in the engine compartment. It may be too hot
it has a cooling fan and it works. :) thinking something electrical???
does it come back to life with a restart or wait for cooldown?,sounds like cooldown wait,ok Ive experinced a CPS failure when hot on a few, a hot coil ,meaning dead when hot? cps a crank position sensor
Agree with jimmy
will add, possible ignition module breaking down when hot
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