2000 Blazer shut down while driving

My friends 2000 Blazer shut down on him while he was driving down the highway just came back from getting his truck inspected and just died so i checked it and it has good fuel pressure and it has spark i checked all the fuses and all good so i tried a crank sensor and still wont start i just took the plugs out and all fouled with gas so going to get new ones and see what happens, if anyone has any idea what it could be i would appreciate any info thanks EZFrank

Just noticed cap and rotor look kind of shot even though it is getting spark i changed cap and rotor and new plugs and started right up so good to go now hope this helps any one. Ezfrank