I have a 2001 chevy silverado. It won't start. appears to be getting fuel (i can smell Gas) it has spark ( an orange spark, regular sequence) cranks over fine (new battery)

If your Injectors has a fuel during cranking your engine, check your spark plugs if it is wet dry it up, or change it by new ones. Then crank it again.

number one thing to do , are you getting spark , pull a plug wire at the plug side and put the screw driver in the hole in the wire off and hold it to ground have someone crank it over a few seconds and see if you have spark , if you are getting spark then you are not getting fuel you have to ck you fuel pressure should be around 40 lbs , but some cars vary but it is pretty high you can ck online for the right pressure , also ck your air filter believe it or not I seen some cars not start because of a dirty air filter . let me know how you make out

Do you have normal fuel pressure and spark ?

gas? diesel? if its a 6.0 gas they have problems with the crank sensor. check for fuel pressure and spark. read the computer codes. probably crank sensor or fuel pump

Diesel or gas? Cranks but doesn't start?

You need to find out if the fuel pump is working, getting gas up to the engine.
If the pump is working and seen to have good fuel pressure, check ignition by checking for spark.. To work, the engine needs, you know, gas, air, spark, and compression. Why people say, check for gas, check for spark.

try checking the crank sensor. if a crank sensor goes bad or is damaged it will not allow the plugs to fire but you should still have fuel pressure. also check all connections.

Try changing the crank sensor or coilpack.

Possible weak spark from ignition coil or low fuel pressure due to weak pump. Try spraying carb clean into intake throttle body when problem is present. If vehicle will start and run with a little spray then fuel pump is failing.

sound like the spark plugs arent firing hot. try replacing them, if still a problem it could be distributor. start with plugs, they are cheaper