does the engine turn over,but wont start?
tell me all you have tried.
tell me how and when this problem started happening
so,the engine will turn with the starter,,,right?
you will need to check a few things
1st,check one of the the plug wires to see if you have a spark...if not,check the coil wire that plugs to the distributer,,if you have a spark on the coil wire and not the plug wire,,replace the distributer cap and rotor[it is best to do a complete tune up all at once[new wire,plugs,rotor and cap].....if you have no spark from the ignition coil,you may need a new ignition module[auto zone and most parts stores can test these]
if you do have a spark at the plug wire,you need to check the fuel pressure,,these vortec engines must have no less than 60psi at all times,even while turning the starter,,,if the fuel pressure is low,you may need to replace the fuel pump[a weak fuel pump is a common problem]
Test Description The numbers below refer to the step numbers on the diagnostic table.
Notice: Do not allow the fuel pressure to exceed 517 kPa (75 psi). Excessive pressure may damage the fuel pressure regulator.
The Vehicle Control Module (VCM) has integrated IC circuits that are fault protected; therefore, if a circuit has failed, the integrated IC may not be damaged. If that is the case, the IC will keep the circuit open until the fault in the circuit has been corrected.When the fault has been corrected, reinstall the VCM and check the circuit. Replace the VCM only if the circuit is still inoperative.Test Description The numbers below refer to the step numbers on the diagnostic tables.
Engine, RH Side
did you get it going?do you need more help?if so.let me know