You might try a crankshaft position sensor first. Its probably cheaper than an ignition module.
with a mechanic
Need to replace ignition coil "D" for my 2000 GMC Sierra 5.3. Need to know which coil is coil D. Thank you, Adam
cooling system capacity, 1997 gmc 5.7 liter engine
at coil passanger side of engine
It is most likely the pick-up coil "inside the distributor".It could also be the coil or the ignition module.
should b at coil if not its under distributor cap
Follow the wire that comes out of the distributor (obviously not the wires that go to the plugs)
Look on the vehicle emissions control label it is there.
Check your ignition control module, it is located under the distributor cap and your distributor wires connect into. If not this, check the coil again, and maybe even the ECM.
4.3 liter V6 vortec
Based on cars.com the 7.4 liter engine has 295 horses.