What to do if cylinder misfire on GMC Vortec?
What to do if cylinder misfire on GMC Vortec? If there’s a chance you know somebody who’d trust you with their scan tool, get your hands on it and look at that misfire counter to see if you can narrow down a particular offending cylinder. If that same scan tool has the counter, it should also have the injector kill test. You can use that as your cylinder contribution test. What are the symptoms of a failing Vortec distributor? Symptoms of Failing Vortec Distributor 1 Engine misfires 2 P0300 to P0306 engine codes (for misfire) 3 Engine is slow to...