I need to know more about the cylinder 5 starts to die when the a.c. is on.price

I was told I needed a coil pack. Now that was without getting it looked at. It started from turning the air conditioning on. Then it would stull. Have any idea what a coil pack would cost. Thanks for the information.

There is only one ignition coil on the 4.3L engine that services all 6 cylinders equally .. Therefore that can't be the problem! .. I could post a list of the possibilities but that doesn't help .. When I get this type of problem in at the shop the first thing I do is a FULL scan test with a high dollar scanner which includes cylinder misfire counter .. Then I proceed with applicable testing to prove what is causing the misfire so repairs can commence... That's just the best route to take instead of guessing at it. https://repairpal.com/repair-shops