Fyi, coils rarely fail on older systems. I have been doing this for a long time, and I have seen less than 10 regular oil filled coils fail in 40 years. Now the new coil on plug stuff and the air cooled GM crap from the 80s is another story. I change the Ford and Chrysler coil on plug crap all the time. Just to be fair I haven’t worked on any new GM stuff in 14 years.
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02 Saturn L200 5 speed- 265k miles
84 Gmc 6.5 na diesel K30 4x4, TMU
2006 Lincoln Navigator, 215k miles
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