There are just some days I wish I didn't turn wrenches

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Happy days are here again. Finally got the 8 ignition coils, Genuine GM, late this afternoon. I will be installing them tomorrow morning, firing up the engine, topping off coolant and monitoring, 2 road tests and recheck fluid levels, pressure test cooling system and get my final money from the guy and deliver the Denali. I got a check from him today for $1777. He is paid up to today. Whatever tomorrow's labor is, he owes me for that. Will be glad to have my parking spot again.
 
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Installed all 8 coils, plugged in and attached plug wires, topped off coolant, pressure tested and found no leaks/pressure bleed off, started engine and let warm up, I use a large fender cover to block air flow at radiator to get that thermostat open asap, coolant burped and refilled and pressure tested again, no leaks, road tested 2 times and gauges all normal, check all fluid levels and for leaks, no problems. Installed engine covers and wiped down engine compartment.

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He asked, "What would yo do if was your truck"? @Fless, you should know by now, if coils are OE at 136k miles and especially if is something I just bought, I change them. Especially with OPM.
 
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I should think about replacing my coils... But at 370k estimated miles... And they are still factory!
These are easy enough to replace, even if on a trip. But, IMO, they work with the plug wires and recommended replacement time for wires is the same as plugs, at 100k miles. Ignition coils can and will weaken over time, even if never setting a misfire code, but when I think of a weak spark and fuel waste and the damage that fuel like that can do, I replace 'em. Afterall, I am a thousandaire.
 

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