It's pretty amazing the reach that First Brands had. This is the first time I've seen "out of stock" on a few different sites for popular blue AC Delco filters. Inventory on the remaining ones has been hit or miss.
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Supposedly GM's new supplier(s) are ramping up production and popular filter "new supplier" filter models now have A/B/C designations depending on the product line and supplier? Like PF66A, PF66B, PF66C. A is their silver/advantage (budget, white filter/box) line, B is AC Delco Gold (black filter/box), and C is OE/Genuine GM (blue). Nothing like muddying the waters for the DIY mechanics.
I haven’t gotten the engine broken down yet to determine exactly but I do know the cam is done and there was misfire in 2 cylinders. While driving; check engine light blinking, stabilitrak flashing on and off and the oil PSI jumped to around 55-60 PSI. This of course after I had to deal with the 8L90 shudder that the dealer couldn’t figure out so I fixed that.
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If I keep the truck a built L8T is replacing the L86. The DoD/AFM kills these engines.Â
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