Just two different manufactures. I've seen 3 and 4 wire with both type slots.
Just two different manufactures. I've seen 3 and 4 wire with both type slots.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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