This is just a quick reference post, as someone may need this info (now or in the future).
For the benefit of new owners, and others who’d like to see it, it is shown below.
This would be the correct stock ECM chip for a 1986 Buick Turbo Regal (any variety).
The top of the chip says:
At the top: DELCO
Middle: CMW 0602
Bottom: other numbers (but you need to remove the chip from the carrier to read them)
[ CMW 0602 is the important number here ]
The bottom side of the chip (that actually touches the ecm) has no info on it.
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