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GM 8 speed programming: TUN and PUN
Posted to Technical Discussion Forum on 6/25/2020 19 Replies

Hello all,

I've programmed many of the GM 8 speeds but up until lately they've all been GM remans with a nice new TUN sticker.

Now we're starting to see these being replaced with aftermarket remans. The problem is these units usually have a TUN sticker tha... Login to read more.

19 Replies Received (View Replies)