I'm with @Polaraco on this about the batteries. MM3 needs 12.3-12.5v consistently or it throws a fit. Drop a high output charger on your truck, return to stock, and try to reflash.
I'm with @Polaraco on this about the batteries. MM3 needs 12.3-12.5v consistently or it throws a fit. Drop a high output charger on your truck, return to stock, and try to reflash.
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