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I was told the non supercharged versions still have MAP sensors, by my Chevy mechanic. That's being the case the PCM should already have that information. Not sure if it would be a two bar MAP sensor though as it should never go above atmospheric pressure. If we can verify its a two bar MAP sensor on the SS, then it really should be plug and play for sure. If we had someone with a ZL1, and a pre 2013 SS they could easily verify this for us. The 2013 requires the special harness. The 2012 and older should be an easy check. I have googled and can't find the part number for the ZL1 auxiliary gauge pack, nor a cost. Anybody else know?
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