Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum - View Single Post - Pcm issues? Or connector? Need help
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Old 12-19-2018, 05:19 PM
John in RI's Avatar
John in RI John in RI is offline
2005 BowTie TrailBlazer LT
Olympic White '50U' 4.2L I6 4X4
Join Date: Aug 2018
Location: Greene, RI
Posts: 104
I don't know if that stuff all shares a common ground or not, but it seems like to many various sensors/circuits to be "+" voltage related to me. I'm guessing a ground problem. Re-check the harnesses to see if you forgot to re-install a previously removed ground wire somewhere; re-check the negative battery cable connections too.

Might be a poorly fitted PCM connector too.

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