PCM Diagnostics & Tuning - were is the computer



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chevy11.6
10-23-2007, 08:22 PM
i have a hypertech max energy chip. It just changes shift points/firmness. You do it all on your computer then you plug it into the cars computer. Where exactly is the carss computer. i dont no where to plug it into

foff667
10-23-2007, 08:31 PM
on LS1 fbodies its under the hood on the pass side.
chevy11.6
10-23-2007, 08:41 PM
does any1 have a picture ...is it marked by anything i dont get where to plug it in

cherryelky305
10-23-2007, 08:52 PM
What do the instructions say to do? It probably plugs into the OBD-II port. If not you need to unplug the PCM from the harness and then plug it into that.
chevy11.6
10-23-2007, 10:06 PM
there are no intstructions. it just has acrazy looking plug that is suppose to plug into the cars computer
BigBirdTA
10-23-2007, 11:26 PM
On LS1's last I knew (long time ago) the Hypertechs plugged into the OBDII port. its under the dash, right next to the steering column.