I read another post somewhere that said that the LS1M seemed to work with the RL. It's plausible, because I think the RL is still J1850. Not sure whether the Cobalt is J1850 too or if it's moved to CAN yet. It would really surprise me if the high-speed side is still J1850, and if it's CAN, it's for sure a no-go.linenoyz said:I tried hooking up my LS1 scanner to Katie's LSJ...didn't seem to read anything. However, I know any OBD2 scanner can read the basics.