I,m replaceing my pcm on a 99 suburban whith a heath gle. It seems that the otc genisys scan tool I have is not capabale of this, do I need to find a differnt scanner or did I miss something?
99 suburban, when I hit the pedel in reverse and only in reverse engine drops to 500 or less and smokes black. This has been happing for over a year some what intermittant but more often then not. Has never threwn a code, didn't find anything with the scan-tool pmd replaced twice. any ideas?