obd2 wiring

good day every one:tiphat I am new in trailvoy.com and looking for your advise :D my chavy 4.2L 2006 cant connect with elm327 BT connector (OBD2) I notice from other thread on trailvoy.com to check the fuse #13 (for lighter ) and its working fine, but when I check the wiring I found the...

the obd2 port not working with chevy 06 4.2 :hissy:... the fuse (cig or ltr) working good i already tried two diff obd2 bluetooth connector but and they give me this note "Can't Connect to ECU ":weird: and already try to connect directly with protocol "SAE JI 1850 VPW" but no luck at all:nono...