Cbutler454
Newbie
1997 K2500 454 4L80
I am not getting TC lockup in any gear. When connected to truck with scan tool it doesn't show TC lockup as command "on". Always "off". Have checked brake switch reading in transmission section on scan tool and switch goes from closed to open when pedal is depressed. Engine and trans both show to be getting up to temp via scan tool. What other inputs does the ECU use to determine the TC to lockup?
(Pic of problem child attached for attention)
I am not getting TC lockup in any gear. When connected to truck with scan tool it doesn't show TC lockup as command "on". Always "off". Have checked brake switch reading in transmission section on scan tool and switch goes from closed to open when pedal is depressed. Engine and trans both show to be getting up to temp via scan tool. What other inputs does the ECU use to determine the TC to lockup?
(Pic of problem child attached for attention)