I've got an '03 4L60E in a Silverado 1500/5.3 that is throwing nearly every solenoid code - P0740, 0753, 0758, and 0785. Maybe more if I drive it longer
IIRC it seems to have 2nd and 4th when I test drove it, or maybe it was 2nd and 3rd if that makes more sense...I forget how the solenoids work together for the various ratios.
Anyway it seems perhaps unlikely all these solenoids are bad at once? I'm of course wondering if we're looking at an electrical/wiring/grounding problem of some sort.
I should be capable of commanding the solenoids with my scanner so I was going to check at the plug at the transmission (which physically looks fine and seems to seat well, 13 pin if I counted right) to see if commands are getting that far.
First, I'm looking for switched GROUND, yes? Secondly, is it ok to command each solenoid with the key on, engine off I ASSume? Third, is it possible to damage anything if I command the wrong solenoids or [something]?
edit: I guess the last question is dumb 'cause the harness will be unplugged from the trans....duh
IIRC it seems to have 2nd and 4th when I test drove it, or maybe it was 2nd and 3rd if that makes more sense...I forget how the solenoids work together for the various ratios.
Anyway it seems perhaps unlikely all these solenoids are bad at once? I'm of course wondering if we're looking at an electrical/wiring/grounding problem of some sort.
I should be capable of commanding the solenoids with my scanner so I was going to check at the plug at the transmission (which physically looks fine and seems to seat well, 13 pin if I counted right) to see if commands are getting that far.
First, I'm looking for switched GROUND, yes? Secondly, is it ok to command each solenoid with the key on, engine off I ASSume? Third, is it possible to damage anything if I command the wrong solenoids or [something]?
edit: I guess the last question is dumb 'cause the harness will be unplugged from the trans....duh