Hmm interesting. I was reading through some topics in your forums and I ran across something that was posted by one of your technicians.
Malfunction indicator lamp (MIL) on, trans stuck in 2nd or 3rd gear, instrument cluster inoperative (diagnose & replace ignition switch
if necc). See bulletin #01-07-30-002. Techs in field report IGN switch failure is common & may cause multiple symptoms with trans, IPC or other IGN feed circuits. (DTCs) P0740, P0753, P0758, P0785, P1860 may be set.
Most likely cause of this condition may be a loss of power to the transmission on circuit 1020.
To verify, with the ignition switch in the run position, test for battery voltage at the appropriate fuse listed below.
1997 s/t trans 24
1998-2003 s/t (old style) cluster 11
2002-2003 s/t (new style) ignition 0
1997-2000 c/k (old style) trans 20
1999-2003 c/k (new style) ignition 0
1997-2002 g-van trans 20
2003 g, h-van ignition 0
2003 H2 ignition 0
After IGN switch replacement, VTD (theft deterrent) relearn must be performed "
I took my jimmy to a transmission shop yesterday and they got me worried because they looked at the codes and said its not the solenoids I need to change but its an internal problem and that I would need to get a new tranny. Then I ran across that forum response and it got my hopes up that its as easy as changing my IGN switch. So are the transmission guys BSing me?
Sunday, December 6th, 2009 AT 9:56 PM