Posted By: Administrator 1 Flag Post For Monitor Review
Shop: Mitchell 1 Admin
Date: 6/11/2007 2:58:06 PM
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
Also, GM has a bulliten out about thier connectors, you may need to have a look at the cluster connectors and pins, ceck for bent or pushed out pins in the plugs. Perform a relearn on the key first, maight save some work.
Have you done a relearn on the pass-key?
GM PASS LOCK RELEARN- Ignition to "run" position, try to start and let key return to "run" position
Approx ten minutes security light will go off
Turn key "off" and wait 5 seconds
Repeat 2 more times for a total of 3 relearns.
Turn key off, then start it
Saturday, August 22nd, 2009 AT 4:28 AM