DTC 31....don't ignore - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-18-2004, 09:12 AM   #1
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Default DTC 31....don't ignore

Just some FYI for folks with a DTC31. Don't ignore it. It'* probably just a loose PRNDL switch (sits on transaxle toward back)....but if the switch is defective, it will slightly alter your idle and it puts the trans into D4 mode regardless what gear you select(other than reverse). It'll still shift normal, but can't be held in a gear....and your reverse lights/cruise control won't work properly.....so for $80 just get a new one!
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