Performance Shift/Normal Shift - 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 01-10-2007, 06:47 AM   #1
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Default Performance Shift/Normal Shift

Hi guys, ive got a question thats been bugging me for a little while.... on the 92+ theres performance shift/normal shift buttons on the center console and i realized that franky doesnt have them (*cough*randy*cough*)

now do these buttons have wires that run to the ecm or do they go somewhere else? because i was thinking of adding them in somewhere but i dont have a 97 fsm so i dont know where the wiring goes.....
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Old 01-10-2007, 07:51 AM   #2
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Mmm Randman grabbed his 97 electrical book.

I believe these do run to the PCM, however... my butt o meter can't tell the difference in the two modes.
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Old 01-10-2007, 09:16 AM   #3
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Without the switch, it shifts in Performance. In Normal shift, it retards the shift from the PCM default. Most can't tell.

All it does is switch a resistor into the circuit across two pins of the PCM.
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