Set it to ONE SWITCH. I just had it pulled down to show the options.
Set it to ONE SWITCH. I just had it pulled down to show the options.
ZJM861 what was the outcome of your trial?
Posting a question in a thread that has been inactive for 2 years is not likely to get you a quick answer ... plus this thread is needlessly convoluted.
Are you trying to set up a switch to access the Performance mode (Tow / Haul) shift pattern ?
In the computer change the performance option to one switch. Give pin C1‐71 a momentary ground, DO NOT USE A TOGGLE SWITCH. Congrats, you now have tow haul mode.
Edit: Attached my tune file so you can take a look. Notice the "Performance" tables under the transmission tabs, those are for your tow/haul mode, or however you want to set them up. Change Trans>Shift General>General>Perf Option to "One switch"
Last edited by awest623; 06-20-2020 at 12:00 PM.
Here's a picture of my setup. Just a cheap momentary switch from Advance Auto. Grounded one pin a bolt under the dash, the other pin runs to the input on the PCM.
Capture2.jpg
Last edited by awest623; 06-20-2020 at 12:14 PM.
1998 GMC K1500 Z71
* L31 350 Vortec
* AUS 43lb injectors
* Comp 08-410-8 with 1.6 rockers
* P59 swap
* Whipple supercharger
* JBA headers
* AFR 190cc heads
* NV4500 swapped
* Cal-Trac traction bars
* 1" blocks, 265/70r17 BF Goodrich KO2s, 17X8.5 ALPHAEQUIPT COMMAND LT