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A Niche Topic: Early GM LS DBW

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If it's not really about tuning or wiring. Then it belongs in here.

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Hi guys, not sure if this was the correct spot for this post but it seemed the most fitting so here I am. :)

The backstory behind this post:

I'm in the middle of going from a turbo setup to a supercharger setup (roots style, Magnuson kit) on my '01 Silverado. There was never any support for the 99-02 Silverado/Sierra trucks with the new TVS1900 kits they sell, but coincidentally the '03 trucks are basically a mirror image of the 99-02 with the exception of the change from the P01 to the P59 ECM and some other miscellaneous changes. So, the superchargers can be installed on the earlier trucks since they are mechanically the same with custom tuning required but I have that base covered. Some 00-02 trucks come DBW and if I had one this post wouldn't exist, so that leads me to the next part of this post.

The problem:

With no real experience with proper fabrication and an absolute need for "just the right look," I've made the decision to attempt to convert my truck to DBW instead of making an eyesore of a bracket for my existing throttle cables. This is fairly straight forward for me, though sourcing all the parts for the 00-02 truck DBW system, specifically the throttle body, isn't exactly easy to do. On the 99-04 Corvette DBW cars, the LS2/3 throttle body is a common upgrade with jumper harnesses to support the swap. LS2/3 throttle bodies are a dime a dozen in comparison to the early truck models.

The question:

Based solely on this diagram and the info found over at LS Engine DIY, is it possible to simply combine the two 5V reference and Low reference signals from the 8 pin TAC module connector to an LS2/3 style 6 pin throttle body? The 99-04 Corvette TAC module doesn't use the two additional references and the swap is compatible, but that module would also require a Corvette OS and pedal.

Attached are the diagrams for both systems.

Thanks in advance and Happy Birthday to HPA!

Attached Files

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