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Hi all, I got the new TCM in, OS is a different version than the old TCM. I have saved copies of the old TCM file, the new one blank and a modified version I attempted to build using the parameters...

Hey guys. Have a customers 2009 C5500 in, needs a tcm (soon as the engine warms up it shuts itself down and loses communication, swapped another tcm in after repairing some green wiring...)

I...

If anyone else ever runs into this disabled passlock on the L31 ecm today, caused a flashing security light, removed the evo module, no light and dead reliability for my customer now.

Just saw this reply! The truck is still at the shop. Bought a "new Rockies" module bypass kit. It was a waste. Thinking I may just buy a vin license for this thing...

Anyone?

Ok guys, I've read that VATS can be tuned out of the PCM under theft >g1201.

I have a customer with an intermittent b2947/b2958. Rather than a $250 module + install labor, will turning VATS off...