Need some input on a problem I'm having. Little back ground on this. Back before the rebuild on this truck I had a problem with the trans slipping and lock up kicking in and out. At first we went after the electrical side. It had a chip in the ecm when I got it. At times it wouldn't start and found the chip in the ecm was lose. So I removed the chip and replaced the ecm. Truck started fine after that but the trans still acted up. I pulled the pan to find a crap load of Metal shavings. We I did a full rebuild. The trans was full rebuilt and all upgrades were done to help with towing. New trans cooler and lines along with all new gm solenoids.The truck side harness was cleaned up and all re wrapped. It has a new brake switch and tps. Now it's back on the road I'm still having the lock up problem. It doesn't happen any particular time. I've held up and the brake peddle and it will do it even coasting downhill off the throttle. It doesn't do it all the time. I drove it for 2 days with no problems then next day it was doing a constant. It will just keep kicking out and go right back in. Anyone and any suggestions on what to try to pinpoint this problem? Or what wire I can put power/gnd to just lock this up off a toggle? I just want to drive this truck without messing up my new trans. Thanks for any input and sorry for the long read ha ha. Here's the truck.
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