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Still looking. Does anyone know if there in a wiring harness that runs through the valley in the center of the engine? I found a big mouse or rat nest in it, but can not see any wire harness. I tore out the fuse box and checked the wires running to the TCM and ECM and found nothing. Is the temp...

Batteries do not have caps. I took them out and had them tested. They passed and the. Charging system is working.

And yes, I have kept all the old parts. The harness looked good and I ohms checked each pin for continuity and placement. They new manifold had two less buttons but information stated the two missing buttons were not needed.

Thank you for your response and pleasure to meet you. To answer your first question. I purchased the trans parts from Rock Auto ( internal harness, internal oil pickup filter, external red filter, pan gasket, and temp/psi manifold. I use Castro TranSynd TES 668 trans fluid. The fluid I dropped...

I have a 2003 Chevy Silverado 2500 HD Duramax 6.6 with a 5 speed Allison transmission, 130,000 miles. I’ve been fighting this problem for months. Three months ago I drove the mentioned vehicle for about two hours and parked it in the driveway like I always do everyday. The truck runs and drives...