[AtomicVette]

Just finishing up a motor swap 6.2L into a 5.3L 2008 Avalanche. Wiring harness and ECU are all from the truck. Just swapped over the engine.

When I turn the key to the "on" position the "Powertrin Relay" in the main under hood fuse box just clicks constantly. Turn to "Start" position and get nothing.

I've searched here and google, and not getting much info.

 

[AtomicVette]

If anyone runs into something similar in the future. The issue with this was that the harness ground up by the left head wasn't hooked up. (oops)