MidRebuilder

Losing my head. I have a generator circuit code on my truck after tuning. (Thanks for the help on tune advice CamGTP). Problem is, it won’t let me do the crank relearn after tuning due to the code. I’ve measured the power wires up to the dash, and I have the same voltage that’s at the battery. The battery gauge reads well too. Yet it throws the battery light and stores the code in the ecm. Does the dash having that light automatically throw the ecm code? Are the ecm and dash tied together like that? For what it’s worth, I’ve swapped the alt, and checked my grounds. Battery is good. Is my ecm done for? Is there a way to test that? Or is my dash acting funny? The truck was swapped from auto to manual and has been tuned accordingly. Any input is greatly appreciated. We finally have good weather out in my neck of the woods and I’m desperate to hoss around.

I would like to add that the truck runs great while driving, it’s just when idling. It also likes to kill itself when turning at idle. I’m sure this is due to parasitic draw from the PS pump

I just finished up an NV3500 swap on my truck. Jumped the NSS and went for a cruise! She’s got a refreshed 5.3 with a nice streetable cam. Man does she scream! However, on idle, she likes to “hunt” for return to stable rpm after slowing to a stop. Is this due to the ECM not being tuned to think it has a manual transmission? The truck was tuned with the cam when it had an auto, would that tune need to be scrapped in order to run right with the manual? First foray into tuning and I’m a little lost in the concepts.