05 4.3 to 04 6.0 with segment swap...starter wont stay engaged
#1
05 4.3 to 04 6.0 with segment swap...starter wont stay engaged
Hey guys, I've got a 2005 v6 5 speed rcsb that i swapped in a 2004 6.0 and t56. I used hptuners to segment swap in a 05 express 6.0 tune to my p59 v6 ecm so I could keep dbc. When I go to start the truck - the starter turns over for like a .5 second and quits. Seems like something is killing the signal? I'm not sure whats up, I don't have a scanner to check the crank request and such until Tuesday. I'm leaning toward it being in the tune? not sure. Any help? TIA
#2
Found the problem. Was in the tune. I had to go into the system options and turn off the crank low res. After this the starter stays engaged correctly. Now I have a battery light on the cluster, but the system is charging just fine. I'm not sure how to go about this, but my 05 v6 harness had a generator battery control module on one of the battery cables. After following the schematics it appears this is what sends serial data to ipc to turn off/on the battery indicator light. Any one have any ideas on how to remedy this without wiring back up this GBCM?
#3
100% Redneck
I had a 2005 Escalade harness I was going to use in my swap that had the GMBC. I've read where the alternator defaults to a constant 13.8 volts when the GBMC is deleted. The GMBC box is located on the ground cable and that box has a connector plug that connects to the harness. I'm guessing the 04 harness has no GBMC connector? Is the alternator a 2 or 4 pin?
#4
The alternator that came with the 04 harness and engine is 4 pin but only 2 wires are going to it. They are gray and brown. The alternator off my 05 v6 is 2 pin and a different connector. You are right about 13.8 that's what I'm charging at. Think there is a way to fool the cluster into turning off the battery light? Or am I going to have to wire up the gbcm? If I end up wiring it up...do u think ill have to swap alternator and the connector as well?
#5
Alright...got the battery light out finally. Had to use the v6 ground cable that had the gbcm installed on it and then run 7 wires to make it work. 2 powers 2 grounds purple to ecm grey to alternator and orange to c100 for serial data. My swap is up and running just needs a good tune.
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