RichBoost

Ive been confused on what harness to get for my swap. Swap is from a 2006 Express 2500 van. 4.8 with 4L80 and it came drive by cable and has green/blue connectors. Its my understanding that the vans are the only ones in this configuration. All of the DBC harness have red/blue connectors but my pcm is serv #12589462 hdw #12589161. Should I just buy the red/blue dbc harness? Is it just as simple as switching out the red cap for the green one i currently have on original harness? I tried to make my own standalone harness but Im having trouble and want a simple solution that i can afford. Any input would be helpful. Thanks

ls1nova71

iTrader: (4)

Just use what you have, its the same as a DBW harness with the exception of the DBW wires versus the IAC and TPS wires on the DBC one. You can use the pinouts for the older red/blue harness to make it stand alone, they're basically the same.

ryeguy2006a

iTrader: (27)

Stick with the P59 ECU. Some would argue that they are even better than the 0411 (red/blue) ECU since they have faster processors and have a wider variety of factory tunes. They are also able to run flex fuel and 3 bar Map sensor. Check out lt1swap.com for the pinouts.