Dual Batteries
06-11-2006, 06:02 PM
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Dual Batteries
Anyone Install the dual battery option on their truck? I don't know the RPO code for it but would like to add a second battery and for some reason they are not aval on the Crew Cab for some reason. I'd like to know if they BCM or PCM needs to be reprogramed for this? Also what part numbers are the tray and wires? Where does the second battery ground? Really looking for the OE setup and photos if anyone has them.
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06-19-2006, 06:43 PM
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The following post has part numbers and a few pics. The only thing missing in the part numbers is that gm has a 125 amp mega fuse from the battery to the relay. I know it works for 99-04 for sure.
https://www.performancetrucks.net/fo...d.php?t=365237
https://www.performancetrucks.net/fo...d.php?t=365237
06-19-2006, 07:21 PM
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Sweet write-up. I may put a second battery in my Yukon. Why cant you just install the holder, ground it right there, and run a 4 gauge over to the Battery/Alt box and tie them together? Why all the relays and such?
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