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Hello everyone I been building a 2006 h3 ls swap for almost a year now for my wife and I’m learning how gm is a real pita with there modules cooperating together! I have a 4.8l 58x timing 07 wiring. I have an 06 h3 that was a e40 pcm with 24x i5 motor! In 08 they came out with the alpha 5.3l with e67 58x timing. They 06 and 08 both use class 2 serial data to communicate except 08 added high speed data bus to communicate with the tcm a t42. I had a e67 calibrated to the 08 alpha h3 and the vin from the 06 h3 which is the chassis. And now it’s communicating with the bcm any ideas to help me I would greatly appreciated for I’m lost at this point! I put the schematics down below 2006 h3 2008 h3 the ecm calibrated to
Lets make sure we get this right - you have an 58x LS engine which will be controlled by an E67 ECU which you have already had programmed to the engine and your VIN. Correct ?
Plenty of people connect an E67 to a T42 with an aftermarket or home-made harness without a BCM. Google "how does e67 ecm connect to t42 tcm".
What is NOT clear from your first post, and likely the reason noone has replied, is "What is your problem?". :What is not working or concerning you?" Also your 2nd diagram is not readable.
Am I correct that you assume the ECM and TCM both need to be connected to the BCM? And that your BCM does not recognize these non-stock components?
Some people get around such problems by using aftermarket gauges which don't need to the BCM to work properly.
If your H3 has E40 wiring and associated BCM, the E67 is not going to work with it. The easiest thing to do---if you want your gauges, accessories to work, is swap the reluctor wheel to a 24x and swap the cam gear and crank position sensor, and use your E40. Or use your E40 and get a Lingenfelter 24 to 58x conversion box.
Yea sorry guys I wasn’t clear! Yes I wanted the cluster to function I don’t want cluster messed up and have pod gauges all over! It’s for my wife and you know how there are pretty particular about things!🙄
how about this in 08 the hummer v8 h3 alpha that’s what my ecm is programmed to and my tcm. Is there are chance I reprogram the bcm and rpo codes it would work because 08 this is the setup they used almost exact! Except the tcm were they used can to communicate between ecm and tcm only or would I have to reprogram all the modules at that point
I researched it looks like the bcm and cluster are the same between both years unless someone else know more please share thanks
If your H3 has E40 wiring and associated BCM, the E67 is not going to work with it. The easiest thing to do---if you want your gauges, accessories to work, is swap the reluctor wheel to a 24x and swap the cam gear and crank position sensor, and use your E40. Or use your E40 and get a Lingenfelter 24 to 58x conversion box.
I think this is your best suggestion. Changing/re-programming all the computers is at best a lot of trouble and potentially/likely a nightmare. Going from a E40 to an E67 would require a completely different main wiring harness.
Yes they both have 3 connectors but completely different according to this useful thread: https://forum.hptuners.com/showthread.php?27200-E67
The Lingenfilter 58x to 24x trigger box is $290 which is likely cheaper than swapping the reluctor wheel.
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Ecm help please! 
