Hello i have not been on in a while i work seven days a week hvac and restaurant equipment my trusty van let me down yesterday the battery light was on and the sysyem is not charging i took it to the dealer and they said the ecm is bad along with the water pump and three glow plugs approx cost 4500.00 my question does anyone know where i can get a ecm used or new thank you in advance j sanders

http://www.ebay.com/itm/2006-2007-06-07-CHEVY-GMC-6-6L-DURAMAX-TURBO-DIESEL-LBZ-LLY-ECM-PCM-COMPUTER-/140630702242

If you buy this, you'll need EFILive, or someone who has it & a spare license, to reprogram the ECM to work with your van.

Lots of tuners (e.g.: Rob at atptrucks.com or Nick at Duramaxtuner.com) sell reprogrammed performance-optimized ECMs, probably for less than an oem ecm from a dealer.

You should be able to get a new ECM for under $ 400.

Get with one of the EFILive tuners like Nick from DuramaxTuner and get an ECM through them. You can probably send them the ECM and they can see if it can be fixed and maybe get a bit of money back on a core.

Brian

I got a new ecm from the dealer today i saved my program and flashed it to the new one with efi i still have the same problem how do you check the alt. i have the main red wire to the battery a orange and a gray wire thank you j sanders

So the ECM was not bad?? Hope the dealer is not charging you labor for something that was not broke. It's a shame that when something has gone bad and they can't figure it out they blame the ecm. :mad: I know on older vehicles you can take the ground cable of the battery and if the engine continues to run the alt is good, as for the newer stuff I do not know if that will work.

For starters...get a multi meter, with the engine running you should have above 13 volts and below 15. You should see this at the battery and at the big terminal on the alt.

A good scan tool will also tell you the commanded duty cycle of the alternator (ie is the ecm "telling" the alternator to do something).

Your charging issue is likely something basic......not ecm related. I agree with 60MPH, dealers are in a rush to blame ECM's when they rarely are the issue. Check the basics, cables, connections, grounds etc.

Glow plugs are an easy fix too.

My battery cables were corroded,the bottom outside battery was dead and not even connected . Altenator was fine,so I would check that first also.

My battery cables were corroded,the bottom outside battery was dead and not even connected . Altenator was fine,so I would check that first also.

x2 on batteries.