I'm looking for some input from anyone who has had experience with a similar problem. The background on the issue starts a few weeks ago with a dead battery, and my alt was only putting out 9.xx volts, so I got a new one and everything was good for about another week. My Service light with wrench Icon showed up on my cluster, and my cluster randomly looses power and turns on when it wants too now. My radio will stay on during this period and the car runs like normal. The next day when I get up to go to work in the evening the car was dead...so I pulled the battery out of my truck and went on my way but disconnected the battery when I got to work.

The next day I started looking for my issue I assumed is a short to ground. I disconnected my negative battery cable and put a test light on the cable and a gator clip on the neg battery terminal with the key off. I noticed the light was on and over a period of roughly 5-15 second the light would dim, then after another 20 seconds or so it would get bright again. So given the light would dim and get bright again, I figured I'd pull a relay or fuse one at a time and check to see if the issue stops, and it did finally once I pulled the cluster fuse the light stayed out. Now I had rare5spd come over this past weekend to pick up some parts and he pulled a code U1064 with hpt. I've gone through my factory gm manuals and it says 064 code is the BCM according to book 2 of 2 section 8-134.

Now I checked all the wiring for gauges and other things I have put in the car, but since the issue is months after I installed anything electrical I'm leaning on the bcm being bad as all the wiring that I checked is fine and has no cuts or shorts. I did a quick search on here and what I found was that the car has to go to the dealer ]:-> to get the bcm re programed and I would like to know if there is another way if an independent shop has the ability given they have the right scan tool or if this is a strictly gm only thing.

Anyone who is a GM Tech or has actual experience in this area could you please chime in? I'm getting tired of pulling my cluster fuse anytime the car is parked.

Hey Jeff. Sory to hear about all this. Im actually wondering if the cluster itself is bad. Do you know one with a similar car that you can swap clusters with for a day or two and see if that helps. I say this, just bc of the fact that ur cluster kept randomly going on and off. Im also willing to bet that something inside the cluster has just gone to hell especially since its directly tied to the cluter fuse, and when you kill power to the cluster it stops the car from killing the battery. Before I deem the bcm bad I would try just swapping out a cluster and see if that helps. If not then its got to be the bcm and then from there, I cant help ya bud. Goodluck!

Thanks, I'm going to steal the cluster out of my old red car thats at my friends house when he is at work, hehehe...I got spare keys at least he isn't driving the car through the winter so he won't miss it.

So the cluster fuse gives 12v to both the BCM and the cluster. I would check the grounds to the bcm. I have had a cavy or two with fried ground curcuits (wires bunt up).

Zsquee24- I'lll double check the wiring once I get home, I'm on my cell right now. I swapped clusters but it hasn't cut out yet, and the light is on still but I'll see how it does after I reset the computer agian. I totally forgot I had put a sunfire cluster in my old car so when I swapped them the speedo wraps perfectly around my column gauge pod so that was cool, I don't want to give it back.

Alright I figured I'd post up that the BCM was infact bad and it got repaced and all is well. Just a little tip ask for a price quote if you need to do the same thing first. They told me $256.76 and then I put the number in gmparts direct.com and it was $140.00 shipped. When I told the parts guy that and asked what he could do if I had them do it over another local Chevy dealer he told me they could do $156.76 on the part and they would have it next day. So just because they quote you one price doesn't mean they wont work with you on it.

Good! Sorry I pointed u in the wrong direction, but since you were only having issues in those two spots figured it would be easy to swap a cluster instead of buying a BCM for nothing. Good deal on that BCM too!

Well I went to start my car this morning and the battery is dead, so I jumped the car and it runs, and disconnected the neg battery cable while the lights and stereo were on, and the alt was putting enough power out to keep everything going, so I turned it off and busted out the test light again. Looks like I still have an electrical draw somewhere, just now I don't have my cluster lit up like a christmas tree. Guess I had two problems come up at once so I'm back to figuring this out.

Well, if its under 10amps, start pulling fuses till you find the right one. Gotta love it. Hope you find the little @!#$ lol

Mike-I've pulled every fuse and nothing makes it go away, I got power on my test light, and not a little tim light like for radio memory but bright and it occasionally dims after roughtly 45-60 seconds. I'm kinda stumped I double checked all my engine/battery grounds and I've installed nothing new since I put my aem wideband in back in April. I did remove my drivers side door switch after seeing how the plunger came out without barely pulling on it and the spring and contacts were corroded. I'm almost to the point of dropping it off at my fathers friends shop as he is good with electrical problems and I'm stumped.

Well now you know the short is after the fuses. So try to dissconnect the body harness from the PCM and see if it goes out. If it does, it will be as simple and plugging it back in, and testing each wire to see whats going on. Soon as you find out what wire is doing it, you can find out what its for, and check all the wiring and such. If it dont, then u know its before there, and go to the next big harness and so on. If it does go out, it also could be the PCM you got it bad also keeping something from going to sleep when it should. Its not too hard to find just gotta have the pateince to find it. Takes time, but since you already pulled every fuse/relay now its time to find where it at. Just dicconnect harnesses, once the light goes out, you know its somewhere in there. Just finding the exact one it the PITA. If you need some help bro, let me know, we can make a weekend out of it and Ill have my buddy Ted you met the night with the wheels, come over, and we can tackle it all 3 of us. Im sure its going to be pretty easy.

Update....I finally found my ground issue...the ground on the trans wasn't crimpped tight as i could pull the wires out with a good pull. so I recrimped it and added another ground. I'm finally getting alt. voltage at the battery so I'm happy.