crunchnd

I came across this on a different forum and describes my issue almost exactly. The only thing that confuses me is that the TSB number is in a different format than what i am used to seeing (ie. XX-XX-XX-XXXX). Is this something the dealer will recognize if I bring it in to them? #PIT4816: Multiple Electrical Concerns With DTC C0900 - keywords battery c/k cable clock crank cycle door dimming flicker gage gauge gmc hvac inop inoperative instrument ipc lock no panel power radio stall - (Feb 27, 2009) Subject: Multiple Electrical Concerns With DTC C0900 Models: 2007 -2009 Cadillac Escalade, ESV, EXT 2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2007-2009 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL (Equipped with Gasoline Engines) The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Condition/Concern: Some customer may experience one or all of the following concerns. 1) Intermittent No Crank or No Vehicle Power ( The customer may get the impression that the vehicle actually has a dead battery ) 2) Volt gauge fluctuates, and seems to decrease when a high load accessory is turned on ie.. headlamps, wipers 3) IPC backlighting flickers or IPC goes blank 4) Diagnostic Code: B1325 set in several modules followed with a Dtc: C0900 set in the EBCM. 5) Radio clock resets 6) Intermittent Stall 7) Hvac temperature actuator defaults to hot 8) Door locks cycle Recommendation/Instructions: If you experience one or all of the following concerns and a cause for the concern can't be identified, please check the following items: 1) Remove the 175 amp Mega fuse and inspect for arcing, if any type of arcing is found replace the effected components. 2) When re-installing the 175 amp Mega fuse, torque fasteners that attach the mega fuse to the positive cables to specification in SI. 3) Check the voltage drop reading on the positive and negative battery cables. The voltage drop should be performed with the fuel injectors disabled and while cranking the engine. The voltage drop should not exceed 200 mV. If the voltage drop is above 200 mV, replaced the effected cable. Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

I was driving my 2008 Silverado (42K miles) this weekend. I had the cruise set going down the highway and as soon as I used my turn signal to pull out, my cruise kicked out. I was driving about 100 miles and was able to repeat this every single time. First though through my head is that there is an electrical short coming from the multi-function stalk. So next thing I tried is pulling on the stalk to turn on the high beam and WHOA...my entire electrical system appeared to re-boot. Every light in the dash turn on, I saw a Stabilitrak Off flash, Airbag light flashed, my clock on my radio reset to 12:00, the HVAC reset. So after all these lights went off, I got to my destination, shut the truck off, hoping the computer may have needed to reset and attempted to start it again. I turned the key on and nothing, no power. Key cycled it a few times and still no power. Waited a minute, and then it started fine. I also have noticed since this happened that when I turn my key off, my radio and other accessories immmediately shut down, instead of staying on until I open the driver door. I have driven a it a few times over the weekend, and I keep noticing that the clock and HVAC continue to reset themselves intermittently. Also, the radio will cut out briefly when I tap the brakes with cruise on so it makes me wonder if there is a short somewhere in the harness in the dash. I have noticed twice during the past two weeks that my truck hasn't started using the factory remote start and the day before this bizarre behavior, when I went to start the truck, it gave me a security system type error on the cluster when I attempted to crank it. The second time it started fine. I came across TSB # 09-08-68-001, but that does not seem as bad as the issue I am experiencing. I haven't checked for a bad ground cable yet, but thought I would see if anyone has experienced anything similar. The battery was replaced back in December.