I really need help with my 2010 Yukon

[Tobin_G]

Just to keep this kinda brief because there’s a long time line of things replaced and not fixing problem I’ll just start this off with issue and my work around with it. Truck will no crank no start, when I pull the cable on the battery and put it back on fires right up and will have the issue again with in a few day. Code it throws are u0100 loss com with ecm/pcm, and a few other ones I feel are casued by no start like p0700 and a fuel Module request. Anyone get this Strangely consistent problem before feel like it must be a module because I can reset it every time. Thanks in advance hope I posted this in right spot I’m so desperate to fix this thing so unreliable.

 

[OR VietVet]

I would lean toward an alarm problem?

What have you replaced trying to fix it? I would check all those pesky grounds as well.

 

[Tobin_G]

I don’t have any anti-theft issues on dash and I have checked on the tech too to make sure it was functioning properly not to say that couldn’t be the problem just not sure where to go from there, I also replace the main ground from the battery to the block to the front of the frame.

 

[Tobin_G]

I don’t have any anti-theft issues on dash and I have checked on the tech too to make sure it was functioning properly not to say that couldn’t be the problem just not sure where to go from there, I also replace the main ground from the battery to the block to the front of the frame. I also don’t think resetting the truck disconnecting the battery could be a ground issue you know

 

[swathdiver]

How old is the battery? Can you see BCM codes and functions?

 

[Tobin_G]

Battery and alternator were replaced less that 2 months ago and I can read them, last code I had was loss tellicom

 

[Tobin_G]

Also if this helps anyone when I plug in my scan tool and other peoples it will not connect after I reset the battery and the check engine light will be on takes a little bit to connect like maybe a few hours of driving just seems like the OBD2 plug in a sense is dead

 

[TrybalRage]

I have been struggling with the exact same problem.

I replaced the BCM and it seems to have helped, however I just posted a new thread yesterday about how my new Tech2 is having trouble connecting to the ECM/BCM intermittently.

 

[Tobin_G]

I have been struggling with the exact same problem.

I replaced the BCM and it seems to have helped, however I just posted a new thread yesterday about how my new Tech2 is having trouble connecting to the ECM/BCM intermittently.

I got a new bcm and ecm till no fix for no starts

 

[OR VietVet]

I got a new bcm and ecm till no fix for no starts

Ok, seems like every time we throw out a possibility of what may or may not be related to the problem you are having, you open up with info about what you have replaced recently or what you replaced trying to fix this problem. Please, in chronological order, give a complete list of ANY work done just before the problem started and any work done after the problem, trying to fix it. These bits and pieces of info make it hard to get a flow of work and problem order. There are many threads here about the importance of good grounds on these rigs. Opening up the "parts cannon" on these rigs can be expensive and incomplete work and parts replacement info can lead to "hair pulling".