I have a 2007 Avalanche 5.3 4x4 with a little camshaft and cold starting problems. It happens with both 87 octane and E85. I use E85 almost exclusively.

I suspect it is too lean initially. Any suggestions? If so, where do I make the changes?

The camshaft is: 208/216 .554”/.561” 114LSA +4

I went to the "Cranking Fuel" table under Fuel Control > General and added 10% more fuel across the table from 68*F and cooler and then applied smoothing to the table. However, this does little to improve starting.

Since most of my problem is when the engine is cold no matter what the temperature of the outside air is, I figure this is a good place to start.
However, I should note that the colder it is outside, the worse the starting is. Sometimes the starter will time-out when starting in cool weather (below 50*F).

I'm at a loss as to why the cranking seconds goes to 43200 seconds/12 minutes. Could it be an elapsed time since the last start or drive?

But, if anyone has some good ideas, I do welcome them.

It is also worth noting that the engine will stutter or cough when driving down the road without warming it up.

The thread I started on HP Tuners is linked here . . .
http://www.hptuners.com/forum/showthread.php?t=27526
The log file and tune file is located on this thread.