After many weekends of disassembly and reassembly my 08 Silverado vin0 is running again after DOD delete also have tuner. Seems I have a small hiccup as the idle wants to increase after initial start to about another 1500 rpm. This happens when you put it in n and it revs up. Put it back in drive and it’s still there but not as noticeable during driving. Stop turn it off then start it’s fine. Put in gear drive put in n and revs up. Any idea.

Thanks.

 

The idle issue has resolved itself. Seems the system had to relearn the system of operation after the rebuild.