Hi guys - 2002 Sierra Denali LQ4 - I have a V1, I use it to see what's going on, scan and clear codes. Haven't upgraded to tune yet because prior I had gotten a Westers 91/93 tune. It's been a great tune, the truck has really come alive, but I have some serious spark knock around 4K, say while accelerating up an onramp to the interstate. I always run Mobil Super 93 and my MAF and TB is immaculately clean.
Attached is a log file from this morning, maybe someone could give some insight before I send my PCM back to Westers.
And maybe for Christmas, I can convince the GF to buy me the upgrade to Flashscan Commercial