My friend just purchased a bone stock 2004 awd Silverado SS. I notice the factory ignition tables have no spark advance and it didn't even like adding 2* at all. Is this common for the Lq9? Only thing I tried was what Russ K suggested in someone else's post when searching around about the SS. Is there much that can be changed on the Factory setup for any more power. I'm not throwing my wideband on his truck. Maybe is the PE Afr set really rich from factory and can lean it out a tad or vise versa?
"Get your shift pressures set up for a firm shift BEFORE removing the torque management! Then if your truck has the 4L80E, you can zero the trans upshift torque reduction and disable the trans abuse. If your tuning a Silverado SS with the 4L60E, just reduce the upshift torque management by 50%, unless you have the Corvette 2-4 servo installed.
On the 6L trucks, the PE is always delayed till ~5200 rpm. Change the delay to 0 rpm, the enable torque to 0% and set the enrichment rate to 4.
Russ Kemp"