Completely rebuilt and lowered truck. Did as a project with my son. Brand new GM frame, all new interior door panels, and seats. Runs and sounds great. We had a Dyno tune done when it was complete. $40,000 or best offer. Following are the rebuild upgrade details.

2011 LY6 Build
Block Wash
All New Seals
823 Rec. Port Heads milled .020 (same as LS3)
Vales Lapped, New Seals
.051 Head Gaskets
10.2:1 Compression
New Water Pump
New Alternator
LS7 Roller Lifters
.080 Push Rods
New Cam Plate Retainer
E-85 Injectors 42lbs
Trail Blazer SS Intake 4 Bolt TB
E-1840-P Sloppy stage 2 Camshaft
585"/.585" lift, 228°/230° 
Roller 112 Lobe Separation
Front Cam Sensor
Complete Timing Gear Replacement
Crank Sensor
Timing Chain Dampener
2800 Converter
Transmission Rebuilt
20,000 kms on new rebuild

Any questions call or text 519-521-7575