2002-2006 Chevrolet Avalanche 5.3L and 8.1L Custom Tuning Tune Service:Traditional [$355] This service disables the Passlock

This service disables the Passlock System (otherwise known as Vehicle Anti-Theft System (VATS) or Theft Deterrent) within the PCM on most 1998-2013 GM Trucks and SUVs

Manual transmission vehicles will see a big improvement in shift speed and feel

Compatible with thousands of years

Using that data

Black Bear Performance offers our AutoCal custom tuning service for your 2007-2008 GMC Sierra Denali 6

2002-2006 Chevrolet Avalanche 5.3L and 8.1L Custom Tuning Tune Service:Traditional [$355] This service disables the PasslockBlack Bear Performance offers three different levels of custom tuning service for your 2002 2006 Chevrolet Avalanche 5. 3L and 8. 1L. 20 25hp, 15 20ft lbs of torque gains are common out of the 5. 3L variation and 8. 1L engines can see a monster 50+ ft lbs of torque. Combine that with improved shift patterns, towing capabilities, throttle response and even fuel economy in many cases and you'll have what feels like a whole new vehicle! Due to frequent