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2003-2005 pick-ups do not maintain torque converter lockup on deceleration - suggest 1030395 Torqloc to improve exhaust brake performance
high speed pull-into "1"
This kit is only for use with trucks that came factory with 22" wheels
Easy Installation
Easy to find Non-Proprietary Filter Cartridges
GDP MPVI3 E66 (Global B) Tune Files (2021-2026 Duramax LM2 3.0L) EXHAUST BRAKES 2020-2021 DURAMAX 6.6L L5P 2003-2005 pick-ups do not maintainGDP MPVI4 E66 (Global B) Tune Files (20212026 Duramax LM2 3. 0L) The GDP MPVI4 E66 (Global B) Tune Files are designed specifically for the 20212026 3. 0L Duramax LM2 engine. These calibrations work with the newer E66 ECM found in GMs Global B platform and require an ECM unlock service before tuning can begin. Once unlocked, the files are applied using the MPVI4 interface and six HP Tuners Universal Credits. This file package provides two selectable
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