AutoTuner Solution: VAG MD1CS004 Authentication Error

 Alientech KESS3 released new Boot protocol for AC Delco E67- GM platforms.

Expand your workshop possibilities with the new BOOT protocol dedicated to AC Delco E67 ECUs. Designed to guarantee full ECU access even in the most complex configurations, now alongside OBD communication.

  • Read and write on AC Delco E67 in BOOT mode
  • Stable and reliable procedures on complex GM systems
  • Full engine management control on GM vehicles from 2006+, from 2.4L to 6.2L engines

30.01.2026 — Upgrade 2.84

This development focuses on the many GM platforms from 2006 onwards, covering a wide range of engines from 2.4 to 6.2 liters.

Alongside the already available OBD communication, BOOT mode is now introduced, designed to ensure full access to the ECU even in the most complex configurations. An update that significantly expands operational possibilities on SUVs, sedans, and ultra high-performance vehicles in the American market, providing stable and reliable procedures on one of the most widespread ECU families within the GM group.

A concrete solution to effectively handle operations on vehicles that have historically been complex and highly valuable for workshops.

Technical focus

Connection: BOOT
ECU: AC Delco E67
Production years: from 2006
Brands involved: Buick, Cadillac, Chevrolet, GMC, Holden, Hummer, Isuzu, Pontiac, Saturn

Supported vehicles ECU

Buick Lacrosse, Lucerne, Rainier, Terraza, Verano
Cadillac CTS-V, DTS, XRS, STS, XLR
Chevrolet Camaro ZL1, Impala, Montecarlo, Trailblazer, Uplander
GMC Acadia, Envoy, Savana
Holden Commodore VE
Hummer H3
Isuzu Ascender GMT360, Ascender GMT370
Pontiac G6, G8, Grand Prix, Montana
Saturn Aura, Ion, Outlook, Relay, Sky, Vue


KESS3 Update GM Delco E67 ECM in Boot Mode 

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