Josephur

Josephur / volt_unbrick.py

Created July 8, 2026 00:34 — forked from timkarnold/volt_unbrick.py

Chevy Volt Unbrick (HPCM2 SHVCS Reset Tool)

	#!/usr/bin/env python3
	r"""
	Volt SHVCS unbrick -- all in one.

	Reads the HPCM2 security seed over a VXDIAG VCX Nano (J2534), auto-computes the
	unlock key, and clears the SHVCS / "Propulsion Power Is Reduced" fault. No app,
	no subscription, no Techline -- just the Nano you already own.

	Pipeline (all to the HPCM2 at CAN 0x7E4, ISO15765 @ 500k):
	27 01 -> read seed (67 01 XX XX)