This BenchForce Pass Through Breakout Harness for E41 ECM Unlock is for use with our E41 ECM Harness (BF01051) ONLY when using HP Tuners GM E41 ECM Upgrade Kit (ECM-00-L5P-K) to unlock the ECM on the bench. Simply remove the included fuse from the fuse holder and install the HP Tuners cable being careful to match the red wires and white wires during installation.
Please note:
Direct OBDII upgrades are available for GM E41 ECMs now. You don't need the HPTuners Upgrade Kit or this breakout harness if you are programming the following:
2018-23 Chevy Silverado GMC Sierra 2500-3500 (L5P)
2019-23 Chevy Silverado GMC Sierra 4500-6500 (L5D)
*2017 and some early 2018 models still require an unlock service