Hi, I have a new to me 2002 GMC Sierra 2500 HD with 8100 Vortec 496 engine, and an MTG2500 with the latest available load version 9.2 on both the VCI and TSI programmable carts. It all works, except when I try to communicate to the check HVAC codes, and diags, it says no communications. All other engine and transmission paths work just fine.
I am wondering if I have and ECM issue to the HVAC or if the MT2500 code in version 9.2 did not cover this interface. Thx if anyone can let me know, I am using no keys in the in line adapter per the scanner saying no key is required.
Thx, Craig Schultz
I am wondering if I have and ECM issue to the HVAC or if the MT2500 code in version 9.2 did not cover this interface. Thx if anyone can let me know, I am using no keys in the in line adapter per the scanner saying no key is required.
Thx, Craig Schultz
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