Answer
Jan 31, 2019 - 08:33 AM
It reads powertrain codes for emissions on most Vehicles, I have heard that it does not work on some Volvo’s and newer Honda’s, so I can’t tell you for sure if it will work on your H2 my guess would be the newer it is the greater the chance it might not work. I think the W2976 would give you the best chance. I would call a Hummer service center and see what they say.
W2976 can be found here--> https://www.rvupgradestore.com/Perfor...
W2976 can be found here--> https://www.rvupgradestore.com/Perfor...
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