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CP4 diagnose P228C P228B
Sounds good. Mine is still in the shop and everything is being replaced. The pump, injectors, rails and lines from what GM told me. -
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CP4 diagnose P228C P228B
My 2017 L5P has been shooting P228B P228C when I'm towing pulling up in the hills. It's been to the dealership 3 times for the same reason and they kept saying everything is fine. lol so today I loaded it and took the tech for a ride up the hill. They now see the problem and are replacing the...