Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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Bank 1 low side shorts means to check all the wiring and connections first for that bank.
If the wiring is all good including the grounds, then you can have a computer issue.
Attach your scan tool and try doing some bidirectional tests on all the modules to see what your responses are.
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My diagrams don't cover that large of a truck. Have you tried Identifix?
They would have that for you.
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