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The LB7's do not typically leak or weaken. It's the LLY-LBZ-LMM that can be weakened IF they are beat up on by pressure cycling.
It's P0093 season and I am doing many 2001 LB7 ECM's with the same fix mentioned at the start of this thread.
Also seeing the same issue starting with LBZ and LMM P0087 codes.
Kennedy Diesel-owner
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