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GMC
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1982
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Magnavan Automatic Trans, Trans Mfr CD 400/M40
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Repair and Diagnosis
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General Information
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Map - Exhaust Systems
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Exhaust Systems
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Muffler Valve
Muffler Valve
Condition
Code
Procedure
Inoperative
A
Require repair or replacement
NOTE:
It may be necessary to replace the muffler assembly to correct this condition.