LEMON Manuals
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GMC
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1999
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Forward Control 6.5 F, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System - Tests W/Codes - DTC P1537-U1193
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DTC P1621
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DTC P1621: Pcm Memory Error (1.9L SATURN)
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Diagnostic Procedures
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Diagnostic Procedures
Reprogram PCM. If DTC P1621 resets, replace PCM. Program replacement PCM using required equipment.