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Home >> GMC >> 1998 >> Forward Control 7.4 J >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 7.4L >> Self-Diagnostic System >> Reading Trouble Codes
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Reading Trouble Codes

NOTE: Use of Tech 1 or 2 scan tool is required to retrieve DTCs. Refer to user reference manual supplied with scan tool.
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