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GMC
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1998
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C3500 HD 6.5 F, Automatic
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Repair and Diagnosis
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External Pages
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Different variant/trim
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Section 6 (Engine Controls - System & Component Testing 7.4L)
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Computerized Engine Controls
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Control Unit
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Notes
Control Unit: Notes
WARNING:
This page is about a different variant/trim than selected.
NOTE:
To identify circuits referenced in the following ground and power tests, use wiring diagram in
WIRING DIAGRAMS - 7.4L
article.