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Home >> GMC >> 2011 >> Yukon Base, 5.3 3 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Automatic Transmission - 2ML70 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> No First Gear

No First Gear

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No First Gear

Checks Causes
1-3 Clutch Assembly
  • Inspect for damaged 1-3 clutch piston assembly.
  • Inspect for worn or damaged 1-3 splines.
Drive Motor with Generator Position 2
  • Inspect splines.
  • Inspect HV connections.
Hybrid Low 1-2 Clutch Assembly
  • Inspect for damaged 1-2 clutch piston assembly.
  • Inspect for worn or damaged 1-2 splines.
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