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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 >> Auxiliary Fluid Pump Pressure High or Low

Auxiliary Fluid Pump Pressure High or Low

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Auxiliary Fluid Pump Pressure High or Low

Checks Causes
Control Valve Upper Body Assembly (301)
  • Inspect for worn, sticking, or damaged actuator feed limit valve (334) and spring (333).
  • Inspect for worn, sticking, or damaged clutch boost valve (337) and spring (338).
Auxiliary Fluid Filter Assembly (6)
  • Inspect for damaged or restricted auxiliary fluid filter assembly (48).
  • Inspect for damaged fluid filter seal assembly (47).
  • Inspect pipe seal in the A/Trans fluid pump cover assembly (229).
A/Trans Fluid Pump Cover Assembly (229)
  • Inspect for worn, sticking, or damaged Isolator valve (236).
  • Inspect for worn, sticking, or damaged pressure regulator valve outer spring (235).
  • Inspect for worn, sticking, or damaged pressure regulator valve inner spring (234).
  • Inspect for worn, sticking, or damaged isolator valve (236) and sleeve (237).
  • Inspect for worn, sticking, or damaged auxiliary fluid pump valve (221).
  • Inspect for worn, sticking, or damaged pressure regulator valve (233).
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