GM Service Manual Online
For 1990-2009 cars only

Checks

Cause

Oil Pan Fluid Leak

  • Oil Pan (28)

The pan is damaged or the pan is not flat.

  • Gasket (29)

Damaged or mispositioned

  • Case (7)

Porosity or cracked

  • Bolt (27)
    • The flange is inside out.
    • High or low torque

Fill Tube Fluid Leak

  • Seal
    • Cut or nicked
    • Missing
  • Case (7)

Porosity

  • Fill Tube
    • Damaged at the case end
    • Not seated in the case
  • Brackets

Out of position, causing tension on the fill tube

Electrical Connector Fluid Leak

  • Electrical Connector

Damaged, or not seated

  • O-ring Seal
    • Cut or nicked
    • Missing
  • Case (7)

Porosity or cracked

Cooler Connector Fluid Leak

  • Cooler Connectors (8)
    • Stripped threads
    • Damaged flare
    • High or low torque
  • Case (7)
    • Stripped threads
    • Porosity
    • Debris in the threads

Case Extension Fluid Leak

  • Case Extension (19)

Porosity or cracked

  • Case (7)

Porosity or cracked

  • Seal (15)
    • Cut or nicked
    • Missing
  • Bolt (21)
    • Low torque
    • Missing

Manual Shaft Fluid Leak

  • Seal (707)
    • Cut or nicked
    • Not seated
  • Linkage

Misadjusted

Pump Body Seal Fluid Leak

  • Seal (201)
    • Cut, nicked, or worn
    • Missing garter spring
  • Torque Converter (1)

Damaged hub

  • Bolt

Low Torque

Vehicle Speed Sensor Fluid Leak

  • Seal

Cut, missing, or nicked

  • Vehicle Speed Sensor Assembly (22)
    • Damaged
    • Not seated
    • Damaged bracket
  • Bolt (23)
    • Low torque
    • Missing
    • Damaged threads
  • Case (7)

Porosity or cracked

Output Shaft Seal Fluid Leak

  • Seal (20)

Cut or nicked

  • Case (7)

Porosity or cracked

Line Pressure Plug Fluid Leak

  • Plug (24)
    • Stripped threads
    • Low or high torque
  • Case (7)
    • Porosity or cracked
    • Damaged threads