GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2006 🢒 VUE - AWD 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Symptoms - Automatic Transmission

Diagnostic Category

Diagnostic Information

The following table consists of eight diagnostic categories that are located in the left hand column. Using this column, choose the appropriate category based on the operating conditions of the vehicle or transmission. After selecting a category, use the right hand column to locate the specific symptom diagnostics information.

Fluid Diagnosis

This category contains the following topics:

    • Fluid condition - appearance, contaminants, smell, overheating
    • Line pressure - high or low
    • Fluid leaks
    • Refer to Transmission Fluid Check .
    • Refer to Line Pressure Check .
    • Refer to Fluid Leak Diagnosis .
    • Refer to Engine Coolant/Water in Transmission .

Noise and Vibration Diagnosis

This category contains the following topics:

    • Noise - drive gear, final drive, whine, growl, hum, rattle, knock, clunk
    • Vibration
    • Refer to Noise in All Ranges .
    • Refer to Vibration at Idle .

Range Performance Diagnosis

This category contains the following topics:

    • No Park
    • No Reverse or slips
    • No Drive or slips
    • No engine braking
    • Range selector displays incorrect range
    • Refer to Stall Speed Test .
    • Refer to No Forward and Reverse .
    • Refer to No Drive in Forward Ranges .
    • Refer to Stall Speed High in Reverse .
    • Refer to Vehicle Does Not Move in Low Range .
    • Refer to Low Stall Speed .

Shift Quality Feel Diagnosis

This category contains the following topics:

    • Harsh shifts
    • Soft shifts
    • Harsh engagement
    • Delayed engagement
    • Refer to Harsh Shifts .
    • Refer to Harsh 1-2 or 2-1 Shift Feel .
    • Refer to Harsh or Soft 2-3/3-2 Shift Feel .
    • Refer to Harsh or Soft 3-4/4-3 Shift Feel .
    • Refer to Harsh Shift 4 to 5, or 5 to 4 .
    • Refer to Delayed Engagement into Reverse .

Shift Pattern

This category contains the following topics:

    • No upshift
    • No downshift
    • Refer to Transmission Does Not Shift .
    • Refer to Forward Motion in Neutral .

Shift Speed Diagnosis

This category consists of the following topic:

Inaccurate or inconsistent shift points
    • Refer to Erratic Shift Quality .
    • Refer to Shift Speed Too Low .

Torque Converter Diagnosis

This category contains the following topics:

    • Torque converter diagnosis
    • TCC does not apply
    • TCC does not release
    • TCC apply/release quality
    • Refer to No Torque Converter Clutch Apply .
    • Refer to Torque Converter Diagnosis .

Symptom Can Not Be Duplicated or Symptom Not Found

This category contains the following topics:

    • Transmission fluid diagnosis
    • Line pressure diagnosis
    • Road testing
    • Refer to Transmission Fluid Check .
    • Refer to Line Pressure Check .
    • Refer to Road Test .