Symptom Diagnosis

WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Perform PRELIMINARY INSPECTION prior to diagnosing by symptom.

NOTE: Use the following symptoms to aid in preliminary diagnosis. See Fig 1 -Fig 81 . If a listed symptom matches the customer's concern, check the applicable items for possible cause.

Fig 1: Transmission Fluid Leaks (1 Of 2)

G00075839

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Fig 2: Transmission Fluid Leaks (2 Of 2)

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Fig 3: High Line Pressure

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Fig 4: Forward Motion In Neutral

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Fig 5: Inadequate Lubrication At Low Line Or Heavy Loads

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Fig 6: Inadequate Lubrication

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Fig 7: Engine Stalls In Neutral

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Fig 8: Loss Of Power

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Fig 9: No Torque In Reverse & 3rd Gear

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Fig 10: Transmission Overheats

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Fig 11: Transmission Overheats At Wide Open Throttle

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Fig 12: Low Line Pressure

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Fig 13: Engine Starts In Gear

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Fig 14: Shift Lever Indicates Wrong Gear

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Fig 15: No Gear Selection

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Fig 16: Loss Of Drive (1 Of 2)

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Fig 17: Loss Of Drive (2 Of 2)

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Fig 18: No Park

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Fig 19: Remains In Park

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Fig 20: Difficult To Shift Out Of Park

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Fig 21: Does Not Stay In Park

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Fig 22: No Reverse

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Fig 23: No 1st Gear - "D1"

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Fig 24: No 2nd Gear - "D1"

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Fig 25: No Overrun Braking - "D1"

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Fig 26: No Engine Braking - "D1"

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Fig 27: No 1st Gear - "D2"

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Fig 28: No 2nd Gear - "D2"

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Fig 29: No Overrun Braking - "D2"

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Fig 30: No Engine Braking - "D2"

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Fig 31: No 2nd Gear Engine Braking - "D2"

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Fig 32: No 1st Gear - "D3"

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Fig 33: No 2nd Gear - "D3"

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Fig 34: No 3rd Gear - "D3"

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Fig 35: No Overrun Braking - "D3"

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Fig 36: No Engine Braking - "D3"

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Fig 37: No 1st Gear - "D4"

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Fig 38: 1st Gear Only - "D4"

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Fig 39: 1st & 2nd Gear Only - "D4"

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Fig 40: 2nd Gear Only - "D4"

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Fig 41: 2nd & 3rd Gear Only - "D4"

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Fig 42: 1st & 4th Gear Only - "D4"

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Fig 43: 3rd & 4th Gear Only - "D4"

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Fig 44: No 2nd Gear - "D4"

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Fig 45: No 3rd Gear - "D4"

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Fig 46: No 4th Gear - "D4"

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Fig 47: No Torque Converter Clutch Apply

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Fig 48: Soft Torque Converter Clutch Apply

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Fig 49: Torque Converter Clutch Slipping

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Fig 50: Torque Converter Clutch Stuck On

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Fig 51: Incorrect Torque Converter Clutch Apply Or Release

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Fig 52: Converter Ballooning

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Fig 53: No Torque Multiplication

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Fig 54: Fluid Foaming

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Fig 55: Noise

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Fig 56: Engine Stall

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Fig 57: Vibration

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Fig 58: Oil Out The Vent Tube

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Fig 59: No Torque In 2nd Gear

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Fig 60: 2nd Gear Starts

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Fig 61: 3rd Gear Starts

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Fig 62: 4th Gear Starts

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Fig 63: Erratic Shift Quality

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Fig 64: Transmission Slips

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Fig 65: Case Extension Bearing/Seal Failed

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Fig 66: Inaccurate Shift Points

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Fig 67: Harsh Shifts

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Fig 68: Harsh Shift "D" To "R"

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Fig 69: Harsh Shift "3" To "4"

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Fig 70: Harsh Shift "4" To "3"

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Fig 71: Harsh Shift "D4" To "D3", "D2", Or "D1"

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Fig 72: Soft Shifts

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Fig 73: Soft Shifts Into "R"

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Fig 74: Soft Shift "R" Into "D"

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Fig 75: Soft Shift "2" To "1"

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Fig 76: Soft Shift "2" To "3"

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Fig 77: Soft Shift "3" To "2"

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Fig 78: Soft Shift "D3" To "D2"

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Fig 79: Delayed Shift "1" To "2"

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Fig 80: No "D2" To "D1"

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Fig 81: No "D3" To "D2"

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