Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 755 (AUTOMATIC TRANSMISSION, 4L60-E/4L65-E (TROUBLESHOOTING))TROUBLESHOOTINGSYMPTOMS - AUTOMATIC TRANSMISSION

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Symptoms - Automatic Transmission

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Symptoms - Automatic Transmission

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostic Category	Diagnostic Information
This table consists of nine diagnostic categories that are located in the left 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 column to locate the specific symptom diagnostic 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 Checking Procedure . Refer to Oil Pressure High or Low . Refer to Fluid Leak Diagnosis . Refer to Oil Out the Vent .
Noise and Vibration Diagnosis: This category contains the following topics: Reattaching noise Noise - drive gear, final drive, whine, growl, rattle, buzz, popping Vibration	Refer to Reattaching Noise . Refer to Vibration in Reverse and Whining Noise in Park . Refer to Popping Noise . Refer to Whine Noise Varying with RPM or Fluid Pressure . Refer to Buzz Noise or High Frequency Rattle Sound . Refer to Noise in Random Ranges .
Range Performance Diagnosis: This category contains the following topics: Drives in Neutral No Park No Reverse No Drive No engine braking Lack of Power or Hesitation	Refer to Drives in Neutral . Refer to No Park . Refer to No Reverse or Slips in Reverse . Refer to No Drive in All Ranges . Refer to No Drive in Drive Range . Refer to No Overrun Braking - Manual 3-2-1 . Refer to Lack of Power or Hesitation .
Shift Quality (Feel) Diagnosis: This category contains the following topic: Harsh, soft or slipping shifts Harsh, soft or delayed engagement Shift shudder, flare or tie-up	Refer to Harsh Shifts . Refer to Slipping or Harsh 1-2 Shift . Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting . Refer to No 3-4 Shift, Slips or Rough 3-4 Shift . Refer to Harsh Garage Shift . Refer to Delay in Drive and Reverse . Refer to 3-2 Flare or Tie-Up .
Shift Pattern: This category contains the following topics: One forward gear only Two forward gears only Gear missing or slipping No upshift or slipping upshift No downshifts Non-First gear start	Refer to First Gear Range Only - No Upshift . Refer to Third Gear Only . Refer to Second/Third Gear Only or First/Fourth Gears Only . Refer to Slips in First Gear . Refer to Slipping or Harsh 1-2 Shift . Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting . Refer to No 3-4 Shift, Slips or Rough 3-4 Shift . Refer to No Part Throttle or Delayed Downshifts . Refer to Second Gear Start .
Shift Speed Diagnosis: This category contains the following topic: Inaccurate or inconsistent shift points	Refer to Inaccurate Shift Points .
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 Torque Converter Diagnosis Procedure . Refer to No Torque Converter Clutch (TCC) Apply (300 RPM Slip) . Refer to No Torque Converter Clutch (TCC) Release .
Indicator On or Message Center Displays Message: This category contains the following topics: High Trans Temp light does illuminate	Refer to DTC P0218 .
If Symptom Not Found	Refer to Transmission Fluid Checking Procedure . Refer to Road Test Procedure . Refer to Line Pressure Check Procedure .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.