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Home >> GMC >> 2004 >> Envoy 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission, 4L60-E/4L65-E (Troubleshooting) >> Diagnostic Information and Procedures >> Buzz Noise or High Frequency Rattle Sound

Buzz Noise or High Frequency Rattle Sound

Buzz Noise or High Frequency Rattle Sound

Checks Action
DEFINITION: A buzz or high frequency rattle
  • Trace Cooler Pipes
  • Check for binding or contact at the Radiator, other than at the Cooler Pipe connectors
 Verify a pressure buzz by watching for a needle vibration of the pressure gage. A road test may be necessary. Refer to Road Test Procedure  .
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