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Home >> Chevrolet >> 2011 >> HHR LS, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 4T45-E - Diagnostic Information And Procedures >> 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
  • Trace Cooler Pipes
  • Inspect 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 gauge. A road test may be necessary. Refer to Road Test .