K Tahoe 4WD V8-4.8L VIN V (2000)
DIAGNOSTIC AIDS
IMPORTANT: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing
or replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent water intrusion into the PCM.
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The following may cause an intermittent:
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Poor connections-Check for adequate terminal tension. Refer to Testing for Intermittent and Poor Connections in Diagrams.
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Corrosion
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Mis-routed harness
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Rubbed through wire insulation
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Broken wire inside the insulation
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A float that is stuck
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For an intermittent, refer to Symptoms. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom Related
Diagnostic Procedures
TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
4. This steps tests the engine coolant level sensor signal circuit between the PCM and the sensor.
6. This steps tests the engine coolant level sensor ground circuit between the PCM and the sensor.
9. This steps tests the engine coolant level sensor signal circuit for a short to ground.
10. This steps tests for an open in the engine coolant level sensor signal circuit between the PCM and the engine coolant level sensor.
