K Tahoe 4WD V8-4.8L VIN V (2000)
Diagnostic Chart (Part 2 Of 2)
Schematic
CIRCUIT DESCRIPTION
The oil level switch is a normally open switch. When the oil level is within an acceptable range the oil level switch closes. The switch opens when the
engine oil level drops below a predetermined amount. The Powertrain Control Module (PCM) tests the engine oil level switch circuit with the ignition
ON, engine OFF. The PCM monitors the engine coolant temperature to ensure proper engine oil drain back to the oil pan. When the engine is colder
