Bad thermostat?
#2
likely a failed ECTS (Engine coolant temp sensor. tells the PCM the coolant temp and also drives the dash gauge. Influences air/fuel mix among other things. When they fail they tend to "read cold".
Replace with a brass tipped style replacement. Should also replace connector too.
Get from a GM dealer.
Two wire device located in cylinder head on passenger side. Use teflon tape on threads and work on a cool engine.
Replace with a brass tipped style replacement. Should also replace connector too.
Get from a GM dealer.
Two wire device located in cylinder head on passenger side. Use teflon tape on threads and work on a cool engine.
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