Engine Fails To Reach Normal Operating Temperature. GMC Truck GMC P42 Commercial Chassis 1998

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC P42 Commercial Chassis 🢒 Engine 🢒 Engine Cooling 🢒 Engine Fails To Reach Normal Operating Temperature

Step	Action	Value(s)	Yes	No
DEFINITION: The engine fails to reach the normal operating temperature. Cool air is felt from the heater.
1	Inspect the thermostat. Is the thermostat stuck open or was the wrong type of thermostat previously installed?	--	Go to Step 2	--
2	Replace the thermostat. Is the problem corrected?	--	System OK	--

Step

Action

Value(s)

Yes

DEFINITION: The engine fails to reach the normal operating temperature. Cool air is felt from the heater.

Inspect the thermostat.

Is the thermostat stuck open or was the wrong type of thermostat previously installed?

Replace the thermostat.

Is the problem corrected?

System OK