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Home >> Chevrolet >> 2004 >> Blazer 2D Utility, 4WD, Part Time, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Engine Cooling System) >> Diagnostic Information and Procedures >> Engine Fails To Reach Normal Operating Temperature

Engine Fails To Reach Normal Operating Temperature

WARNING: This page is about a different car, the 2004 GMC Safari and 2004 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Engine Fails To Reach Normal Operating Temperature

Step Action Value(s) Yes No
1 Check the coolant for proper concentration level.
Is the coolant concentration level within specification?		 - Go to Step 3  Go to Step 2 
2
  1. Drain the cooling system. Refer to Draining and Filling Cooling System .
  2. Flush the cooling system, if necessary. Refer to Flushing .
  3. Refill the cooling system with a 50/50 mixture of DEX-COOL® coolant and clean, drinkable water. Refer to Draining and Filling Cooling System .
Is the repair complete?		 - Go to Step 7  -
3 Check the thermostat to see if it is in a stuck open position.
Is the thermostat stuck open?		 - Go to Step 4  Go to Step 5 
4 Replace the thermostat.
Is the repair complete?		 - Go to Step 7  -
5 Check the coolant level.
Is the coolant level below the add mark?		 - Go to Step 4  System OK
6 Add the coolant as necessary. Use the proper fluid. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.
Is the repair complete?		 - Go to Step 7  -
7 Verify proper system operation.
Is the engine slow to warm up, does not reach normal operating temperature or does not have enough heat?		 - Go to Step 1  System OK
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