I Suspect that you have AIR in your COOLING SYSTEM Fallow Procedures BELOW to Insure there is NO AIR IN COOLING SYSTEM
Draining and Filling Cooling System Draining Procedure Important:
Do NOT add any engine coolant supplement sealant pellets to the cooling system. Drain and refill the engine cooling system every 5 years or 240,000 km, (150,000 mi)
, whichever occurs first.
- Park the vehicle on a level surface.
- Remove and clean the coolant recovery reservoir.
Refer to Radiator Cap
Removal Caution in Service Precautions.
- Remove the radiator cap when the engine is cool:
Slowly rotate the cap counterclockwise to the detention tab. Do not press down while rotating pressure cap.
Wait until any residual pressure, indicated by a hissing sound, is relieved.
After all hissing stops, press down on the radiator cap
and rotate the cap counterclockwise in order to remove the cap.Important:
Recover and store used coolant in a used coolant holding tank and submit the used coolant for recycling on a regular basis. Do NOT pour used coolant down the drain. Ethylene glycol antifreeze is very toxic. Disposing of ethylene glycol into the sewer system or ground water is both illegal and ecologically unsound.
- Place a drain pan under the radiator drain valve in order to collect all of the used coolant.
- Open the radiator drain valve located at the bottom of the radiator tank. If only partial cooling system draining is required, drain enough coolant to perform the procedure.
- Open the air bleed valve on the thermostat housing 2 full turns
- Open the air bleed valve above coolant pump 2 full turns.
- Place a drain pan under the engine block drains in order to collect the used coolant.Important: Allow the coolant to drain completely.
- Remove both of the engine block drains.
- The front left engine block drain is located between the starter motor and the engine oil filter.
- The rear right engine block drain is located near the crankshaft position sensor.
Reinstall the engine block drains
- Close the radiator drain valve,
- Install the coolant recovery reservoir. Notice: When adding coolant, it is important that you use GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL coolant. If Coolant other than DEX-COOL or HAVOLINE DEX-COOL is added to the system the engine coolant will require change sooner; at 50,000 km (30,000 mi) or 24 months.
- Slowly add a 50/50 mixture of GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL and clean, drinkable water to the radiator until the coolant level is at the base of the radiator fill neck.
- Wait for 2 minutes and reinspect the level of the coolant in the radiator. If necessary, add coolant to the radiator until the coolant level is at the base of the radiator fill neck.
- Install the radiator cap.Ensure that the radiator cap arrow points toward the radiator overflow tubeImportant: The air bleed valves are brass. Do NOT over-tighten the air bleed valves.
- Close the air bleed valve above the coolant pump.
- Close the air bleed valve on the thermostat housing.
- Fill the coolant reservoir with a 50/50 mixture of GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL and clean, drinkable water. Caution: Refer to Radiator Cap Removal Caution in Service Precautions. Important: If the coolant temperature indicator turns ON, turn the engine OFF immediately and allow the engine to cool. Do NOT remove the radiator cap.
- Start the engine and allow the engine cooling fan to cycle on and off 3 times. If the low coolant indicator does not turn OFF and the coolant level is above the Full Cold mark on the coolant recovery reservoir, refer to Engine Coolant Temperature Gage Inaccurate or Inoperative.
- Turn off the ignition.
- Allow the engine to cool.
- Ensure that the engine coolant concentration is sufficient.