do you ever need to add coolent?or did you just notice this?
yes,you need to flush the coolling system and add new clean ati-freeze,,use a name brand like peak or prestone,these have a lube added for the water pump
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DRAINING AND REFILLING THE COOLING SYSTEM Note: Ethylene glycol/Water fill ratios have been established to ensure a minimum of 50 percent Ethylene Glycol in the coolant mixture following the recommended coolant flush, and drain procedure, and that all engine block drains and air bleeds were utilized.The cooling system capacity is 10.9 liters (11.6 quarts) . The coolant recovery reservoir capacity is 0.75 liters (0.8 quarts) to the "COLD" mark on the reservoir. The quantities listed in the filling procedure include the additional quantity to displace the air remaining in the coolant system after a static refill,Using the correct fill ratio and the following procedures will ensure a minimum concentration of 50 percent Ethylene Glycol in the coolant system and simplify the customer fill task. Refer to Figure for static fill radiator capacities. Every five years or 166,000 km (100,000 miles) whichever first occurs, the cooling system should be drained, and filled using the following recommended procedures.NOTICE: When adding coolant, it is important that you use DEX - COOL (orange-colored, silicate-free) coolant meeting GM Specification 6277M. If silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner at 50,000km (30,000 miles) or 24 months.Draining Important: This procedure significantly increases the amount of used coolant and diluted hazardous waste. CAUTION: As long as there is pressure in the coaling system, the temperature can be considerably higher than the boiling temperature of the solution In radiator without causing the solution to boil. Removal of the radiator cap while engine Is hot and pressure is high will cause the solution to boll instantaneously- possibly with explosive force - spewing the solution over engine, fenders and person removing cap. Under same conditions, the ethylene glycol in engine coolant is combustible.
Important: Recover coolant and store in a used coolant holding tank and submit the used coolant for recycling on a regular basis. This procedure significantly increases the amount of used coolant and diluted hazardous waste.
Important: Dispose of used coolant in a proper fashion, i.e., in a used coolant holding tank. NEVER POUR USED COOLANT DOWN THE DRAIN! Ethylene glycol antifreeze is a very toxic chemical; disposing of it into the sewer system or ground water is both illegal and ecologically unsound! Refilling
NOTICE: The low coolant indicator lamp may come on after this procedure. After operating the vehicle so that the engine heats up and cools down three times, if the low coolant indicator lamp does NOT go out, or fails to come on at ignition check and coolant is at the level indicated in step 3 go to Testing and Inspection. If at any time the "TEMP" warning indicator comes on, immediate action is required.Inspect: The freeze protection of the engine coolant after the engine heats up and cools down three times using a refractometer or a thermohydrometer to ensure proper freeze -37°C (-34°F) protection. Obtain the coolant mixture for the inspection from the base of the radiator neck, NOT from the coolant recovery reservoir.