![]() Once in the coolant, the oil leavesĭeposits on the level sensor creating an insulating film. Possible sources of oil contamination are internalĮngine leaks, improper service procedures, or the addition of some types ofĪnti-leak additives to the cooling system. The cause of this condition may be due to engine oilĬontaminating the coolant. Some customers may comment that the low engine coolant level Operation/Check Sensor for Oil Contamination) Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Refer to Coolant Level Module Replacement in Engine Cooling. Replace the engine coolant level indicator module.Turn the ignition switch to the RUN position.Disconnect the engine coolant level indicator module connector.The engine coolant level indicator module is on the right side of the radiator just down below from the radiator cap ! The engine coolant level switch grounds the indicator with the coolant level in the coolant reservoir below the minimum recommended level. Complaints filed with Buick gems and no compensation was offered.Hi Tammie, Is the coolant level low ? If not , Since this was already evident due to the service bulletin being published, Buick gems should have completed these repairs as warranty. It is obvious inferior workmanship on Buick' s apart to have two gaskets leak and cause expensive repairs to the owner of their product. Both gaskets leak and cause problem within 6 month's of our year warranty expiring even though we were under the 36,000 mile warranty. This repair cost $ it amazed us that two weeks after crown worked on our vehicle the oil pan gasket starts to leak. They changed the lower gasket and due to the service person quoting us a wrong price on the cost f the repair this was completed for $ two weeks later, the oil pan gasket was diagnosed as leaking. They diagnosed the problem as a leaking lower gasket and the air was getting into the system causing the sludge. Mechanic suggested that we bring it to the dealer since it was probably a gasket leak. Two weeks later, the same sludge was starting to appear in the radiator. Per service bulletin # 00-06-02-004 the mechanic flushed the system and replaced the radiator cap. Upon checking the contents of the radiator, a brown sludge was noted inside. Vehicle was brought to mechanic shop since we where out of the three year warranty by about 6 months. Vehicle started to run a little lot in October 2002. Gm should be responsible for the cost incurred for the replacement on the lower intake manifold gasket on affected gm vehicles, as they claim the system is good for 150,000 miles with the dex cool coolant, which is clearly a false claim. Gm, however, has done nothing to rectify this problem. There are several petitions on the internet regarding this faulty equipment, advocating for a gm recall. ) after having my vehicle repaired for $900, I am told by my service repairman that this problem will occur again in another 70-80,000 miles, should I own the vehicle for that long. However, my internet research of othersã‚ complaints, and the service repairman at my local garage, confirmed that the dex cool coolant through the lower gasket at approximately 70-80,000 miles, requiring a new lower intake manifold gasket and a coolant flush, as well as a necessary oil change because the coolant leaks into the oil due to the faulty gaskets (and in turn causes decreased lubrication in the engine and ruins the bearings which is also a costly problem. Gm claims that the dex cool coolant, which is required in their vehicles, lasts for 150,000 miles of vehicle use without needing to be changed. The problem was that the lower intake manifold gasket needed to be replaced. I did extensive research on the internet and identified that tens of thousands of gm vehicle owners have had this same problem with the coolant systems in their gm vehicles. ![]() The coolant level was not low however, there was a small amount of coolant on the ground. Recently, the low coolant dash light began to intermittently illuminate, which prompted me to check thee coolant level and search the underneath of my vehicle. I bought the vehicle used and have no current warranty. I am the owner of a 1999 Buick Century with 78,000 miles.
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