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Flushed coolant system, replaced radiator cap. A Tried Reprogrammed emc , light "turn off engine overheating" , when idiling. Fans keep running after car is off,AC on, no problems when ac off.

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  • What is the temp gauge showing? Have you rechecked the overflow-expansion tank level after several heat cool cycles? Have you tried any of the burping techniques generally suggested for GM vehicles? – mikes Jul 9 '20 at 23:36
  • Does the car overheat with AC off ? – ajayel Jul 10 '20 at 8:03
  • Flushed and burped the system. Replaced overflow reservoir cap. Only overheats with AC on while idiling. Leaking water on passenger side occasionally – Gatkinson Jul 11 '20 at 2:15

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