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Originally Posted by pdsq99f4
Temperature change will not cause an ses light. There is something wrong. Scan the code.
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Talked to my buddy who is a tech at one of the local chevy dealers..... he said they got a handful of vehicles in with SES lights, he said with extreme temp changes (teens to nearly 60 degress and then back down into the teens within a 2 day period) they had some cars come in with evap codes. He also said if the gas cap wasnt tightened well conditions like this would definately cause that code as well. My ole lady took it for gas and she is notorious for not screwing the gas cap back on tightly till it clicks. If the light comes back on then I will scan it but Im guessing its nothing.