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I changed my cousins oil on his 2003 gmc sierra 1500 4.3L. i put in 5w30 mobil 1 synthetic oil and an AC Delco oil filter. the next day he called and said his change oil light is on but it doesnt stay on constantly like i thought most gm vehicles do he says it comes on when first started then goes away. did i do something wrong?
 
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no you didn't do anything wrong,its supposed to come on for a second or two then go off,this just shows that its working,if it stays on then you have a problem,it tells about this in the owners manual also,good luck with it.
 
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