Service engine light??


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Posted by Guy (74.82.68.22) on 18:52:57 02/20/13

'99 GMC Sub,K2500,454,3/4 ton, 4wd,auto trans, ac, nearly 200K on the girl.

SES light comes on occasionally. Stays on for a few days then goes off. A buddy put a scan tool on it and got a "random misfire" code.

It happens when its cold for here. Say 20 or below (I know that's not cold).

Any thoughts or experience on what might cause it to throw the code?

Thanks
Guy



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