Question about 1998 GMC Sierra

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My check engine light had been come'n on and going off now its staying on what should i do....

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Usually the only codes ive seen come on and go off are oxygen sensor codes, however your local parts stores offer services to check your check engine light for free (examples autozone, advance auto parts etc) once you have it scanned you will have a code and a description of what code it setting your light to come on.

Posted on Aug 05, 2010

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Get an OBD-II scanner (like a $98 one at Walmart) that can scan the computer for stored codes. This can tell you what to check for and lead to a solution for your engine's problem.

There are hundreds of possible codes that can arise on today's engines that can affect driveability and efficiency.



Posted on Aug 05, 2010

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