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Message: <blockquote data-quote="CharlesL" data-source="post: 1449155" data-attributes="member: 129093"><p>...is causing this? i have a 4wd gmc jimmy 99. sometimes when i drive the 4wd console lights stay on the whole time, but not every time. a mechanic told me a diagnostic test could not figure out the problem and that it would take labor to figure it out. pretty sure it is a sensor. how can i find out which one without going to a shop? serious answers only please.</p></blockquote><p></p>