This2004 cadilac escalade ext 6.o litre engine all wheel drive pulled up a code at one of our parts store of C0186 and they could not tell me what it means. The problem was the gauges just started to fluctuate really bad for a few seconds and then became normal for about ten minutes, it did that a few times then all gauges went out on instrument panel for about 5 minutes then came back on. They have been working ok for now. PUZZLED. Thanks.
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