With today’s technology, automakers have found ways to save even more fuel, even on higher-powered engines. One such invention is the cylinder deactivation system, which helps to cut back on fuel ...
Question:I was on a long drive with my 2009 Sierra with the 5.3-liter, and the MIL light came on. The code is a P3400 for cylinder deactivation. It's running fine. Answer:DTC P3400 tells us the PCM ...
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