The normal operating temperature for a 2006 Chevy Silverado 1500 with a 4.3L engine, as indicated on the gauge, should be slightly below halfway between the "C" (cold) and "H" (hot) marks. It's not precisely at the midpoint, but rather a bit closer to the "C." Think roughly in the
middle to slightly below middle range of the gauge.
Keep in mind that slight variations are normal depending on outside temperature and driving conditions. A consistently low reading could indicate a problem, as could consistently high readings. If you're unsure, consulting your owner's manual or a mechanic is always a good idea.
