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When it's cold outside and I first turn my truck on all my lights dim for a minute or so and then get bright again, and this continues for a while. When they dim I hear a clicking noise on the passenger side of the engine compartment. The stealership tells me this is normal, and the noise is a heater that heats the air going through the intake and the lights are dimming because the heater draws so many amps. Does this sound right?