Headlights problems of the 2003 Chevrolet Suburban

During cold months only vehicle has power surges whenever driving. Interior lights and headlights flicker consistently to where it appears I am flashing my lights. The higher the rpms, flickering is more frequent. Apparently a known issue with no solution or recall. Alternator and battery testing out good.

While driving with headlights on they would flicker off and on intermittently. This would cause poor visibility for the driver at night. Had taken vehicle to dealership, and mechanic could not locate the cause of the problem.