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Squeaks and rattles from interior components in automobiles are annoying and manufacturers are working to minimise or eliminate them. Many of the squeaks and rattles emanate from sliding contacts of interior plastic components. In this paper the friction characteristics, and mechanical and chemical properties of like-pairs of plastics are reported. The plastics are polypropylene (PP), polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS), polyamide 6 (PA6), polyoxymethylene (POM), PC/ABS blend and ABS/PA blend. A tensile tester was used to measure the friction force of the plastics sliding on themselves. When stick-slip occurred during sliding the amplitude of the stick-slip was used to characterise the tendency for the sliding pairs to make noise. The effect of the normal load, stiffness of the connection between the force transducer and the sliding polymer, the temperature, surface roughness and sliding speed on the amplitude of the stick-slip were determined.