Sir Coil Assembly
WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
SIR coil assembly consists of 2 or more current-carrying coils. SIR coil assembly is attached to steering column and allows rotation of steering wheel, while maintaining continuous continuity of driver-side air bag module deployment loop.