Sir Coil Assembly
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. 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 is are attached to steering column and allows rotation of steering wheel, while maintaining continuous continuity of driver-side air bag module deployment loop.