D201XHD Regulator 12 Volt, B-Circuit, P-L-I-S Terminals, 14.8 Vset, 2.5 sec. LRC For: Delco AD230 Series IR/IF Alternators Used On: (1999) Chevrolet, GMC Replaces: Delco 10494747 (regulator stamped: 4747 or regulator rectifier assy. stamped: 4743) Unit Nos: Delco 10480229 Lester Nos: 8238 Note: Designed for DR4402, DR4403 series rectifiers w/ screw down collar. Features: Heavy Duty ASVR Design OE compliant functions performance: current limiting, thermal shutdown, load dump protection, shorted field lamp circuit protection Welded construction - no solder joints for hi-temperature reliability increased field life