DB Electrical ADR0217 New Alternator 4.3L 4.3 4.8L 4.8 5.3L 5.3 6.0L 6.0 1500 2500 Silverado Sierra Pickup 99 00 01 02 1999 2000 2001 2002 112853 321-1749 321-1803 321-1813 321-1816 321-2123 10464405 100% New aftermarket alternator built to meet OEM specifications 1-year warranty protects you after your purchase Factory direct pricing with no middleman markup delivers exceptional value Fits: Chevy, Cadillac, GMC 4.3L V6, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L, 6.5L Dsl, 6.6L, 8.1L V8 engines in Escalade, Avalanche, C K R V Pickups, Silverados, Suburban, Express, Tahoe, Savannah, Sierra, Yukon Specs: Alternator, 12V, CW, 130A, Pulley Class S6, 6-Groove Pulley 56mm