DB Electrical HO-8237Bk-250 Amp High Output Black Powder Alternator for 4.3, 5.0, 5.3, 5.7, 6.5,7.4 Chevy Gmc C K Series Silverado Suburban Tahoe Sierra Yukon (96,97,98,99,00,01,02,03,04,05) 100% New aftermarket high output alternator built to meet OEM specifications 1-year warranty protects you after your purchase Factory direct pricing with no middleman markup delivers exceptional value Specs: Under full load conditions, amperage output at 1200 engine rpm will peak at 250 Amps, amperage output at 600 engine rpm (idle) will peak at 125 Amps