Blower motor resistor burnt out?. Blower Motor Fan High Speed Resistor. FITS: 99-06 1500 Chevy Silverado and GMC Sierra, 01-06 1500HD, 2007 1500 2500 3500 CLASSIC HD, 2002-06 Chevy Tahoe and GMC Yukon, Suburban 2000-06 02-06 Chevy Avalanche and Cadillac Escalade, 99-04 2500, 01-06 2500HD, 01-06 3500.
