Heated signal mirrors were an option for all years., plus the factory ones look better than those. IMO Could be the angle, but those look too round, and too small.I came across these today. Was this a factory option?
Product Description:Chevrolet Avalanche 02-04 Heated Signal Mirrors. Driving safely gets attention with lighted exterior rearview Signal® Mirrors by Muth Mirror Systems. Flashing LED chevrons alert drivers in your blind spot of your intention to turn or change lanes. This allows you plenty of time to reduce the chance of an accident. Ideal for towing boats or RVs, too. Order a complete retrofit for your car or truck. Signal Mirrors use high-intensity LED lamps to turn ordinary exterior rearview mirrors into safety features that command attention. When a turn signal is activated, a flashing chevron < appears in the corresponding side mirror to alert drivers in the "blind spot" of your intentions. When emergency hazard flashers are used, both mirrors flash warning signals. The mirrors function as conventional rearview mirrors when the signals or hazards are not activated. Signal Mirrors fit 2002 2003 2004 Chevrolet Avalanche