Buy OEM 2004 Buick Part # 10374359. HVAC Blend Door. Temp-rear, lower. HVAC Blend Door - Repair or Replace In some cases, albeit relatively rare ones, a blend door in your

HVAC Air Door. HVAC Blend Door. HVAC Mix Door. HVAC Temperature Door. Valve.
HVAC Blend Door.

HVAC Blend Door

Fits Lucerne

Temp-rear, lower.
HVAC Blend Door - Repair or Replace
In some cases, albeit relatively rare ones, a blend door in your HVAC system can break, causing air to come out of the wrong vents or at the wrong temperature, or not to come out at all. Properly diagnosing such a problem in your 2004 Buick is best left to technicians with factory training and expertise.