Shop OEM GENERAL MOTORS Part # 84861595 (84693378). HVAC Unit Case (Upper, Lower). Regular cab, w/dual zone cntrl, w/o reinf heater. Silverado, Sierra 2500 HD; Upper; w/Dual Zone Control

Case.
HVAC Unit Case. Air distributor. Assembly - Heater and Air Conditioning (A/C) Evaporator. Cover. HVAC Unit. Valve.

HVAC Unit Case

Fits Sierra 1500, Sierra 1500 Limited, Sierra 2500 HD, Sierra 3500 HD, Silverado

Regular cab, w/dual zone cntrl, w/o reinf heater. Silverado, Sierra 2500 HD; Upper; w/Dual Zone Control; Regular Cab; w/o Reinforced Heater. Silverado, Sierra 3500 HD; Upper; w/Dual Zone Control; Regular Cab; w/o Reinforced Heater. Silverado, Sierra; Upper; Front Auto/Aux Controls; w/Reinforced Heating; w/o Frt Row Center Seat. W/dual-zone.