HVAC Heater Core for Chevy Silverado 1500, GMC Sierra 1500 (2003–2006)

Includes:
- HVAC Heater Core

Fits Models:
- Chevrolet Silverado 1500
- GMC Sierra 1500

Model Years:
- 2003–2006

Submodels:
- Common trims include WT (Work Truck), LS, LT, and LTZ
- Chassis codes: GMT800
- Body styles: Crew Cab, Extended Cab, Regular Cab

Engine Options:
- Common engine sizes include 4.3L V6, 4.8L V8, 5.3L V8, 6.0L V8
- Engine codes: L33, LM7, L59, LQ4

Description:
This HVAC Heater Core is designed specifically for the 2003–2006 Chevrolet Silverado 1500 and GMC Sierra 1500 models. It effectively transfers heat from the engine coolant to the cabin, ensuring a comfortable driving experience during colder months.

Features:
- Direct fit replacement for easy installation
- Durable construction for long-lasting performance
- Enhances cabin heating efficiency
- Compatible with various engine options
- Designed to meet or exceed OEM specifications