ACDelco 16003M Dual I.D. Molded HVAC Heater Hose GM OE Replacement

The ACDelco Gold 16003M (OEM cross-reference: 88907245) is a Dual I.D. molded HVAC heater hose engineered as a premium aftermarket replacement for GM vehicles. Designed to restore proper coolant flow between the engine and heater core, this factory-molded hose delivers the precise fit and routing of the original equipment part it replaces.

Key Features:

• Dual I.D. design — features two different internal diameters in a single molded hose to match OE plumbing configurations
• GM OE-style molded construction — pre-formed to fit today's tighter, more compact engine compartments without buckling or straining at the connection points
• EPDM rubber construction — proprietary blend of synthetic rubber that is highly pliable, extends hose life, and resists electrochemical degradation (ECD), the leading cause of hose failure
• Wide temperature range — rated from -40°F to 275°F (-40°C to 135°C) for reliable performance in extreme conditions
• Multi-application compatibility — suitable for coolant, water, and air applications; also approved for marine use
• Broad coverage — ACDelco's molded heater hose line uses fewer than 500 part numbers to cover more than 1,200 applications

The ACDelco 16003M is part of the ACDelco Gold (Professional) line — a high-quality OE alternative backed by General Motors for both GM and non-GM vehicles. This hose is not intended for fuel or oil transfer applications. For a reliable, direct-fit heater hose replacement, the ACDelco 16003M delivers the durability and precision fit that technicians and DIYers depend on.