ACDelco 12603992 Positive Crankcase Ventilation PCV Tube

The ACDelco 12603992 is a genuine GM OE positive crankcase ventilation (PCV) tube designed to maintain proper crankcase pressure and ventilation in your vehicle's engine. This tube is a critical component of the emissions control system, routing crankcase vapors from the engine back into the intake manifold for reburning.

Key Features:

• Genuine GM OE part ensures exact fit and original equipment quality
• Durable construction designed to withstand engine heat and vibration
• Maintains proper crankcase ventilation to prevent oil leaks and pressure buildup
• Direct replacement for worn or damaged PCV tubing
• Helps maintain optimal engine performance and emissions compliance

A functioning PCV system is essential for engine longevity and performance. Failed or damaged PCV tubing can cause rough idle, oil leaks, increased emissions, and potential engine damage from improper crankcase ventilation. Replace your PCV tube at the first sign of cracking, hardening, or oil contamination to maintain your vehicle's performance and pass emissions testing.