Restore your vehicle's throttle response and drivability with this Genuine GM 78mm 3-Bolt Throttle Body, part number 19420713 (also replaces GM #12679525). Specifically designed for 2003–2006 GM trucks and SUVs, this OEM unit ensures proper fitment and functionality on 4.8L, 5.3L, and 6.0L Gen III LS-based engines. Whether you're dealing with a failing throttle body, poor idle, hesitation, or drive-by-wire issues, this GM throttle body is the correct OE solution—not a remanufactured or aftermarket alternative. The 78mm diameter and 3-bolt design make it the go-to option for factory replacements and LS truck builds maintaining stock air intake systems. Compatible with popular engines including LM7, LQ4, LR4, L59, L33, LQ9, and LM4, this throttle body is a drop-in solution that brings your vehicle's performance back to factory spec.