How does this compare to acdelco 217-2422 ? listing indicates newer model bought the original last spring have a whistling sound -cold weather starts

No whistling sound in the one I purchased recently, I also added a TB spacer, added power and improved gas mileage. It was an Air Raid by Power Aid

Will this work on a 2006 trailblazer ss 6.0ls2?

Unsure my engine is the 5.3 liter v8.

Does it require a trip to dealer for TPS relearn?

No.... Important: Do NOT perform this procedure if DTCs are set. Without Scan Tool - Learn Procedure 1. Start and idle the engine in PARK for 3 minutes. 2. With a scan tool, monitor desired and actual RPM. 3. The ECM will start to learn the new idle cells and Desired RPM should start to decrease. 4. Ignition OFF for 60 seconds. 5. Start and idle the engine in PARK for 3 minutes. 6. After the 3 minute run time the engine should be idling normal. Important: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn. ^ If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles. 7. After the drive cycle, the engine should be idling normally. ^ If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds and repeat step 6. 8. Once the engine speed has returned to normal, clear DTCs and return to the diagnostic that referred you here.

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⚡ Upgrade your ride with GM Genuine Parts – where precision meets power!

SEAMLESS DIRECT FIT REPLACEMENT - Fits perfectly with your existing setup—no modifications needed, saving you time and hassle.
OPTIMIZED FUEL INJECTION CONTROL - Houses throttle plates and fuel injectors to ensure efficient air-fuel mixture and smooth acceleration.
DURABLE OEM QUALITY CONSTRUCTION - Painted exterior and robust materials guarantee long-lasting performance under demanding conditions.
BACKED BY GENERAL MOTORS ASSURANCE - Genuine GM part ensures compatibility and quality trusted by professionals and enthusiasts alike.
PRECISION ENGINEERED FOR PEAK PERFORMANCE - Designed and tested to rigorous GM standards for reliable fuel system control.

The GM Genuine Parts 12679524 Fuel Injection Throttle Body is a direct-fit, OEM-quality replacement part engineered by General Motors. It controls air intake and fuel injection for optimal engine performance, ensuring reliable, efficient, and safe vehicle operation. Designed for easy installation and durability, this throttle body restores your vehicle’s fuel system functionality to factory standards.

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Manufacturer	ACDelco
Brand	GM
Model	ACDelco Auto Parts
Item Weight	2.65 pounds
Product Dimensions	10.38 x 6.38 x 4.75 inches
Item model number	12679524
Is Discontinued By Manufacturer	No
Exterior	Painted
Manufacturer Part Number	12679524
OEM Part Number	12679524

GM Genuine Parts 12679524 Fuel Injection Throttle Body with Throttle Actuator

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