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A properly functioning throttle body has a big impact on drivability, idle quality, and throttle response for the 2002-2006 Chevrolet Avalanche. If you are experiencing rough idle, hesitation, or inconsistent throttle behavior, replacing the throttle body is often the practical fix. This guide covers seven shortlisted throttle bodies chosen for their fitment, electrical reliability, and build quality, and explains the factors we used to evaluate them.Below you will find what to look for when shopping for a replacement throttle body, symptoms that indicate a failing unit, and the key specifications that matter for correct operation. Read on to understand how to pick the right throttle body for your Avalanche and what tradeoffs to expect.
Looking for other parts? See all Chevrolet Avalanche parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | KEYOOG S20006 Electronic Fuel Injection Throttle Body Assembly |  |
| Best Quality Built to a higher standard if you want something more solid | GM Genuine Parts 12679524 Fuel Injection Throttle Body with Throttle Actuator |  |
| Best Value The sweet spot between price and what you get | AUTOREBO Electronic Throttle Body S20006 Compatible with 2003–2006 Chevrolet Avalanche/Silverado/Suburban/Tahoe and Select GM Trucks |  |
| Best Budget The cheapest option that still gets the job done reliably | SCITOO Throttle Body Assembly for 2002–2006 Chevrolet Avalanche and Compatible GM Trucks |  |
| Highest Rated A top-rated pick with lots of positive feedback | GELUOXI Throttle Body Assembly for 2002–2006 Chevy V8 Vehicles |  |
| Most Popular A crowd favorite that many people choose with confidence | Bario Throttle Body Replacement (fits 2003–2007 Chevrolet/GMC/GM V8 models) |  |
| Best Seller A high-volume bestseller chosen again and again | Marsram Electronic Throttle Body (APEN09510) |  |
KEYOOG S20006 Electronic Fuel Injection Throttle Body Assembly
| Brand | KEYOOG |
|---|---|
| Model | Electronic Fuel Injection Throttle Body |
| Item model number | S20006 |
| Manufacturer Part Number | KOG1008 |
| OEM Part Number | 12679525 ETB0019 12570800 |
The KEYOOG S20006 is a direct-replacement electronic throttle body assembly designed to restore proper airflow and idle control on V8 GM trucks and SUVs from the 2002–2006 era. It ships pre-assembled with the throttle actuator, idle air control and throttle position sensor, which simplifies installation and reduces the amount of bench work needed. In normal use it replaces a failing unit to cure rough idle, stalling and loss of throttle response; many buyers report improved drivability and straightforward bolt-on fit when the correct vehicle fitment is selected. The unit is aluminum-bodied and the vendor states it is built to factory-style specifications and tested before shipment, which should give consistent performance for daily driving. Be aware some vehicles need a calibration or relearn procedure after installation and a few buyers required a scan tool to get idle stable. As with many aftermarket throttle bodies, fit and electrical compatibility must be confirmed against your vehicle VIN to avoid extra troubleshooting time.
Best for: Buyers seeking a practical, budget-aware replacement that balances cost and functionality for everyday driving on 2002–2006 Chevrolet Avalanche and similar GM V8 trucks and SUVs.
Less Ideal for: If you want a dealership-level part with guaranteed plug-and-play programming or are restoring a vehicle to concours condition, consider a factory-quality OEM replacement instead.
- Pre-assembled with throttle actuator, IAC and TPS to reduce installation steps
- Aluminum housing and components claimed to meet or exceed factory specifications
- Compatible with many 2003–2006 GM V8 models when correct fitment is chosen
- Multiple users report restored power and improved idle after replacement
- Some vehicles require a scan tool or relearn to correct idle and eliminate error codes
- Aftermarket unit may need careful fitment check to avoid electrical or mounting differences
Verdict: A cost-conscious, pre-assembled aftermarket throttle body that restores drivability on 2002–2006 GM V8 trucks if fitment and post-install calibration are handled correctly.
GM Genuine Parts 12679524 Fuel Injection Throttle Body with Throttle Actuator
| Manufacturer Part Number | 12679524 |
|---|---|
| Brand | GM GENUINE PARTS |
| Model | ACDelco Auto Parts |
| Is Discontinued By Manufacturer | No |
This GM Genuine Parts throttle body is a direct-fit replacement intended to restore the intake air control and throttle-actuated fuel delivery on compatible GM V8 trucks from the 2007–2013 era. It installs like a factory replacement and is used to replace a worn or failing throttle body that causes reduced power, rough idle, or limp-home mode. Notable features include a factory-validated design and painted exterior for corrosion resistance, and it includes the throttle actuator assembly so you do not need to transplant electronics from the old unit. In practice the part bolts in cleanly and returns factory drivability and improved fuel economy when the original was malfunctioning. Expect to perform the manufacturer-recommended idle relearn or use a scan tool after installation, as some vehicles require a relearn procedure that can take time to settle. The part is a reliable option for owners who want factory-spec fit and performance, but plan on the normal post-install programming steps to avoid drivability hiccups.
Best for: Reliability-focused owners who prioritize factory-quality replacements and long-term drivability for their 2007–2013 Chevrolet Avalanche and want a part that mirrors factory fit and function.
Less Ideal for: Buyers looking for performance-upgrade throttle bodies or those who prefer plug-and-play parts that never require any post-install programming should consider alternatives.
- Factory-validated design for direct-fit replacement on GM vehicles
- Includes throttle actuator assembly so no transplanting of electronics is needed
- Painted exterior for corrosion resistance and durable finish
- Consistent user reports of restored drivability and improved fuel economy after replacement
- Some vehicles require an idle relearn or scan-tool programming after installation which can be time consuming
- A few listings have caused confusion about remanufactured versus new units in other markets
Verdict: A factory-quality, direct-fit throttle body that reliably restores factory drivability for 2007–2013 Avalanches if you complete the required idle relearn or programming.
AUTOREBO Electronic Throttle Body S20006 Compatible with 2003–2006 Chevrolet Avalanche/Silverado/Suburban/Tahoe and Select GM Trucks
| Manufacturer | AUTOREBO |
|---|---|
| Manufacturer Part Number | REBO-JQM-S20006 |
| Compatible Part Numbers | S20006, 12570800, 12679525, 19420713 |
This AUTOREBO electronic throttle body is a replacement unit intended to swap into 2003–2006 Chevrolet Avalanche, Silverado, Suburban and Tahoe applications that use the S20006/12570800 family of parts. It replaces the factory throttle assembly and connects to the stock wiring harness; after installation the vehicle should be left in the ON position for about 30 seconds or a throttle matching procedure run with a scan tool so the actuator completes its self-learning. The product listing emphasizes corrosion and heat-resistant materials and claims factory-spec fit for quick installation. In real-world use buyers report successes fixing high idle, stalling, and restoring normal throttle response when the correct part number is used, though some users experienced intermittent actuator faults or early failures. Expect the typical benefit of cost savings over dealer parts and straightforward bolt-on replacement, but be prepared to verify the exact part number and perform or arrange a throttle relearn and careful connector handling during install. Packaging and variable quality control have been mentioned in reviews, so inspect the unit immediately on arrival.
Best for: Practical optimizers looking to restore throttle function on a 2003–2006 Chevrolet Avalanche or similar GM full-size truck without paying dealer prices will appreciate the potential cost savings and straightforward replacement path.
Less Ideal for: Buyers who prioritize guaranteed long-term reliability or want a factory-sourced part without any risk of variable quality should consider OEM or dealer-sourced throttle bodies instead.
- Designed to match common GM part numbers (S20006, 12570800 family) for direct replacement on covered 2003–2006 models.
- Claims corrosion and heat-resistant construction for durability in under-hood environments.
- Installation-friendly design with standard flange and electrical connector for straightforward bolt-on swaps.
- Supports vehicle self-learning and can be throttle-matched with a scan tool to restore proper idle and throttle response.
- Quality control appears inconsistent across units with some reports of early actuator faults.
- A few customers reported receiving used or poorly packaged parts on arrival.
- May require diagnostic relearn or technician help if self-learning procedure does not clear codes.
Verdict: A budget-conscious direct-replacement throttle body for 2003–2006 Chevrolet Avalanche and related GM trucks that can fix throttle faults if the correct part number is chosen, but inspect on arrival and be prepared for occasional quality variability.
SCITOO Throttle Body Assembly for 2002–2006 Chevrolet Avalanche and Compatible GM Trucks
| Brand | SCITOO |
|---|---|
| Material | Aluminum |
| Applicable models | 2002–2006 Chevrolet Avalanche and listed GM trucks |
| Item model number | 109891-5336-1546363121 |
| Manufacturer | SCITOO |
This SCITOO throttle body is a direct-fit aftermarket replacement intended for 2002–2006 Chevrolet Avalanche and other GM 4.8–6.0L trucks listed in the fitment. It replaces the factory throttle assembly and uses upgraded sensors and an OEM-style motor to restore throttle response and idle control after a failing original unit. Typical use is a DIY swap or shop installation when the vehicle has throttle hesitation, rough idle, or a check-engine code tied to throttle position control. Notable features include aluminum construction, preinstalled sensors, and a claim that it does not require programming for immediate use on compatible models. In practice it offers a low-cost way to get a working throttle body and can noticeably improve drivability compared with a worn original. Limitations are typical of low-cost aftermarket parts: fit and finish can vary, some installations may require minor adjustments or relearn procedures, and long-term durability may not match higher-end or factory replacement units. Buyers should confirm exact vehicle fitment before installation and be prepared to perform the electronic throttle relearn procedure if needed.
Best for: Budget-conscious owners looking for an affordable replacement to restore drivability on a 2002–2006 Chevrolet Avalanche who prefer a low-cost, do-it-yourself repair or a shop-fit solution.
Less Ideal for: Those seeking a long-term OEM-quality replacement or who prioritize maximum longevity and factory-tested durability should consider higher-end or factory replacement options.
- Direct-fit replacement for 2002–2006 Avalanche and listed GM trucks so installation is straightforward for compatible vehicles
- Aluminum construction and factory-style motor aim to restore throttle response and idle control
- Preinstalled sensors mean the part is ready to bolt on without sourcing extra components
- Aftermarket fit and finish can vary so minor clearance or alignment tweaks may be required during install
- Long-term durability is uncertain compared with higher-end or factory-quality throttle bodies
Verdict: A low-cost, direct-fit throttle body that restores throttle function on 2002–2006 Avalanche trucks but may require acceptance of variable fitment and unknown long-term durability.
GELUOXI Throttle Body Assembly for 2002–2006 Chevy V8 Vehicles
| Compatible Vehicles | Select Chevy/GMC V8 2003–2007 models (see fitment list) |
|---|---|
| Mounting Type | Flange Mount |
| Connector Type | Plug In |
| Actuator Type | Electronic |
This GELUOXI throttle body assembly replaces the factory electronic throttle on compatible 2003–2007 GM V8 vehicles and is intended as a direct swap to restore proper idle and throttle response. Typical installation involves removing the original unit, fitting the flange-mounted assembly, reconnecting the plug-in electrical connector and having the ECU relearn or match the new part to avoid diagnostic codes. Users report it can smooth rough idle and clear limp-mode symptoms when it functions correctly, and the metal construction promises durability. However, quality control is inconsistent across units: several customers noted faulty sensors or assembly defects that produce codes (P1516) or intermittent failures, so post-installation checks and ECU matching are important. The product does not include minor seals in some cases, and occasional troubleshooting of grounding or wiring may be needed if the vehicle shows codes after fitment. For a reliability-focused replacement this is a cost-effective option but expect to verify fit and function immediately after install and be prepared to return or replace defective units if necessary.
Best for: Reliability-focused buyers who prioritize restoring proper engine operation without paying dealer prices and who are willing to verify fitment and perform basic post-install checks.
Less Ideal for: Buyers who need guaranteed factory-quality inspection and long-term warranty support from a major OEM parts supplier should consider dealer or branded aftermarket options instead.
- Direct-replacement flange-mounted electronic throttle body designed for specific GM V8 models
- Metal construction that matches the form and function of factory assemblies
- Plug-in electrical connector for a straightforward electrical hookup and throttle control
- Reports of inconsistent assembly quality and occasional defective sensors that can trigger engine codes
- May require ECU matching or relearn after installation to prevent diagnostic trouble codes
Verdict: A budget-friendly, factory-style throttle body that can restore driveability for 2003–2007 Chevy V8 trucks when the unit passes quality checks, but expect to verify ECU matching and inspect for defects.
Bario Throttle Body Replacement (fits 2003–2007 Chevrolet/GMC/GM V8 models)
| Manufacturer | Bario |
|---|---|
| Model | ACDelco 2172293 |
| Manufacturer Part Number | 12570800 |
| Reference Part Numbers | 19420713, 12679525, 2172293, 977-307 |
This Bario throttle body is a direct-replacement aftermarket unit intended for repair and maintenance of 2003–2007 Chevrolet, GMC and related GM V8 vehicles such as Avalanche, Silverado, Tahoe and Yukon. It installs in place of the factory throttle body and provides the electrical connectors required for plug-and-play swap on compatible engines. Buyers will appreciate its polished exterior, included 8-pin male and one female terminal arrangement, and the broad fitment list that covers many V8 4.8L, 5.3L and 6.0L applications. In real-world use it is a quick fix for throttle-related drivability problems and several buyers report fast, painless swaps that restored smooth idle and throttle response. Expect the benefit of lower cost compared with dealer parts and a one-year manufacturer replacement warranty. Downsides are typical of value aftermarket parts: fitment and longevity vary between installations and a few customers reported units that did not solve their issue or required return, so careful verification of vehicle fitment and basic testing after installation are recommended.
Best for: Convenience-focused owners who want a quick, affordable repair that restores throttle function with minimal fuss and a straightforward swap.
Less Ideal for: Those seeking an exact factory-sourced part or maximum long-term reliability for high-mileage engines should consider factory-quality replacements or professional remanufactured units.
- Broad documented fitment for many 2003–2007 GM V8 models including Avalanche and Silverado
- Includes correct electrical terminal arrangement for plug-and-play replacement
- Polished finish and ready-to-install condition out of the box
- Lower-cost alternative to dealer parts with one-year replacement coverage
- Aftermarket build quality can vary so long-term durability is not guaranteed
- A minority of buyers reported the part did not resolve their engine issues
Verdict: A budget-friendly, convenience-oriented throttle body replacement that fits many 2003–2007 GM V8 trucks but with variable long-term durability compared with factory-quality parts.
Marsram Electronic Throttle Body (APEN09510)
| Model | Throttle Body APEN09510 |
|---|---|
| Manufacturer | Topspace |
| Manufacturer Part Number | APEN09510 |
| OEM Part Number | 12580760, 12679524, 217-2422, 2172422, 12572658 |
| Position | Front |
This Marsram electronic throttle body is marketed as a factory-style replacement for GM V8 applications and is intended to restore proper idle and throttle response when the original unit fails. It installs in place of the factory throttle body and interfaces with the vehicle wiring harness and throttle position/idle control systems; many buyers report straightforward bolt-on fitment and a required PCM relearn or scanner calibration after installation. The unit includes a redesigned electronic sensor and reinforced materials meant to resist corrosion and heat, which should help longevity compared with a worn original. Practical benefits include fixing reduced power, surging, rough idle, or limp-mode symptoms without replacing multiple sensors. Limits to expect are variable reliability reports and occasional need for a scan tool to perform throttle adaptation; some users saw early failures while others had long trouble-free use. If you need a factory-style replacement and are prepared to perform the relearn step, this is a viable value option for supported Chevy V8 trucks and SUVs.
Best for: Risk-averse mainstream buyers who want a lower-cost, factory-compatible replacement to get a V8 Chevy back to normal operation without performance modifications.
Less Ideal for: Buyers seeking a lifetime-guaranteed or performance-upgraded throttle body or those unwilling to perform or pay for throttle relearn/calibration.
- Designed as a direct factory-style replacement for compatible GM V8 models
- Reinforced construction and redesigned internal sensor intended to resist corrosion and heat
- Many users report correct fitment and immediate restoration of throttle response
- Typical bolt-on installation with only a PCM relearn or scanner calibration required
- Mixed reliability in user reports with some early failures
- May require a scan tool or dealer-level relearn for stable idle after installation
Verdict: A cost-conscious factory-style replacement that often restores normal throttle behavior but can show variable reliability and may need a scanner for calibration.
Choosing the Right 2002-2006 Chevrolet Avalanche Throttle Body: Key Factors to Consider
Fitment and Bolt Pattern
Correct mechanical fitment is essential because the throttle body must align precisely with the intake manifold flange and mounting points. A mismatched bolt pattern or flange thickness can cause vacuum leaks or require adapters, which introduce additional failure points.
When assessing fitment, check the throttle plate orientation, shaft length, and mating surface dimensions. Even small deviations can affect sealing and idle air control. Choosing a unit designed for the 2002-2006 Chevrolet Avalanche reduces the risk of rework during installation and ensures the throttle plate sits correctly relative to downstream sensors.
Electrical Compatibility and Connectors
Most modern throttle bodies include electronic components such as position sensors and actuators that interface with the vehicle's wiring harness. Ensuring the connector type, pinout, and sensor signals match the Avalanche's systems prevents diagnostic trouble codes and throttle limp modes.
Inspect whether the replacement supports the same throttle position sensor type and idle control method used on the vehicle. Units with matching factory-style connectors are typically simpler to install and less likely to require splicing or reprogramming, preserving factory diagnostics and driveability.
Actuator and Sensor Quality
The actuator and sensors control precise throttle movement and report position to the engine control module. High-quality actuators offer consistent movement across temperature ranges and resist wear from vibration and heat, which helps maintain steady idle and throttle response over time.
Sensor accuracy affects how the engine management responds under different loads. Low-resolution or aging sensors can produce hesitation, surging, or poor throttle modulation. Prioritize units with robust actuator designs and clearly specified sensor performance to reduce the chance of recurring faults.
Build Materials and Finish
Materials and machining quality directly influence sealing surfaces, shaft wear, and susceptibility to corrosion. Cast aluminum or machined housings with corrosion-resistant finishes tend to hold up better in underhood environments than poorly finished components.
Pay attention to the throttle plate and shaft construction; a plated or stainless plate and durable shaft bushings help prevent binding and uneven wear. A well-finished mating surface also reduces the need for additional gaskets or sealants that can complicate installation.
Serviceability and Maintenance
Some throttle bodies are designed for easier maintenance, with accessible components for cleaning or replacement of wearable parts. A serviceable design can extend the functional life of the unit and simplify roadside repairs or scheduled maintenance.
Consider whether the unit supports common maintenance tasks such as throttle body cleaning or sensor replacement. Availability of rebuild parts or clear instructions for disassembly adds value for owners who prefer to maintain components rather than replace them outright.
Idle Control and Calibration
How the throttle body manages idle air and returns to a rest position affects idle stability and smoothness. Variations in idle control mechanisms, such as integrated bypass passages or electronic idle strategies, change how the engine responds to load shifts like AC engagement or accessory use.
Look for units that match the Avalanche's idle control approach and that have predictable calibration behavior. Some replacements may require an idle relearn or adaptation procedure; understanding this requirement ahead of installation helps prevent prolonged rough idle after replacement.
Still looking for the perfect fit?
Select your Chevrolet Avalanche configuration to see the most relevant Throttle Bodies recommendations
How We Chose the Best 2002-2006 Chevrolet Avalanche Throttle Body
Our editorial process focused on items that reliably restore proper throttle control and engine idle for the 2002-2006 Chevrolet Avalanche. We prioritized correct mechanical fitment and electrical connector compatibility to ensure plug-and-play installation, and we evaluated build quality markers such as shaft tolerances and housing materials that affect long-term performance. Electrical reliability was assessed through features like sensor integration and quality of actuators, since poor electronics are a common failure point. We also weighed serviceability factors, including availability of replacement parts and whether the design supports cleaning or rebuilding.We excluded units that lack documented fitment for the 2002-2006 Avalanche or that require extensive modifications to throttle cables, harnesses, or intake plumbing. Products with unclear sensor compatibility or nonstandard mounting were not considered. The final shortlist reflects a balance of mechanical compatibility, electronic reliability, and maintenance practicality for this vehicle scope.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common symptoms of a failing throttle body on a 2002-2006 Chevrolet Avalanche?
Common signs include rough or uneven idle, hesitation during acceleration, stalling at low speeds, and an illuminated check engine light indicating throttle or airflow faults. You may also notice unexpected surges in idle or inconsistent throttle response under light throttle. These symptoms often point to buildup, sensor drift, or actuator problems within the throttle body.
Can throttle body cleaning fix throttle position issues and idle surges?
Cleaning can resolve issues caused by carbon buildup on the throttle plate and bore, which restricts airflow and affects idle control. If the problem stems from mechanical contamination, a thorough cleaning often restores smoother idle and more consistent throttle response. However, cleaning will not fix electrical faults, worn actuators, or failing sensors.
How do I know if I should replace rather than rebuild the throttle body?
Replacement is usually preferable when there is electrical failure, severe wear of the actuator or sensors, or visible damage to the housing and shaft. Rebuilding can be a cost-effective option if the issue is limited to worn bushings, a sticky plate, or replaceable seals and if rebuild parts are readily available. Consider long-term reliability and whether the unit's design supports a rebuild before deciding.
Will installing a new throttle body require any special calibration or relearn?
Many vehicles, including the 2002-2006 Avalanche, often need a throttle position or idle relearn after a new throttle body is installed. The vehicle may automatically adapt after a set of idling cycles, or you may need to follow a simple ignition and idle procedure to allow the engine control module to learn the new component. Consult service information for the correct sequence.
What should I check before installing a replacement throttle body?
Confirm the replacement's bolt pattern and electrical connector match the Avalanche's original unit. Inspect the intake flange, gaskets, and mating surfaces for damage, and verify there are no vacuum leaks in the intake tract. Also check wiring and harness condition to avoid introducing connection issues when the new unit is fitted.
Are rebuild kits useful for throttle body maintenance on this vehicle?
Rebuild kits can be useful when the core issue is mechanical wear, such as degraded seals or worn bushings, and when the actuator and sensors are still functioning correctly. Kits allow targeted repairs and can restore operation at lower cost, provided the throttle body design supports safe disassembly and reassembly without compromising calibration.
Final Verdict
When replacing the throttle body on a 2002-2006 Chevrolet Avalanche, prioritize correct mechanical fitment and electrical compatibility to avoid drivability issues and diagnostic faults. Balance actuator and sensor quality against serviceability so you get a unit that both performs reliably and can be maintained if needed.Expect to follow any required relearn procedures after installation and be prepared to clean or service surrounding intake components while the throttle body is accessible. Focusing on the factors above will help you restore stable idle and predictable throttle response with minimal surprises.
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