Chevrolet Avalanche 2007-2013 Vehicle Speed Sensor Guide
Experiencing a jumpy speedometer or harsh shifting in your Avalanche? Your vehicle speed sensor might be the culprit.
- A faulty Vehicle Speed Sensor can cause an erratic speedometer, harsh shifting, and disabled cruise control.
- Warning lights for ABS or Stabilitrak often point to a failed wheel speed sensor, not the main VSS.
- For best results, choose OEM-equivalent brands like ACDelco or Delphi; they offer guaranteed fit and performance.
- Replacing the main VSS is a simple DIY job, typically located on the transfer case and held by one bolt.
Understanding the Speed Sensor in Your Avalanche
In the 2007-2013 Chevrolet Avalanche, the term "Vehicle Speed Sensor" can refer to a few different parts. Most commonly, it's the sensor located on the transmission or transfer case that measures output speed for the speedometer and transmission shifting. However, your truck also has wheel speed sensors at each wheel hub that report data to the Anti-lock Brake System (ABS) and Stabilitrak stability control system. Often, a failure in a wheel speed sensor will cause ABS and traction control warning lights, while a failure of the main VSS on the transmission will cause speedometer and shifting problems. A preliminary service bulletin from GM noted that an erratic speedometer or ABS messages could sometimes be caused by an internal issue within the transfer case, where the tone wheel that the sensor reads moves out of position, rather than a failure of the sensor itself.
🎬 Learn how to test if your speed sensor has failed.Top Aftermarket Brands for Your Avalanche
When replacing a failed speed sensor, you have several options. The choice often comes down to a balance of cost, quality, and how long you plan to keep your truck.
- Tier 1: OEM & OEM-Equivalent Brands (ACDelco, Delphi)
ACDelco is General Motors' own parts brand, offering the original equipment (OE) part that your truck was built with. Delphi was also a major original equipment supplier for GM. Choosing either of these brands ensures a perfect fit and original performance. They are the most reliable choices but also the most expensive in the aftermarket space. - Tier 2: Reputable Aftermarket Brands (Standard Ignition, Walker Products, Holstein)
Brands like Standard Ignition and Walker Products are well-known in the aftermarket for producing reliable electronic sensors. They offer a good balance of quality and price, often meeting or exceeding OEM specifications without the premium price tag. These are a solid choice for most owners looking for a durable repair. - Tier 3: Economy Brands (Dorman, URO Parts, True Tech)
Dorman is known for creating a wide range of aftermarket parts and sometimes re-engineering them to fix common flaws. However, quality can sometimes be inconsistent compared to higher-tier brands. URO Parts and other economy brands offer the lowest price point, which can be appealing for a quick fix or a vehicle nearing the end of its life. While functional, their long-term durability may not match that of the premium brands.
Cost at a Glance: 2007-2013 Avalanche Speed Sensor
| Part Type | Typical Price Range |
|---|---|
| New OEM (ACDelco) | $45 - $105 |
| New Aftermarket | $22 - $83 |
| Shop Labor for Replacement | $75 - $150 |
Frequently Asked Questions
Where is the vehicle speed sensor located on my Avalanche?
For the main vehicle speed signal, the sensor is typically located on the rear of the transmission or, on 4WD models, on the transfer case. It's a small sensor held in by a single bolt with a wiring connector. There are also individual wheel speed sensors located at each wheel hub as part of the ABS.
Is this a difficult part to replace myself?
Replacing the main VSS on the transmission/transfer case is a relatively easy job for a DIY mechanic. It usually requires sliding under the truck, unplugging the electrical connector, removing one bolt, and swapping the sensor. Access can be tight. Replacing a wheel speed sensor is more involved, as it often requires removing the wheel and brake components to access the sensor on the hub.
🎬 Watch a step-by-step guide to replacing front wheel hub sensors.Are there any recalls for the speed sensor on my truck?
There are no specific recalls for the vehicle speed sensor itself on the 2007-2013 Chevrolet Avalanche. However, there was a GM Technical Service Bulletin (TSB) that mentioned an erratic speedometer could be caused by an internal transfer case issue, not just a bad sensor. The Avalanche from this generation was included in the major Takata airbag recall.
What do the OBD-II codes P0502 and P0503 mean?
These are common codes related to VSS failure. P0502 means the sensor circuit has low voltage, which could be a bad sensor or a wiring issue. P0503 indicates the sensor signal is intermittent, erratic, or too high, which can cause the speedometer to jump around.
🎬 See common signs of a bad vehicle speed sensor.Helpful Videos
Technical Specifications
OEM Part Numbers: 19302667 24225896 24278523 84356647
The 2007-2013 Avalanche uses both a main Vehicle Speed Sensor (VSS) on the transmission/transfer case and individual ABS wheel speed sensors at each wheel hub. The main VSS is typically a magnetic sensor that generates a pulse signal as a toothed reluctor wheel spins. The ABS sensors are similar and often come integrated with the wheel hub bearing assembly.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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