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Standard Ignition SC838 Vehicle Speed Sensor
| Brand | Standard Ignition SC838 |
|---|---|
| Attachment Method | Bolt on |
| Color/Finish | Black, blue |
| Connector Gender | Male |
| Connector Quantity | 1 |
| Connector Shape | Rectangular |
| Connector Type | Plug |
| Dust Shield Included | No |
| Hardware Included | Bolt |
| Harness Length - inches | 4 |
| Harness Length - mm | 101.6 |
| Mounting Bracket(s) Included | No |
| Mounting Hardware Included | Yes |
| Mounting Hole Quantity | 1 |
| Mounting Location | On transimission |
| Mounting Type | Bolt mount |
| New or Reman | New |
| Number of Bolt Holes | 1 |
| Number of wires | 2 |
| Terminal Gender | Female |
| Terminal Quantity | 2 |
| Terminal Type | Blade |
| Wiring Harness Included | Yes |
| Fits | Chevrolet and GMC · 20 vehicles |
Bolt-on installation. Includes mounting hardware for a straightforward replacement.
New sensor. Freshly manufactured for dependable speed signal performance.
Plug connector. Uses a rectangular male connector with a two-wire harness.
Cross-references 24043906, SN8539 and VSS1372 for the same application. See all 4.
Vehicle Speed Sensor for Silverado and Sierra HD
Standard Ignition SC838 is a new vehicle speed sensor built for transmission-mounted applications on select heavy-duty Chevrolet and GMC trucks. It uses a bolt-on design with a rectangular male plug, a 2-wire harness, and included wiring harness for a direct replacement on the listed fitments.
Key Features
- Vehicle speed sensor for transmission mounting
- Bolt-on attachment with one mounting hole
- Rectangular 1-connector design with male terminal gender
- 2-wire setup with female blade terminals
- Black and blue finish
- Harness length: 4 in. (101.6 mm)
- New replacement part from Standard Ignition
- Part number SC838
Detailed Description
Standard Ignition SC838 is a transmission-mounted vehicle speed sensor for 2020-2024 Chevrolet Silverado 2500 HD, 2020-2024 Chevrolet Silverado 3500 HD, 2020-2024 GMC Sierra 2500 HD, and 2020-2024 GMC Sierra 3500 HD. It is built with a bolt mount, one bolt hole, and included mounting hardware for a secure installation at the transmission. The sensor uses a rectangular plug connection and a short integrated harness to match the original-style electrical interface on the listed applications. If you are replacing a failed Silverado 2500 HD or Sierra 3500 HD speed sensor, SC838 provides a direct-fit service part for the specified front-position applications.
This part cross-references 24043906 and SN8539 for the same application.
Common Issues This Part Can Help Resolve
- Inaccurate vehicle speed signal to the control system
- Speedometer fluctuation or loss of speed reading
- Transmission shift concerns related to vehicle speed input
- Diagnostic trouble codes tied to the speed sensor circuit
- Intermittent signal loss from a worn or damaged sensor
Installation Notes and Tips
Install SC838 at the transmission using the bolt-on mounting point and verify the connector shape, terminal style, and harness routing before final assembly. Confirm the vehicle application by year, make, model, and front-position fitment for Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, or GMC Sierra 3500 HD. Inspect the connector and wiring path for corrosion, damage, or strain that could affect the new sensor signal.
Quality Assurance
Standard Ignition supplies this as a new replacement sensor built to match the listed electrical and mounting specifications for the confirmed applications.
| Year | Make | Model | Fuel Type | Notes |
|---|---|---|---|---|
| 2024 | Chevrolet | Silverado 2500 HD | — | Front |
| 2024 | Chevrolet | Silverado 3500 HD | — | Front |
| 2024 | GMC | Sierra 2500 HD | — | Front |
| 2024 | GMC | Sierra 3500 HD | — | Front |
| 2023 | Chevrolet | Silverado 2500 HD | DIESEL | Front |
| 2023 | Chevrolet | Silverado 3500 HD | DIESEL | Front |
| 2023 | GMC | Sierra 2500 HD | DIESEL | Front |
| 2023 | GMC | Sierra 3500 HD | DIESEL | Front |
| 2022 | Chevrolet | Silverado 2500 HD | — | Front |
| 2022 | Chevrolet | Silverado 3500 HD | — | Front |
| 2022 | GMC | Sierra 2500 HD | — | Front |
| 2022 | GMC | Sierra 3500 HD | — | Front |
| 2021 | Chevrolet | Silverado 2500 HD | — | Front |
| 2021 | Chevrolet | Silverado 3500 HD | — | Front |
| 2021 | GMC | Sierra 2500 HD | — | Front |
| 2021 | GMC | Sierra 3500 HD | — | Front |
| 2020 | Chevrolet | Silverado 2500 HD | — | Front |
| 2020 | Chevrolet | Silverado 3500 HD | — | Front |
| 2020 | GMC | Sierra 2500 HD | — | Front |
| 2020 | GMC | Sierra 3500 HD | — | Front |
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