Replacement internal automatic transmission range switch for select Chevrolet® Silverado and GMC® Sierra heavy-duty trucks equipped with a compatible six-speed Allison® transmission.
Also identified as an internal mode switch, neutral safety switch, transmission range sensor, neutral start/back-up switch, or selector lever position switch, this component communicates the selected transmission range to the vehicle’s electronic control system.
Important: This is an internal transmission switch associated with reference number 29542692. It is not the external NSBU switch used on earlier Allison transmission configurations. Confirm the transmission model, production year, VIN, connector configuration, and existing switch number before ordering.
Features & Benefits
- Replacement for transmission switch reference 29542692
- Designed for select six-speed Allison® transmission applications
- Reports the transmission selector position to the vehicle control system
- Supports the starting, reverse-light, and transmission-range control circuits
- Six-terminal electrical configuration
- Rectangular female connector with male blade terminals
- Suitable for professional transmission service and repair
Product Information
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California Diesel SKU: SENSS01
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Primary Reference Number: 29542692
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Component: Internal Automatic Transmission Range Switch
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Alternative Names: Internal Mode Switch, Neutral Safety Switch, NSBU Switch, Range Sensor, Selector Lever Position Switch
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Transmission Family: Applicable Allison® 1000/2000 Series
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Transmission Configuration: Select six-speed applications
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Voltage: 12 Volt
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Terminal Quantity: 6
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Terminal Type: Male Blade
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Connector Gender: Female
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Connector Shape: Rectangular
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Connector Quantity: 1
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Mounting Hardware Included: No
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Gasket or Seal Included: No
Compatible Applications
Cataloged applications may include the following vehicles when equipped with the compatible six-speed Allison® transmission:
Chevrolet® Applications
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Silverado 2500 HD: select 2006–2019 models
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Silverado 2500 HD Classic: select 2007 models
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Silverado 3500: select 2006 models
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Silverado 3500 Classic: select 2007 models
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Silverado 3500 HD: select 2007–2019 models
GMC® Applications
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Sierra 2500 HD: select 2006–2019 models
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Sierra 2500 HD Classic: select 2007 models
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Sierra 3500: select 2006 models
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Sierra 3500 Classic: select 2007 models
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Sierra 3500 HD: select 2007–2019 models
Applications commonly include Allison®-equipped Duramax® 6.6L platforms such as LBZ, LMM, LML, and L5P. Additional gasoline or alternative-fuel configurations may be cataloged, but engine displacement alone does not confirm compatibility.
Fitment requirement: The vehicle must have the compatible transmission and internal switch configuration. Verify the VIN, transmission identification, existing switch number, and electrical connector before purchase.
Cross-Reference Numbers
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29542692 — Primary transmission switch reference
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NS691 / NS-691 — Standard® reference
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SW9337 — Duralast® / Wells® reference
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511-106 / 511106 — Dorman® reference
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1S12272 — Airtex® / WVE® reference
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CSW588 — BWD® reference
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NS7093 — Echlin® reference
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50-1607 / 501607 — Rostra® reference
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V51-73-0151 / V51730151 — Vemo® reference
Cross-reference numbers are supplied solely for product identification and compatibility research. They do not indicate that this AEPD replacement component was manufactured or supplied by the referenced companies.
Condition & Packaging
This item is new and unused AEPD inventory. Due to warehouse storage and handling, the component or its packaging may show minor cosmetic marks, surface discoloration, shelf wear, label wear, or other evidence of prior handling. These cosmetic conditions do not affect the product’s intended function. Supplied in neutral protective packaging unless otherwise shown.
Professional Installation
This switch is located inside the transmission and may require transmission-pan and valve-body access. Correct installation, selector adjustment, fluid service, electronic diagnosis, and post-installation verification should be completed by a qualified transmission technician.
A range-switch or transmission-range diagnostic trouble code does not by itself confirm that the switch has failed. Inspect the internal wiring harness, connectors, transmission fluid condition, selector mechanism, and related circuits before replacement.
California Diesel Note
Please provide the VIN, transmission identification, model year, and existing switch number if assistance is needed confirming compatibility.
Legal Compliance
Third-party brand names, trademarks, and application references are used solely for product identification and compatibility information. They remain the property of their respective owners. Such references do not imply that this component is manufactured, authorized, or endorsed by those trademark owners.
California Proposition 65
⚠ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov.
