AMP Research 19-03970-91 PowerStep Replacement OBD-II Module 2014-2023 Chevy GMC

Vehicle Fitment

• 2014-2019 Chevrolet Silverado 1500 (WT, LS, LT, LTZ, High Country, Custom, SSV)
• 2019 Chevrolet Silverado 1500 LD (WT, LT, Custom)
• 2015-2019 Chevrolet Silverado 2500 HD (WT, LT, LTZ, High Country)
• 2015-2019 Chevrolet Silverado 3500 HD (WT, LT, LTZ, High Country)
• 2014-2018 GMC Sierra 1500 (Base, SLE, SLT, Denali)
• 2019 GMC Sierra 1500 Limited (Base, SLE)
• 2015-2019 GMC Sierra 2500 HD (Base, SLE, SLT, Denali)
• 2015-2019 GMC Sierra 3500 HD (Base, SLE, SLT, Denali)
• 2014-2023 Cadillac, Chevrolet, and GMC vehicles equipped with AMP Research PowerStep Plug-N-Play systems using OBD-II integration - verify compatibility with AMP Research before ordering outside the confirmed range above

Fitment Notes

• This is a replacement OBD-II module for AMP Research PowerStep Plug-N-Play running boards already installed on the vehicle - it is NOT a complete running board kit or wiring harness
• Compatible only with AMP Research PowerStep Plug-N-Play systems that use an OBD-II port for door-signal integration - does not apply to non-plug-n-play or hardwired PowerStep installations
• This module is GM platform-specific - the OBD-II connector and communication protocol are specific to the covered GM vehicles and are not interchangeable with Ford, Ram, Toyota, or other brand-specific OBD-II modules
• Verify the series and part number of the AMP Research PowerStep currently installed before ordering - if unsure, contact AMP Research / RealTruck support prior to purchase
• This product is non-returnable and non-refundable unless the part arrives defective - all sales are final
• Some wiring is required during installation - this is not a fully tool-free swap

Features

• Replacement OBD-II module specifically engineered to restore reliable electrical communication between the vehicle's OBD-II port and the AMP Research PowerStep Plug-N-Play control system on covered GM platforms
• Resolves intermittent deployment and retraction failures caused by a loose, corroded, or physically damaged OBD-II module connector in the existing plug-and-play wiring harness
• Includes a brand-new OBD-II module with a 2-wire pigtail for seamless integration into the original wiring harness - no full harness replacement required
• Restores automatic door-triggered PowerStep deployment and retraction: steps extend when any door opens and retract approximately 2 seconds after all doors close
• GM-platform-specific connector design ensures proper fit with the OBD-II port pinout on covered Chevrolet Silverado and GMC Sierra models without modification or adapters
• Backed by AMP Research's limited warranty against manufacturing defects

Specifications

• Part Type: Replacement OBD-II module with 2-wire pigtail
• Color: Black
• Application: AMP Research PowerStep Plug-N-Play systems - GM platform-specific
• Compatible PowerStep Type: Plug-N-Play (OBD-II integration) only - not for hardwired installations
• Wiring Required: Yes - some wiring integration needed during installation
• Weight: 0.08 lbs.
• Package Dimensions: 5.8" L x 3.8" W x 1.0" H
• Returns: Non-returnable / non-refundable unless defective
• Warranty: Limited (AMP Research)

Included Components

• 1x Replacement OBD-II module with 2-wire pigtail (GM-specific connector)
• Note: Wiring harness, running boards, motors, and mounting hardware are NOT included - this is a module replacement part only

Product Description

The AMP Research 19-03970-91 is a replacement OBD-II module designed to restore proper function to AMP Research PowerStep Plug-N-Play running boards installed on 2014-2023 Chevrolet and GMC trucks and SUVs, including the Silverado 1500, Silverado 2500HD, Silverado 3500HD, Sierra 1500, Sierra 2500HD, Sierra 3500HD, and Cadillac vehicles within the covered range. The PowerStep Plug-N-Play system uses the vehicle's OBD-II port as the primary signal source for door-status monitoring - when a door opens, the module detects the change and signals the PowerStep motors to deploy the steps. When the OBD-II module becomes loose, corroded, or physically damaged from road vibration or moisture intrusion, the steps may deploy erratically, fail to retract, or stop responding to door inputs entirely.

This replacement module includes a new OBD-II connector with a 2-wire pigtail that integrates directly into the existing wiring harness - eliminating the need to replace the entire harness when the module alone is the point of failure. The GM-specific connector is designed to match the OBD-II port pinout on the covered Chevrolet and GMC platforms, and the installation involves some wiring work to splice the new pigtail into the original harness. The part is classified as a Plug-N-Play PowerStep component, which means it is only compatible with AMP Research PowerStep kits that were originally configured to use OBD-II port integration for door-signal sensing - not with older hardwired installations that use a conventional wiring controller.

Before ordering, confirm the specific AMP Research PowerStep part number and series installed on the vehicle, as AMP Research produces multiple OBD-II module variants that are platform-specific and not interchangeable across GM, Ford, Ram, or other vehicle architectures. If the installed kit's part number is unknown, AMP Research's technical support can assist in identifying the correct replacement. This is a final-sale item - all purchases are non-returnable and non-refundable unless the module arrives with a confirmed manufacturing defect.