Quickly alternate between your custom power calibrations and transmission shifting profiles on the move with our collection of heavy-duty multi-position manual rotary control selector switches. Configured specifically to integrate line-for-line with premium Duramax custom tuning maps like DSP3 and DSP5 calibration setups, these hardware switches allow you to adapt your truck's performance curves instantly without opening a laptop. This catalog contains durable dash-mounted selector switches, high-conductivity wiring harness leads, and precise terminal pins engineered specifically for classic LB7, LLY, LBZ, and LML Duramax pickups. Transition seamlessly from a conservative fuel economy mapping profile to an aggressive towing calibration file or a max-effort track tuning chart safely right from the driver's seat of your Chevy or GMC truck.
