Holstein 2OPS0021 Engine Oil Pressure Switch

Engine Oil Pressure Switch Overview

The Holstein engine oil pressure switch is a direct-fit replacement for a wide range of GM applications that use either a warning light or gauge signal. Part number 2OPS0021 is built for vehicles that need accurate oil pressure input to the instrument cluster or engine monitoring system.

Compatible with Chevrolet, GMC, Buick, Cadillac, Pontiac, Saturn, Saab, Suzuki, Hummer, Isuzu, and Oldsmobile applications, this switch covers many common GM platforms. Part number 2OPS0021 is a practical choice when the original switch is no longer reading correctly or the warning system is acting up.

Key Features

• Engine oil pressure switch for oil pressure warning and gauge applications
• Direct-fit replacement for multiple GM platforms
• Supports light-based and gauge-based oil pressure systems
• Holstein Parts branded replacement component
• Cross-references Monroe Shocks & Struts 172286 and 182286 for the same application

Detailed Description

Holstein 2OPS0021 is an engine oil pressure switch used in a broad range of GM vehicles, including the Chevrolet Impala, Chevrolet Traverse, GMC Acadia, and Buick Enclave. Fitment includes applications with a light, applications with a gauge, and a 2-terminal configuration on select models, so matching the original system type is important before ordering. The part number 2OPS0021 also appears across several related GM crossover, SUV, and truck platforms.

Because oil pressure switches feed the dash warning system or gauge circuit, a failing unit can create false warnings, an inoperative gauge, or inconsistent oil pressure readings. This replacement is intended for direct service on the listed vehicles and should be matched to the exact fitment notes shown for each application.

Common Issues This Part Can Address

• Oil pressure warning light stays on or behaves erratically
• Oil pressure gauge reads incorrectly or stops responding
• Intermittent oil pressure signal to the instrument cluster
• Faulty switch causing inconsistent dashboard indications
• Replacement needed after electrical or sensor wear

Installation Notes and Tips

Verify the vehicle year, make, model, and fitment note before installation, especially where the listing specifies with light, with gauge, or 2 terminal. Compare the original connector style and system type to confirm the correct application for your Chevrolet Impala, GMC Acadia, or other listed model. Always follow the vehicle service procedure for removal and replacement of the oil pressure switch.

Quality Assurance

Holstein Parts offers this replacement under the Holstein Parts line, with broad application coverage across GM platforms. The part number 2OPS0021 also cross-references Monroe Shocks & Struts 172286 and 182286 for the same application.