Prenco 4D-1039 Engine Crankshaft Position Sensor

Engine Crankshaft Position Sensor for GM Applications

Prenco 4D-1039 is an engine crankshaft position sensor built for direct replacement on a wide range of GM vehicles. It uses a 1-connector, 4-terminal blade-style design with an oblong female connector and male terminals for a straightforward OE-style electrical connection.

Compatible With Buick LeSabre, Park Avenue, Regal, Riviera, Century, Skylark, Allure, LaCrosse, and Lucerne; Chevrolet Impala, Monte Carlo, Camaro, Lumina, and Lumina APV; Pontiac Grand Prix, Bonneville, Firebird, Trans Sport, and Grand Am; and selected Oldsmobile models across 1993-2009 applications. Prenco 4D-1039 is also a direct cross-reference for Standard Ignition PC30 and Spectra Premium S10145 applications.

Key Features

• Engine crankshaft position sensor for ignition and engine management systems
• Blade terminal type with 4 terminals for OE-style electrical interface
• 1 oblong female connector for a secure harness connection
• Mounting bracket not included
• Direct replacement format for many Buick, Chevrolet, Pontiac, and Oldsmobile applications
• Part number: 4D-1039

Detailed Description

The Prenco 4D-1039 crankshaft position sensor monitors crankshaft position and rotational speed so the engine control system can manage ignition timing and fuel delivery. This sensor is used across many GM platforms, including Buick Regal and LeSabre, Chevrolet Impala and Monte Carlo, and Pontiac Grand Prix and Bonneville. The connector layout and terminal configuration are designed to match the original electrical connection on supported vehicles, helping maintain proper signal transfer to the engine control module. If you are replacing a failing crank sensor on a 2000-2005 Chevrolet Impala or a 1997-2008 Pontiac Grand Prix, this part number provides a direct-fit replacement path. Part number 4D-1039 is also listed as an interchange for Anchor 9655, Standard Ignition PC30, and Spectra Premium S10145.

What It Helps Address

• Crankshaft position signal loss
• Intermittent no-start conditions
• Engine stalling or sudden shutdown
• Rough running caused by incorrect ignition timing input
• Check engine light concerns related to crank sensor performance

Installation Notes and Tips

Verify connector shape, terminal count, and vehicle application before installation. This sensor uses a female connector with male blade terminals and does not include a mounting bracket. Confirm the original sensor location and harness routing on the vehicle before removing the old unit. For best results, inspect the connector for corrosion or damaged terminals and clear any stored diagnostic trouble codes after installation.

Quality Assurance

Prenco replacement sensors are built to match the electrical and fitment requirements of supported applications. Confirm vehicle year, make, and model against the fitment list before ordering to ensure proper application coverage.