Walker 235-91081 Engine Crankshaft Position Sensor

Engine Crankshaft Position Sensor for GM Applications

Walker Products FSK 235-91081 is an engine crankshaft position sensor built for precise engine timing signal input in a wide range of GM trucks, vans, SUVs, and utility vehicles. It is a direct-fit replacement for many Chevrolet Silverado 1500 and GMC Sierra 1500 applications, along with other 1994-2007 models listed below.

Key Features

• Engine crankshaft position sensor for ignition and engine management systems
• Black housing with 1 male connector
• 2 mounting holes with mounting bracket included
• Built to meet or exceed OEM standards and specifications
• Walker Products FSK line backed by engineering, product management, and technical support
• Cross-reference: Standard Ignition PC123

Product Details

Walker Products has supplied automotive fuel system and engine management components since 1946. The Walker Products FSK line focuses on accurate replacement parts for ignition and sensor applications, including crankshaft and camshaft sensors, throttle position sensors, oxygen sensors, fuel injectors, and related engine management components. Part number 235-91081 is designed for vehicles that rely on a stable crankshaft signal for ignition timing and engine control. Compatible With 1999-2007 Chevrolet Silverado 1500, 1999-2007 GMC Sierra 1500, 1996-2007 Chevrolet Express 1500, and other listed Chevrolet, GMC, Cadillac, Oldsmobile, and Isuzu applications.

Common Problems This Sensor Can Address

• Hard starting or extended crank time
• Intermittent stalling or engine shutdown
• Check engine light related to crankshaft signal faults
• Misfire or rough running caused by incorrect timing input
• No-start conditions when the crank signal is lost

Installation Notes and Tips

Verify connector style, mounting hole count, and bracket configuration before installation. This sensor uses a single male connector and a two-hole mounting pattern, so matching the original part is important for proper fitment. Confirm vehicle application by year, make, and model before ordering, especially on Chevrolet Silverado 1500, GMC Sierra 1500, and other GM platforms with multiple engine configurations.

Quality Assurance

Walker Products manufactures engine sensors to meet or exceed OEM standards and specifications. The company is ISO 9001 and IATF 16949 certified, with in-house engineering and technical support used to maintain application accuracy and product quality. Part number 235-91081 is part of the Walker Products FSK line for dependable replacement in supported GM applications.