Larlansz Oil Pressure Sensor Kit for 2003-2008 Chevy/GMC Full-Size SUVs & Trucks — Aluminum Sensor, 1-1/16" Socket

The Larlansz oil pressure sensor and removal socket kit is a direct-fit replacement sending unit designed to restore accurate oil pressure readings on many 2003–2008 GM cars, trucks and SUVs.

If your instrument cluster shows erratic or low oil pressure readings, a worn or clogged sending unit is often the cause. This Larlansz kit includes a machined aluminum oil pressure sensor, a protective filter, and a dedicated 1-1/16" socket so you can swap the part quickly and without improvising tools. It’s built to fit a wide range of Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac and Saab models that use the OE-style 12677836/12616646/12573107 equivalent.

Which vehicles and engines will this sensor work with?

This sending unit is compatible with numerous GM platforms from the model years listed, including common pickups and full-size SUVs. It supports multiple V6 and V8 displacements used across Chevrolet, GMC, Cadillac and select other brands, but always double-check your OEM part number before ordering.

• Fits Chevrolet: Silverado, Tahoe, Suburban, Avalanche, Impala, Corvette, Express, SSR, Monte Carlo (select years)
• Fits GMC: Sierra, Yukon, Savana, Envoy and related XL/XUV models (select years)
• Also compatible with Buick, Cadillac, Hummer H2, Isuzu, Pontiac and Saab models using equivalent part numbers
• Engine coverage includes many 4.8L, 5.3L, 6.0L, 6.2L and select 5.7L/7.0L applications

How is this sensor built and why does that matter?

The Larlansz sensor uses lightweight aluminum with corrosion-resistant finishing to endure under-hood heat and oil exposure. A stable mechanical build and included filter reduce contamination-related failures, helping the instrument panel receive cleaner, more consistent signals.

• Aluminum housing resists rust and keeps unit light
• Pre-mounted filter screens debris that can affect readings
• Precision threads and electrical terminal match OE fitment for reliable installation

What’s included and how does installation look?

The kit contains the sensor, a replacement inline filter, and a 1-1/16" socket sized for the sender—this eliminates the need to jury-rig tools. Installation is typically straightforward at the oil pressure sending port; basic hand tools and moderate mechanical experience are sufficient for most DIYers.

• 1 x oil pressure sensor (Larlansz replacement)
• 1 x protective filter element for the sender
• 1 x 1-1/16" socket (fits 3/8" drive or 1-1/8" hex wrench)
• Recommended: verify vehicle year/make/model and test system after fitting

Will this fix a fluctuating or incorrect oil gauge?

Replacing a faulty or clogged sending unit commonly resolves unstable or inaccurate oil pressure gauge readings, though wiring, ground connections, and the instrument cluster itself can also cause issues. Use the included replacement and the socket to check the sender quickly before diagnosing more involved electrical faults.

• Restores accurate sender-to-cluster signal when sender is the issue
• Filter helps prevent premature re-clogging from particulates
• Use a multimeter or shop scanner to rule out wiring/cluster problems if symptoms persist

Who is this for: This Larlansz oil pressure sensor and socket kit is aimed at owners and DIY mechanics of GM trucks, SUVs and cars from the mid-2000s who need a direct, cost-effective replacement for a malfunctioning oil pressure sending unit. It’s also useful for fleet maintenance shops and home garages that want the correct socket included to speed repairs and avoid thread or terminal damage during removal and installation.