A-Premium Engine Position Sensor 2-Pack — Camshaft & Crankshaft Replacement Pair (Black Housing, Direct-Fit for GM 1999–2007)

A-Premium's 2-pack includes one camshaft position sensor and one crankshaft position sensor engineered as direct-fit replacements for many GM and related vehicles from late 1990s through mid-2000s.

If your engine is showing rough idle, intermittent stalling, or trouble starting, a failing camshaft or crankshaft position sensor is a common cause. This A-Premium pair is designed to restore accurate timing signals to the engine control module in select Cadillac, Chevrolet, GMC, Pontiac, Buick, Hummer, Isuzu and commercial models. Each sensor is built with a black housing, blade-style terminals, and arrives boxed — the cam and crank sensors are supplied together so you can replace both critical timing inputs at once.

Which vehicles will these A-Premium sensors fit?

The pair covers a broad range of GM platforms and some other makes from model years roughly 1999–2007. Fitment includes sedans, full-size trucks, SUVs, vans and a few performance cars. Always verify part numbers or vehicle compatibility before purchase.

• Cadillac CTS 2004–2005; Escalade (EXT) 2002–2006; Escalade ESV 2003–2006
• Chevrolet Avalanche 1500 (2002–2006), Camaro (1999–2002), Corvette and Silverado 2500 (1999–2004)
• Express 1500/2500/3500 (2003–2007); Silverado 1500 (1999–2006); Silverado Classic and HD variants (2001–2007)
• GMC Sierra, Yukon, Envoy variants, plus Hummer H2 (2003–2007) and Isuzu Ascender (2003–2004)

How do these sensors match original equipment references?

A-Premium lists cross-reference numbers to help confirm fitment against OEM and aftermarket catalogs. If your original part number matches one of the references below, these sensors are intended as replacements.

• Common cross-references: PC273, PC278, PC278T, PC273T
• OEM-style numbers: 12555566, 12560228, 12561211, 19420372, 19420911
• Additional IDs: 21333, 2351057, SS10206, CAM68 and several numeric codes for broad compatibility

What are the technical details and package contents?

These sensors use blade-type terminals with either two or three pins depending on the specific unit; the housings are black and they come boxed. The pair contains one camshaft position sensor and one crankshaft position sensor for convenience during replacement.

• Terminal types: blade with 2 or 3 pins as specified per application
• Color and finish: black molded plastic housings designed for OEM-style installation
• Package: 1x camshaft position sensor + 1x crankshaft position sensor in a box

What warranty and support come with the A-Premium sensors?

A-Premium backs this cam/crank sensor set with a one-year unlimited-mileage guarantee and customer support for fitment questions. The warranty covers manufacturing defects under normal use, giving you time to confirm fit and performance.

• Coverage: one-year unlimited-mileage warranty
• Support: A-Premium assistance for compatibility or installation queries
• Packaging: shipped boxed to protect terminals and connectors during transit

Who is this for? This 2-pack is aimed at DIY mechanics, independent shops and fleets running older GM-based vehicles who prefer to replace both timing sensors together to reduce diagnostic time and avoid future failures. If your vehicle matches the listed models or the OEM reference numbers, these A-Premium sensors provide a cost-effective direct-fit option with a warranty and broad cross-reference compatibility. Always confirm exact terminal count and connector orientation against your original parts before installation, and consult a qualified technician if you are unsure about sensor replacement procedures.