For a 2002 Chevy Trailblazer, a camshaft position sensor (CMP) part typically costs about $25 to $120, with OEM/Delco units usually at the higher end. Installed, total cost commonly runs from roughly $100 to $250 depending on engine type and labor.
The exact price depends on the Trailblazer’s engine variant (4.2L inline-six or 5.3L V8 in some trims), the supplier (aftermarket vs OEM), and whether you hire a mechanic or do the replacement yourself. Core charges may apply for remanufactured units, and dealer prices are generally higher than those at independent parts stores.
Prices by part type and retailer
Prices can vary by supplier and the sensor’s design. Here is a general guide to what you might pay for the CMP sensor for this model.
- Aftermarket / non-OEM CMP sensor: typically $15 to $45
- OEM GM Delco CMP sensor: typically $40 to $120
- Dealership-sourced sensor (GM brand, often with higher labor quotes): typically $100 to $180+ for the part, with labor added if you’re having a shop install
When shopping, consider whether the part includes mounting hardware or a warranty, and whether you’ll need a core charge for remanufactured units. Labor for installation, if needed, is usually extra and varies by region.
Compatibility and part numbers
Because the Trailblazer offered different engines, ensure the sensor you buy matches your exact engine code (4.2L I6 or 5.3L V8) and the correct sensor type for your VIN. Using the wrong sensor can lead to fitment issues or intermittent faults.
What affects the price
Several factors influence the cost of a camshaft position sensor for this vehicle. Here is a quick breakdown of the major price drivers.
- Engine variant: The Trailblazer could have a 4.2L I6 or a 5.3L V8; part numbers and sensor designs differ, affecting price.
- Source: Aftermarket sensors are typically cheaper than GM/OEM-branded parts.
- Condition: New sensors cost more than remanufactured units; warranties vary by seller.
- Dealer vs. store: Dealerships usually price higher than independent parts retailers.
- Core charges: Remanufactured units may require a core deposit that’s refunded when you return the old sensor.
Prices can vary by retailer and region, so it’s wise to check multiple sources for the exact part required for your engine code and VIN.
Estimated price ranges by source
Below is a snapshot of common price bands to help you plan. The ranges reflect typical U.S. retail pricing as of the mid-2020s and may shift with promotions or regional differences.
- Aftermarket / non-OEM sensors: roughly $15 to $45
- OEM GM / Delco sensors: roughly $40 to $120
- Dealership-part sensors (GM brand, with or without labor): roughly $100 to $180+ for the part, plus potential labor charges
Some kits include mounting hardware or a replacement harness, which can add a small amount to the price. If you plan to install it yourself, you’ll save on labor; professional installation typically runs about $60 to $150 depending on location and shop rates.
Where to buy and how to save
Smart shopping can trim costs without compromising reliability. Consider these strategies when buying a CMP sensor for your Trailblazer.
- Verify the exact part number by engine code and VIN to avoid compatibility issues.
- Compare multiple retailers (AutoZone, Advance Auto Parts, O'Reilly, RockAuto, and GM dealerships) for the best price.
- Consider refurbished or remanufactured options with warranty if you’re comfortable with used components.
- Look for online promos or coupons that can drop the price further.
If you’re not ready to DIY, get a labor quote from a shop to understand the full installed cost and ensure proper sensor calibration and electrical connections.
Summary
The camshaft position sensor for a 2002 Chevy Trailblazer generally costs between $25 and $120 for the part, with total installed costs typically ranging from about $100 to $250 depending on engine type, supplier, and labor. By confirming the exact sensor required for your VIN and comparing prices across several retailers, you can find a fair price and avoid overpaying.
For the most accurate figure, verify your engine code and VIN, then check current prices from multiple retailers or your local dealership before purchasing.