The typical total cost to replace all six fuel injectors on a Cadillac CTS is around $1,800 to $3,500 (as of 2024–2026), depending on engine type, injector design, parts quality, and local labor rates. If only one or two injectors are faulty, the bill will be much lower.
How injector type and model year affect price
The Cadillac CTS used several engines during its production, including variants with direct injection (DI) and, in some years, port injection. Direct-injection injectors tend to be more expensive and require more labor because access often involves removing the intake manifold and related components. Labor times can vary based on engine layout, which affects the overall cost and time needed for replacement.
Cost factors that influence the price
Prices vary by model year, engine, and whether you replace all six injectors or only a subset. The following factors are the main drivers of the total bill:
- Number of injectors replaced (one vs all six).
- Injector type and brand (OEM/GM vs aftermarket; direct-injection units are typically pricier).
- Labor time and local shop labor rates (hourly cost and time required).
- Additional components or services required (fuel rails/seals, O-rings, intake manifold gaskets, spark plugs, and cleaning of intake passages).
- Diagnostic charges, core charges, and any warranty or service package.
Understanding these factors helps explain why quotes can vary between shops for the same vehicle.
Typical cost ranges for common scenarios
Prices shown are approximate ranges based on common CTS configurations and current market conditions. They can vary by region, year, and shop.
- All six injectors replaced on a CTS with a 3.6L direct-injected engine: typically $1,800 to $3,500 total.
- Replacing two injectors: typically $600 to $1,400 total, depending on location and access requirements.
- Replacing a single injector: typically $180 to $900 total, depending on access time and whether other components are involved.
Higher-end quotes may apply if OEM GM parts are used, labor rates are higher, or additional services (like gasket replacement or fuel rail work) are required.
What to ask your mechanic before the work
To avoid surprises and ensure you get what you need, ask for a written, itemized estimate that includes parts, labor, and any related services. Helpful questions include:
- Are the injectors OEM GM or aftermarket equivalents, and do they carry a warranty?
- Is the price for all six injectors or only the identified faulty units?
- Will the job include replacing related seals, gaskets, or the intake manifold if needed?
- What is the hourly labor rate and estimated total hours for the job?
- Will a fuel system leak check and misfire diagnostic be performed after installation?
Budgeting tip: request a pre-work diagnostic to confirm exactly which injectors are faulty and to identify any related issues that could affect the price.
Summary
Replacing fuel injectors on a Cadillac CTS is a sizeable repair with a broad price range. For a full six-injector replacement, expect roughly $1,800 to $3,500, with variation based on engine type (DI vs non-DI), injector brands, labor rates, and any additional services required. If only one or two injectors need replacement, the cost will be substantially lower. Always obtain an itemized estimate and consider whether you want OEM parts, warranties, or aftermarket alternatives based on your budget and vehicle use.