A coil pack for a 2005 Cadillac DeVille typically costs between about $60 and $180 per unit, depending on whether you buy aftermarket or OEM. The DeVille (with the Northstar V8) uses eight coil-on-plug ignition coils, so budgeting for a full replacement means eight individual coils rather than a single “pack.”
Understanding the ignition setup in the 2005 DeVille
The 2005 DeVille uses a Northstar 4.6L V8 engine with coil-on-plug ignition. That means each cylinder has its own ignition coil, so a complete replacement involves eight separate coils. Prices and availability can vary by retailer, and some shops may sell remanufactured or aftermarket options that differ from GM’s original equipment.
Typical price range for a single coil pack
Prices vary by supplier and by whether the part is OEM-GM, aftermarket, or remanufactured. Here are the common ranges you’ll see across major parts retailers and distributors.
- OEM GM ignition coils: typically $120–$180 per coil.
- Aftermarket ignition coils (non-OEM brands): typically $60–$120 per coil.
- Remanufactured or rebuilt coils: typically $50–$100 per coil.
When shopping, verify that the coil is designed for coil-on-plug ignition and compatible with the Northstar 4.6L V8 in the 2005 DeVille. Prices can fluctuate with demand and availability.
Cost to replace all eight coils (parts and labor)
Because the DeVille uses eight coils, the total price is eight times the per-coil cost, plus labor. Labor costs vary by shop and region.
- All OEM coils: parts roughly $960–$1,440 for eight coils; labor commonly $200–$600; estimated installed total around $1,160–$2,040.
- All aftermarket coils: parts roughly $480–$960 for eight coils; labor commonly $200–$600; estimated installed total around $680–$1,560.
Note that some shops offer discounts when replacing multiple coils at once, and regional pricing for labor can shift these totals. Always request a full parts-and-labor quote before authorizing work.
Buying tips
Tips for choosing coils include confirming compatibility with the Northstar engine, checking warranty terms (especially for aftermarket parts), and considering manufacturer recommendations or recalls. If you’re unsure, consulting a qualified mechanic to confirm the correct part number can prevent misfits or misfires.
What to expect in practice
Replacing eight ignition coils is a moderately involved task that can affect ignition performance and engine reliability. If you’re experiencing misfires, rough running, or reduced fuel economy, a faulty coil is a common culprit. A diagnostic check can help confirm whether multiple cylinders are affected and if coil replacement is warranted.
Summary
For a 2005 Cadillac DeVille with the Northstar V8, expect to pay roughly $60–$180 per coil, with OEM parts toward the higher end and aftermarket parts toward the lower end. A full eight-coil replacement, including parts and labor, typically ranges from about $680 to $2,040, depending on part type and local labor rates. Always verify compatibility for the Northstar engine and obtain a detailed, itemized quote before proceeding.
How much is a 2005 Cadillac DeVille worth today?
The value of a used 2005 Cadillac DeVille ranges from $306 to $1,090, based on vehicle condition, mileage, and options. Get a free appraisal here.
What are the most common issues with a 2005 Cadillac DeVille?
Top 2005 Cadillac DeVille Problems
- Power Window Regulators may Fail.
- Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail.
- Oil Leaks From Lower Engine Area.
- Car Won't Start Because of Anti-Theft System That Uses Raised-Chip Key.
- TCC Inop Due to Internal Transmission Fault.
- Fuel Level Sensor Failure.
What are the common repairs on a DeVille?
Top Cadillac DeVille Problems
- Steering Wheel Position Sensor May Fail.
- Misfire Due to Failed Ignition Coil.
- Leaking Water Pump May Cause Coolant Loss and Overheating.
- Air conditioning compressor may leak or become noisy.
- Fuel injectors can short-circuit.
- ABS Light Due to ABS Control Module Failure.
- Fuel Level Sensor Failure.
What's the average price of a coil pack?
The average cost to replace an ignition coil is between $230 and $330, according to RepairPal. This cost includes both labor and parts. Labor is estimated at $75 to $100, while the cost of parts typically ranges from about $155 to $230.