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2004 Cadillac CTS

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By Research the Car 4 min read

The 2004 Cadillac CTS was a significant vehicle for Cadillac, marking a shift towards a more modern and sporty image. It was available with several engine options, including a 2.6L V6 (210 hp, 194 lb-ft of torque), a 3.6L V6 (255 hp, 252 lb-ft of torque), and a 5.7L LS6 V8 (400 hp, 395 lb-ft of torque) in the CTS-V. Transmission options included a 5-speed manual, a 6-speed manual (CTS-V only), and a 5-speed automatic. Owners generally liked the CTS for its sharp handling, distinctive styling, and powerful engine options (especially the CTS-V). Common dislikes included some interior material quality issues, and some electrical quirks.

Engine

2.6L V6

  • Timing Chain Issues
    • Description/Symptoms: The 2.6L V6 is prone to timing chain stretch or failure. Symptoms include a rattling noise from the engine, especially upon startup, and potential engine misfires triggering the check engine light.
    • Solution: Replacing the timing chain, tensioners, and guides.
    • Estimated Cost to Fix: $800 - $1500+
    • Recalls: None Found

3.6L V6

  • Timing Chain Issues
    • Description/Symptoms: Similar to the 2.6L, the 3.6L V6 can also experience timing chain problems. Symptoms are a rattling noise, misfires, and a check engine light. Error codes P0008, P0016, P0017, P0018 are all related.
    • Solution: Replacing the timing chain, tensioners, and guides.
    • Estimated Cost to Fix: $800 - $1500+
    • Recalls: None Found
  • Oil Consumption
    • Description/Symptoms: Some owners have reported excessive oil consumption with the 3.6L V6.
    • Solution: Possible solutions include replacing valve stem seals, piston rings, or ultimately, engine replacement.
    • Estimated Cost to Fix: $500 - $5000+
    • Recalls: None Found

5.7L LS6 V8 (CTS-V)

  • Crankshaft Pulley Failure
    • Description/Symptoms: The harmonic balancer/crankshaft pulley is known to fail, separating and causing vibrations, noise, and potential damage to the accessory belt drive.
    • Solution: Replacing the harmonic balancer/crankshaft pulley.
    • Estimated Cost to Fix: $300-$600+
    • Recalls: None Found

Transmission

5-Speed Automatic (All except CTS-V)

  • Torque Converter Shudder
    • Description/Symptoms: Shuddering or vibration during gear changes, especially at lower speeds. This can be due to torque converter lock-up issues.
    • Solution: Replacing the torque converter or flushing the transmission fluid and adding a friction modifier.
    • Estimated Cost to Fix: $300 - $1500+
    • Recalls: None Found
  • Harsh Shifting
    • Description/Symptoms: Abrupt or rough shifts between gears.
    • Solution: Transmission fluid change, valve body repair/replacement, or complete transmission rebuild/replacement.
    • Estimated Cost to Fix: $200 - $3000+
    • Recalls: None Found

6-Speed Manual (CTS-V)

No Issues Found

Suspension

  • Rear Differential Bushing Failure
    • Description/Symptoms: Clunking or knocking noises from the rear of the vehicle, especially when accelerating or decelerating. This indicates worn or damaged differential carrier bushings.
    • Solution: Replacing the rear differential bushings.
    • Estimated Cost to Fix: $200 - $500+
    • Recalls: None Found
  • Strut Mount Failure
    • Description/Symptoms: Squeaking, popping or clunking noises when going over bumps or turning. Worn strut mounts can also affect handling.
    • Solution: Replacing the strut mounts.
    • Estimated Cost to Fix: $200 - $500+ per axle
    • Recalls: None Found

Electrical

  • Instrument Panel Issues
    • Description/Symptoms: Gauges may fail to function correctly, flicker, or provide inaccurate readings. This is often due to problems with the instrument cluster itself.
    • Solution: Repairing or replacing the instrument cluster.
    • Estimated Cost to Fix: $200 - $800+
    • Recalls: None Found
  • Door Lock Actuator Failure
    • Description/Symptoms: Door locks may fail to lock or unlock electronically.
    • Solution: Replacing the faulty door lock actuator.
    • Estimated Cost to Fix: $150 - $400+ per door
    • Recalls: None Found
  • Ignition Switch Issues
    • Description/Symptoms: Difficulty starting the vehicle, or the engine stalling unexpectedly.
    • Solution: Replacing the ignition switch.
    • Estimated Cost to Fix: $150-$400+
    • Recalls: None Found

Exterior

  • Headlight Condensation
    • Description/Symptoms: Moisture buildup inside the headlight housings.
    • Solution: Replacing the headlight housings or attempting to seal the existing ones.
    • Estimated Cost to Fix: $200 - $600+ per headlight
    • Recalls: None Found

Interior

  • Sunroof Issues
    • Description/Symptoms: Sunroof may get stuck, make noise, or leak.
    • Solution: Repairing or replacing the sunroof motor, track, or seals.
    • Estimated Cost to Fix: $200 - $1000+
    • Recalls: None Found
  • HVAC Actuator Failure
    • Description/Symptoms: Clicking noises from behind the dashboard, improper temperature control, or air only blowing from certain vents. Often due to failed HVAC actuators.
    • Solution: Replacing the faulty HVAC actuator.
    • Estimated Cost to Fix: $200 - $600+ depending on location of actuator.
    • Recalls: None Found

Summary

The 2004 Cadillac CTS has some known issues to be aware of. The timing chain problems in the V6 engines are a significant concern due to the cost of repair and potential engine damage. Electrical issues, such as instrument panel failures and door lock actuator problems, are also relatively common. While the CTS-V offers a thrilling driving experience, it also has its own set of potential problems. Overall, while some issues are relatively minor and inexpensive to fix, others can be costly. Potential buyers should have a mechanic thoroughly inspect the car, paying close attention to the engine, transmission, and electrical systems.

Cadillac, CTS
Cadillac CTS 2004
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