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2005 Cadillac CTS

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2005 CTS.

Body PASSENGER CAR

The 2005 Cadillac CTS is a midsize passenger car built on Cadillac’s then‑new platform and equipped with a power‑train that requires 5.05 qt of 5W‑30 API oil. While the model attracted 284 owner complaints overall, the dominant issue area was the power‑train and the year saw seven recalls, placing it squarely in the middle of the vehicle’s complaint curve that spans from a peak of 321 complaints in the inaugural 2003 model to a low of eight in 2018. This positioning indicates that the 2005 CTS suffered more reliability challenges than later revisions but was already moving away from the early‑model volatility that characterized the first generation. Consequently, researchers view the 2005 year as a transitional point where the CTS began to improve its durability record despite still bearing notable power‑train concerns.

Model year2019 2018 2017 2016 2013 2012 2011 2010 2005

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity5.05 qtOEM · verified

Engine oil type5W-30 APIOEM · verified

Lug nut torque100 ft-lbsOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 101 · 540 CCA battery, OE oil filter 12731172. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 101 · 540 CCAOEM · verified

Tire sizeP225-55R16; P245-45R18OEM · verified

Wheel / rim7;7.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	12731172 alt 12577653
Engine air filter	25798270 alt 25750701
Fuel filter	25763176
Spark plug	19301814 alt 19300872
Battery	88864066
Front wiper blades	12487638 alt 12487636
Serpentine belt	12621991 alt 12578549
Thermostat	12600171 alt 12582472
Cabin air filter	19130403

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length	190.2 in
Overall width	70.5 in
Overall height	56.7 in
Wheelbase	113.8 in
Curb weight	3571 lb
Track (front / rear)	60.2 / 60.2 in
Weight distribution (front / rear)	52/48

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the CTS of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

8.2 sec0–60 mph (tested)quickest 8.20 sec — 2005 2.8 Sedan

Year	Trim / engine	0–60	¼ mile	HP	Drivetrain
2005	2.8 Sedan 2.8L V6	8.20 sec	15.80 sec	210 hp	RWD
2004	3.6 Sedan 3.6L V6	6.40 sec	14.92 sec	255 hp	RWD
2004	3.6 Sedan 3.6L V6	6.60 sec	14.99 sec	255 hp	RWD
2003	3.2 Sedan 3.2L V6	7.10 sec	15.50 sec	220 hp	RWD
2003	3.2 Sedan 3.2L V6	7.20 sec	15.40 sec	220 hp	RWD
2003	3.2 Sedan 3.2L V6	7.30 sec	15.70 sec	220 hp	RWD
2008	3.6 DI Sedan 3.6L V6	5.80 sec	14.60 sec	304 hp	RWD
2008	3.6 DI Sedan 3.6L V6	6.10 sec	14.70 sec	304 hp	RWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 5.05 qt of 5W-30 API engine oil, 75W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 100 ft-lbs, the oil drain plug to 18.0 ft-lbs. The firing order is 1-8-7-2-6-5-4-3. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission Fluid	ATF
Automatic Transmission Fluid Capacity	5
Brake Fluid	DOT 3
Differential Gear Oil	75W-90 · GL-5
Differential Gear Oil Capacity	2.7 qt
Engine Coolant	DEX-COOL OR EQUIVALENT
Engine Oil	5W-30 · API
Engine Oil Capacity	5.05 qt

Engine torques

Intake Manifold to Engine Bolts	17 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	15 ft-lbs
Intake Manifold to Engine Bolts	17 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	18 ft-lbs
Engine Oil Pan Drain Plug	18.0 ft-lbs
Engine Valve Cover Bolts	7.4 ft-lbs
Engine Valve Cover Bolts	9.0 ft-lbs

Chassis torques

Lug Nuts	100 ft-lbs
Rear Wheel Hub	118 ft-lbs

Ignition

Cylinder Firing Order	1-2-3-4-5-6
Cylinder Firing Order	1-8-7-2-6-5-4-3
Spark Plug Manufacturer	AC Delco
Spark Plug Type	AC 41-988
Spark Plug Gap	0.044 in
Spark Plug Torque	15.0 ft-lbs
Spark Plug Manufacturer	AC Delco
Spark Plug Type	AC 41-990

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	1.30 lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	4.75 oz
Standard BCI Group Number	101
Standard BCI Cranking Performance	540 cca
Standard BCI Group Number	101

Service checks

Pressure Test	15, Pressure should not exceed 20 psi.
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	194-225 °F
Pressure Test	15, Pressure should not exceed 20 psi.
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	194-225 °F
Pressure Test	15, Pressure should not exceed 20 psi.
Radiator Cap Pressure Relief	15 psi

Brakes

Torque to Knuckle	88 ft-lbs / 96 ft-lbs
Torque Caliper to Bracket	25 ft-lbs / 44 ft-lbs / 46 ft-lbs
Minimum Pad Thickness	Front: 0.039; Rear: 0.039 in
Rotor Max Parallel Variation	0.001 in
Rotor Runout Limit	0.002 in
Rotor Nominal Thickness From	1.259 in / 1.102 in / 1.267 in / 1.023 in
Rotor Nominal Thickness To	1.259 in / 1.102 in / 1.267 in / 1.023 in
Rotor Minimum Machining	1.22 in / 1.062 in

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages

74 ft. lbs., step 2: 150

74 ft. lbs

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages

37 ft. lbs., step 2: 140

37 ft. lbs

Cylinder Head — tightening sequence 2 stages

1	bolts 1-8	33 ft. lbs
2	turn an additional 120 degrees; Bolts 9 and 10:	120 degrees
1	11 ft. lbs.	11 ft. lbs
2	turn an additional 60 degrees	60 degrees

Cylinder Head — tightening sequence 4 stages

1	M11 bolts	33 ft. lbs
2	M11 bolts	120 degrees
3	M8 bolts	11 ft. lbs
4	M8 bolts	60 degrees

Cylinder Head — tightening sequence 3 stages

1	M11 bolts	22 ft. lbs
2	M11 bolts	90 degrees
3	M11 bolts	70 degrees

Intake Manifold to Engine Bolts — tightening sequence 1 stages

3.7 ft. lbs., step 2: 7.4

3.7 ft. lbs

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

12 ft. lbs., step 2: 18

12 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 25,000 mi	Engine Air Filter Element (replace) · Exhaust System (Complete) (inspect) · Fuel System (inspect)
Every 100,000 mi	Fuel Filter (replace) · Spark Plugs (replace)
At 150,000 mi	Accessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2005 Cadillac CTS sits near the peak of a troubling trend for the first generation, with 284 complaints—second only to the 321 logged for 2003—and 7 recalls, matching the highest count in the model's history. This year also recorded 3 investigations, the most for any model year alongside 2006, and a notable 25 crash complaints, signaling potential safety concerns. While the data does not specify root causes, the top complaint areas of power train and air bags align with the elevated recall activity, suggesting systemic issues that were more prevalent early in the generation. In contrast, complaint volumes and recall counts drop sharply after 2007, indicating that later years benefited from refinements. Given the high complaint and investigation levels, the 2005 CTS represents a riskier purchase within this generation, and buyers should prioritize a thorough inspection of the power train and air bag systems.

Open recalls

NHTSA campaigns

629

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

284

Owner complaints

25 involved a crash · 4 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’03 ’04’05’06 ’07 ’08 ’09 ’11 ’12 ’13 ’14 ’15 ’16 ’17 ’18 ’19

Owner complaints filed with NHTSA, by component

All 284 complaints on record, top 8 components.

Power Train55

Air Bags54

Electrical System20

Service Brakes12

Engine11

Service Brakes, Hydraulic9

Steering7

Engine & Engine Cooling7

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 6 campaigns on record for this vehicle.

14V542000Fuel System, Gasoline:Delivery:Fuel PumpReported 09/09/2014

General Motors LLC (GM) is recalling certain model year 2004-2007 Cadillac CTS-V vehicles manufactured October 6, 2003, to March 15, 2007, and 2006-2007 Cadillac STS-V vehicles manufactured June 23, 2005, to March 15… Remedy: GM will notify owners, and dealers will replace the fuel module and fuel tank jumper harness, free of charge. GM sent out interim notices in late October. The recall began on…

14V394000Electrical System:IgnitionReported 02/07/2014

This defect can affect the safe operation of the airbag system. Until this recall is performed, customers should remove all items from their key rings, leaving only the ignition key. The key fob (if applicable), should… Remedy: GM will notify owners, and dealers will install two key rings and an insert in the key slot or a cover over the key head on all ignition keys, free of charge. The recall began on…

Technical service bulletins NHTSA · verified

Showing 5 of 629 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
PIP5601C	2025-07-18	Unknown Or Other	This PI communicates the requirement to provide a pico file to receive diagnostic…
PIT5074R	2025-05-30	Unknown Or Other	This Preliminary Information communication provides information to the technician about…
PIT5074R	2025-05-30	Unknown Or Other	This Preliminary Information communication provides information to the technician about…
PIT5074R	2025-05-30	Unknown Or Other	This Preliminary Information communication provides information to the technician about…
PIP4964F	2025-05-29	Unknown Or Other	This Preliminary Information communication provides information to the technician about…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420

Catalyst system efficiency below threshold — Bank 1

P0300

Random / multiple cylinder misfire detected

P0171

System too lean — Bank 1

P0455

Evaporative emission system leak detected — large leak

P0128

Coolant thermostat below regulating temperature

P0442

Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN

Decode a VIN to confirm the transmission and build data for a specific CTS. OEM

Build data

Plant, GVWR class, engine and body data for any 17-character VIN.

Recalls

Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 101 battery Vehicles taking 5.05 qt Engine oil filter 12731172 Engine air filter 25798270 Fuel filter 25763176 Spark plug 19301814

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 2005 CTS take?

5.05 qt of 5W-30 API, per the factory manual.

Does the 2005 CTS have open recalls?

NHTSA lists 7 recall campaign(s) for this model year. Check your specific vehicle by VIN.