2003 Cadillac CTS Tune-Up Parts
84 parts verified to fit your 2003 Cadillac CTS for a complete tune-up. This is an easy DIY project — estimated 1-2 hours.
Air Filters
(10)primary
Pronto
Engine Air Filter
$21.01
Bosch
Premium Cabin Air Filter
$22.72
Bosch
Activated Charcoal Cabin Air Filter
$16.73
ATP
ATP Replacement Cabin Air Filter
$15.49
Fel-Pro
Fel-Pro Chevrolet Silverado 1500 Engine Oil Filler Cap Seal
$3.45
WIX
WIX Air Filter Panel
$22.14
K&N
K&N Round Tapered Universal Air Filter 6in Flange ID x 7.5in Base OD x 4.5in Top OD x 6in H
$78.99
ATP
ATP Carbon Activated Premium Cabin Air Filter
$29.91
Fuel Injectors
(20)companion
Standard Motor Products
Fuel Injector - MFI - New
$44.04
Dorman
STEEL FUEL LINE REPAIR KIT. 3/8 IN. x 18 IN. w/16mm FITTING.
$14.04
Bosch
Bosch Fuel Pump Module Assembly
$163.01
Spectra Premium
Fuel Tank Strap
$39.50
Dorman
Steel Fuel Line Repair Kit - 3/8 In. x 12 In. With 16mm Fitting
$18.51
GMB
Fuel Pump Module Assembly
$182.81
Standard Motor Products
Fuel Injector Seal Kit - GDI
$8.00
Fel-Pro
Fel-Pro 15-17 Ford F-150/07-12 Mustang Fuel Injector O-Ring Kit
$3.33
Fluids & Additives
(54)consumable
Royal Purple
Royal Purple Premium Synthetic High Performance Multi-Grade 5W30 Motor Oil - 5 Quart
$127.59
LIQUI MOLY
LIQUI MOLY 250mL Brake Fluid DOT 4
$89.42
LIQUI MOLY
LIQUI MOLY 5L Molygen New Generation Motor Oil SAE 5W30
$210.34
LIQUI MOLY
LIQUI MOLY 400mL LM 50 Litho HT
$78.95
Rostra
Engine Oil Pressure Switch
$7.31
Nissens
Engine Oil Cooler
$142.77
LIQUI MOLY
LIQUI MOLY 1L 2600 Central Hydraulic System Oil
$107.85
Standard Motor Products
OIL PRESSURE LIGHT SWITCH
$7.58
Tune-Up for Other Cadillac CTS Years
Other Jobs for Your 2003 Cadillac CTS
Frequently Asked Questions
What parts do I need for a tune-up on my 2003 Cadillac CTS?
A complete tune-up on the 2003 Cadillac CTS typically requires air filters, fuel injectors, fluids & additives. All parts shown on this page are verified to fit your specific vehicle.
How long does a tune-up take on a 2003 Cadillac CTS?
A tune-up typically takes 1-2 hours and is rated as easy difficulty. Actual time may vary depending on your experience and the specific parts being replaced.
Can I do a tune-up myself?
Yes! A tune-up is an easy DIY project that most people can do with basic hand tools. It's a great way to save money on labor costs.
Are these parts guaranteed to fit my 2003 Cadillac CTS?
Yes, all parts on this page are verified to fit the 2003 Cadillac CTS using VCDB fitment data from manufacturers. Our fitment information is cross-referenced with industry-standard vehicle databases to ensure accuracy.
What brands make tune-up parts for the 2003 Cadillac CTS?
We carry tune-up parts from trusted brands including Pronto, Bosch, ATP, Fel-Pro, and WIX. Filter by brand to find your preferred manufacturer.
How much does a tune-up cost for a 2003 Cadillac CTS?
The cost of a tune-up for the 2003 Cadillac CTS depends on the parts and brands you choose. Browse the parts on this page to see current pricing. Doing the work yourself saves significantly on labor costs.