How to replace a spark plug safely and effectively on Cadillac CTS?

Start by switching off the ignition before removing the Ignition Coil while wearing protective glasses while being careful of potential air pressure. The cleaning procedure for Spark Plug recess areas functions to stop foreign matter from reaching the Cylinder Head and preventing engine damage while avoiding thread contamination. Use a thread chaser to remove any present contamination. It is important to cool down the engine through compressed air cleaning after removing debris from Spark Plug cavities since hot engine Spark Plug removal can cause thread seizure that harms the Cylinder Head. Before installation always use spark plugs from the manufacturer specifications because alternative types either too hot or too cold may cause severe engine damage. Check the gap of all new and reconditioned spark plugs using a round feeler gauge because pre-set gaps will alter during handling and the plug gap must equal the manufacturer's specification. The threading process for spark plugs into the Cylinder Head should be smooth with full seat commitment using thread chasers to prevent overheating, exhaust blow-by, or thread damage. Install the Spark Plug first before tightening it to 20 n.m (15 lb in). Then reinstall the Ignition Coil.

OEM Cadillac CTS Spark Plug

Ignition Spark Plug

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10 Spark Plugs found

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Cadillac CTS Spark Plug Part Number: 12681665
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaced by: 12681664
- Replaces: 25162555, 12607234, 25315018, 25162556, 19256067, 89017883
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Cadillac CTS | V | 8 Cyl 5.7 L GAS, 8 Cyl 6.0 L GAS
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Cadillac CTS Spark Plug Part Number: 19300872
$7.57 MSRP: $13.52
You Save: $5.95 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12597464, 92220447
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2009 Cadillac CTS | Base | 6 Cyl 2.8 L GAS, 6 Cyl 3.6 L GAS
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Cadillac CTS Spark Plug Part Number: 12681660
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug, Spark Ignition; Spark Plug,Glow
- Replaces: 12622561
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2015 Cadillac CTS | Base, Luxury, Performance, Premium | 6 Cyl 3.0 L GAS, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Cadillac CTS Spark Plug Part Number: 12646780
$10.35 MSRP: $18.48
You Save: $8.13 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug,Glow
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2019 Cadillac CTS | Luxury, Premium, Premium Luxury | 6 Cyl 3.6 L GAS
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Cadillac CTS Spark Plug Part Number: 12571165
$10.36 MSRP: $18.50
You Save: $8.14 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug,Glow
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2015 Cadillac CTS | V | 8 Cyl 6.2 L GAS
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Cadillac CTS Spark Plug Part Number: 12662396
$9.52 MSRP: $17.00
You Save: $7.48 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug,Glow
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2019 Cadillac CTS | Vsport, Vsport Premium, Vsport Premium Luxury | 6 Cyl 3.6 L GAS
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Cadillac CTS Spark Plug Part Number: 12681659
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12647827, 12626906
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2019 Cadillac CTS | Base, Luxury, Performance, Premium | 4 Cyl 2.0 L GAS
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Cadillac CTS Spark Plug Part Number: 12680076
$9.22 MSRP: $16.46
You Save: $7.24 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly-Gasoline Engine Ignition; Spark Plug,Glow
- Replaces: 12642791
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2015 Cadillac CTS | Vsport, Vsport Premium | 6 Cyl 3.6 L GAS
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Cadillac CTS Spark Plug Part Number: 12642722
$9.28 MSRP: $16.58
You Save: $7.30 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug, Spark Ignition; Spark Plug,Glow
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2019 Cadillac CTS | V | 8 Cyl 6.2 L GAS
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Cadillac CTS Spark Plug Part Number: 19301814
$9.53 MSRP: $17.02
You Save: $7.49 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug Assembly; Spark Plug,Glow
- Replaces: 19256624, 12565996
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2006 Cadillac CTS | Base | 6 Cyl 2.8 L GAS, 6 Cyl 3.6 L GAS

Cadillac CTS Spark Plug

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Another component that is extremely vital in the gasoline engines of CTS cars is the spark plug our main focus for this paper since it is responsible for making a primary spark that sparks the f/u air mixture. This process increases the effectiveness of the combustion cycle and results of the lower of the exhaust emissions and the improves the performance of the engine. Cadillac CTS Spark Plug constitutes of the following parts, the central electrode, side electrode and ceramic insulator which form the spark gap to ignite the fuel. Different spark plugs have been used at different Cadillac CTS versions including spark plugs with multiple grounds and SD configurations. These variations are directed towards enhancing ignition performance and equally increasing the durability of the Spark Plug. Maintenance of the gap sizes and heat range is very important so as to achieve the premier results and avoid the damages.

Cadillac CTS Spark Plug Parts and Q&A

Spark Plug
12681665
Q: How to replace a spark plug safely and effectively on Cadillac CTS?
A:
Start by switching off the ignition before removing the Ignition Coil while wearing protective glasses while being careful of potential air pressure. The cleaning procedure for Spark Plug recess areas functions to stop foreign matter from reaching the Cylinder Head and preventing engine damage while avoiding thread contamination. Use a thread chaser to remove any present contamination. It is important to cool down the engine through compressed air cleaning after removing debris from Spark Plug cavities since hot engine Spark Plug removal can cause thread seizure that harms the Cylinder Head. Before installation always use spark plugs from the manufacturer specifications because alternative types either too hot or too cold may cause severe engine damage. Check the gap of all new and reconditioned spark plugs using a round feeler gauge because pre-set gaps will alter during handling and the plug gap must equal the manufacturer's specification. The threading process for spark plugs into the Cylinder Head should be smooth with full seat commitment using thread chasers to prevent overheating, exhaust blow-by, or thread damage. Install the Spark Plug first before tightening it to 20 n.m (15 lb in). Then reinstall the Ignition Coil.