How to replace spark plugs and ensure proper installation on 2008 Cadillac DTS?

In order to replace spark plugs, loosen the ignition coil and then leave the engine to cool. Wipe off the recess of the spark plug to prevent contamination. Check on the spark plugs and change them with new ones of the right type. Test the gap using a feeler gauge and fit the plugs making sure that they are completely installed.

OEM 2008 Cadillac DTS Spark Plug

Ignition Spark Plug

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2008 Cadillac DTS Spark Plug Part Number: 12571535
Product Specifications
- Replaces: 12561466
- Item Weight: 0.70 Pounds
- Item Dimensions: 5.2 x 4.0 x 1.4 inches
- Condition: New
- SKU: 12571535
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following 2008 Cadillac DTS Submodels:
- Base, Livery, Luxury, Platinum, Premium | 8 Cyl 4.6 L GAS

2008 Cadillac DTS Spark Plug

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2008 Cadillac DTS Spark Plug Parts and Q&A

Q: How to replace spark plugs and ensure proper installation on 2008 Cadillac DTS?
A: In order to replace spark plugs, loosen the ignition coil and then leave the engine to cool. Wipe off the recess of the spark plug to prevent contamination. Check on the spark plugs and change them with new ones of the right type. Test the gap using a feeler gauge and fit the plugs making sure that they are completely installed.