2005 Cadillac STS Spark Plugs
2005 Cadillac STS spark plugs for each version, from the owner's manual with page references. Values differ by version; see each version.
Depends on your version. Choose yours, or compare them here.
- 3.6L HFV6 0.044 inches gap
- 4.6L DOHC V8 0.040 inches gap
0.044inches
Gap · 3.6L HFV6
0.040inches
Gap · 4.6L DOHC V8
2005 Cadillac STS Owner's Manual, PDF page 394
0.044 inches (1.1 mm)Open the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Spark plugs (gap) · 3.6L HFV6 · PDF page 394
0.044 inches (1.1 mm)
Spark plugs (gap) · 4.6L DOHC V8 · PDF page 394
0.040 inches (1.0 mm)
2005 Cadillac STS Owner's Manual, PDF page 394
0.044 inches (1.1 mm)Open the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Spark plugs (gap) · 3.6L HFV6 · PDF page 394
0.044 inches (1.1 mm)
2005 Cadillac STS Owner's Manual, PDF page 394
0.040 inches (1.0 mm)Open the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Spark plugs (gap) · 4.6L DOHC V8 · PDF page 394
0.040 inches (1.0 mm)
See every quote (2 values)
All versions
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| 3.6L HFV6 | 0.044 inchesgap | “0.044 inches (1.1 mm)” | PDF page 394 ↗ |
| 4.6L DOHC V8 | 0.040 inchesgap | “0.040 inches (1.0 mm)” | PDF page 394 ↗ |
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