2020 Cadillac CT6 Spark plugs
Depends on your version. Choose yours, or compare them here.
- 3.6L V6 Engine (LGX) 0.031–0.035 in gap
- 4.2L V8 Engine (LTA) 0.029–0.030 in gap
0.031–0.035in
Gap · 3.6L V6 Engine (LGX)
0.029–0.030in
Gap · 4.2L V8 Engine (LTA)
2020 Cadillac CT6 Owner's Manual, PDF page 375
0.80–0.90 mm (0.031–0.035 in)Open the manual at this page ↗Added Oct 17, 2026 · Updated
See where it's printed
Spark plugs (gap) · 3.6L V6 Engine (LGX) · PDF page 375
0.80–0.90 mm (0.031–0.035 in)
Spark plugs (gap) · 4.2L V8 Engine (LTA) · PDF page 375
0.74–0.75 mm (0.029–0.030 in)
2020 Cadillac CT6 Owner's Manual, PDF page 375
0.80–0.90 mm (0.031–0.035 in)Open the manual at this page ↗Added Oct 17, 2026 · Updated
See where it's printed
Spark plugs (gap) · 3.6L V6 Engine (LGX) · PDF page 375
0.80–0.90 mm (0.031–0.035 in)
2020 Cadillac CT6 Owner's Manual, PDF page 375
0.74–0.75 mm (0.029–0.030 in)Open the manual at this page ↗Added Oct 17, 2026 · Updated
See where it's printed
Spark plugs (gap) · 4.2L V8 Engine (LTA) · PDF page 375
0.74–0.75 mm (0.029–0.030 in)
See every quote (2 values)
All versions
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| 3.6L V6 Engine (LGX) | 0.031–0.035 ingap | “0.80–0.90 mm (0.031–0.035 in)” | PDF page 375 ↗ |
| 4.2L V8 Engine (LTA) | 0.029–0.030 ingap | “0.74–0.75 mm (0.029–0.030 in)” | PDF page 375 ↗ |
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