2015 GMC Sierra Denali Spark plugs
Depends on your version. Choose yours, or compare them here.
- 5.3L V8 (L83) 0.95–1.10 mm (0.037–0.043 in) gap
- 6.0L V8 (L96) 0.95–1.10 mm (0.037–0.043 in) gap
- 6.2L V8 (L86) 0.95–1.10 mm (0.037–0.043 in) gap
0.95–1.10 mm (0.037–0.043 in)
Gap · 5.3L V8 (L83)
0.95–1.10 mm (0.037–0.043 in)
Gap · 6.0L V8 (L96)
0.95–1.10 mm (0.037–0.043 in)
Gap · 6.2L V8 (L86)
2015 GMC Sierra Denali Owner's Manual, PDF page 398
5.3L V8 (L83) C 0.95–1.10 mm (0.037– 0.043 in)Open the manual at this page ↗Added Oct 15, 2026 · Updated
See where it's printed
Spark plugs (gap) · 5.3L V8 (L83) · PDF page 398
5.3L V8 (L83) C 0.95–1.10 mm (0.037– 0.043 in)
Spark plugs (gap) · 6.0L V8 (L96) · PDF page 398
6.0L V8 (L96) G 0.95–1.10 mm (0.037– 0.043 in)
Spark plugs (gap) · 6.2L V8 (L86) · PDF page 398
6.2L V8 (L86) J 0.95–1.10 mm (0.037– 0.043 in)
2015 GMC Sierra Denali Owner's Manual, PDF page 398
5.3L V8 (L83) C 0.95–1.10 mm (0.037– 0.043 in)Open the manual at this page ↗Added Oct 15, 2026 · Updated
See where it's printed
Spark plugs (gap) · 5.3L V8 (L83) · PDF page 398
5.3L V8 (L83) C 0.95–1.10 mm (0.037– 0.043 in)
2015 GMC Sierra Denali Owner's Manual, PDF page 398
6.0L V8 (L96) G 0.95–1.10 mm (0.037– 0.043 in)Open the manual at this page ↗Added Oct 15, 2026 · Updated
See where it's printed
Spark plugs (gap) · 6.0L V8 (L96) · PDF page 398
6.0L V8 (L96) G 0.95–1.10 mm (0.037– 0.043 in)
2015 GMC Sierra Denali Owner's Manual, PDF page 398
6.2L V8 (L86) J 0.95–1.10 mm (0.037– 0.043 in)Open the manual at this page ↗Added Oct 15, 2026 · Updated
See where it's printed
Spark plugs (gap) · 6.2L V8 (L86) · PDF page 398
6.2L V8 (L86) J 0.95–1.10 mm (0.037– 0.043 in)
See every quote (3 values)
All versions
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| 5.3L V8 (L83) | 0.95–1.10 mm (0.037–0.043 in)gap | “5.3L V8 (L83) C 0.95–1.10 mm (0.037– 0.043 in)” | PDF page 398 ↗ |
| 6.0L V8 (L96) | 0.95–1.10 mm (0.037–0.043 in)gap | “6.0L V8 (L96) G 0.95–1.10 mm (0.037– 0.043 in)” | PDF page 398 ↗ |
| 6.2L V8 (L86) | 0.95–1.10 mm (0.037–0.043 in)gap | “6.2L V8 (L86) J 0.95–1.10 mm (0.037– 0.043 in)” | PDF page 398 ↗ |
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