2021 Chevrolet Silverado 1500 Spark plugs
Depends on your version. Choose yours, or compare them here.
- 2.7L L4 (L3B) 0.65–0.75 mm gap
- 4.3L V6 (LV3) and 5.3L V8 (L82) 0.95–1.10 mm gap
0.65–0.75mm
Gap · 2.7L L4 (L3B)
0.95–1.10mm
Gap · 4.3L V6 (LV3) and 5.3L V8 (L82)
2021 Chevrolet Silverado 1500 Owner's Manual, PDF page 438
0.65–0.75 mm (0.026–0.030 in)Open the manual at this page ↗Added Oct 15, 2026 · Updated
See where it's printed
Spark plugs (gap) · 2.7L L4 (L3B) · PDF page 438
0.65–0.75 mm (0.026–0.030 in)
Spark plugs (gap) · 4.3L V6 (LV3) and 5.3L V8 (L82) · PDF page 438
0.95–1.10 mm (0.037–0.043 in)
2021 Chevrolet Silverado 1500 Owner's Manual, PDF page 438
0.65–0.75 mm (0.026–0.030 in)Open the manual at this page ↗Added Oct 15, 2026 · Updated
See where it's printed
Spark plugs (gap) · 2.7L L4 (L3B) · PDF page 438
0.65–0.75 mm (0.026–0.030 in)
2021 Chevrolet Silverado 1500 Owner's Manual, PDF page 438
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) · 4.3L V6 (LV3) and 5.3L V8 (L82) · PDF page 438
0.95–1.10 mm (0.037–0.043 in)
See every quote (2 values)
All versions
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| 2.7L L4 (L3B) | 0.65–0.75 mmgap | “0.65–0.75 mm (0.026–0.030 in)” | PDF page 438 ↗ |
| 4.3L V6 (LV3) and 5.3L V8 (L82) | 0.95–1.10 mmgap | “0.95–1.10 mm (0.037–0.043 in)” | PDF page 438 ↗ |
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