Should I set the gap?
No. The engine table says the manufacturer presets the gap, and that re-gapping is not recommended and can damage the spark plug.
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In-depth guide
2020 Chevrolet Silverado 1500
2020 Silverado 1500 spark plug gaps are preset. The 2.7L gap is 0.026 to 0.030 in. The 4.3L, 5.3L, and 6.2L gap is 0.037 to 0.043 in.
Difficulty, time, and cost are estimates when this guide gives them. Torque is a cited figure, or it is left off.
Main source: 2020 Chevrolet Silverado Owner Manual, GMNA-Localizing-U.S./Canada/Mexico-13337620, CTC 1/27/20, engine specifications and replacement parts (opens in a new tab), General Motors, published 2020-01-27, read 2026-10-15.
Numbers on this page come from the cited source. Match the engine before you use a capacity or a torque. Do not work under a vehicle held only by a jack.
The plug listed for that VIN code
The engine table says the gaps are preset. Re-gapping is not recommended and can damage the plug. No firing order is printed.
| Item | Figure | Where it comes from |
|---|---|---|
| 2.7L L4 (L3B) | VIN code K. Gap 0.65-0.75 mm (0.026-0.030 in). GM 12688094, ACDelco 41-106-IP. | Engine specifications and maintenance replacement parts |
| 4.3L V6 (LV3) | VIN code H. Gap 0.95-1.10 mm (0.037-0.043 in). GM 12622441, ACDelco 41-114. | Engine specifications and maintenance replacement parts |
| 5.3L V8 (L82) | VIN code F. Gap 0.95-1.10 mm (0.037-0.043 in). GM 12622441, ACDelco 41-114. | Engine specifications and maintenance replacement parts |
| 5.3L V8 (L84) | VIN code D. Gap 0.95-1.10 mm (0.037-0.043 in). GM 12622441, ACDelco 41-114. | Engine specifications and maintenance replacement parts |
| 6.2L V8 (L87) | VIN code L. Gap 0.95-1.10 mm (0.037-0.043 in). GM 12622441, ACDelco 41-114. | Engine specifications and maintenance replacement parts |
K is the 2.7L L3B, H is the 4.3L LV3, F is the 5.3L L82, D is the 5.3L L84, and L is the 6.2L L87.
The 2.7L gap is 0.65-0.75 mm (0.026-0.030 in). The 4.3L, both 5.3L rows, and the 6.2L gap is 0.95-1.10 mm (0.037-0.043 in). The table says the manufacturer presets the gap.
The 2.7L plug is GM 12688094, ACDelco 41-106-IP. The other 1500 gasoline rows in the parts table use GM 12622441, ACDelco 41-114.
The engine-specifications table also lists a 6.6L V8 (L8T), VIN code 7, with the 0.037-0.043 in gap, and the parts table lists GM 12622441 for a 6.6L V8. The capacity table labels the 6.6L gas engine as 2500 and 3500, so that row is not treated as a 1500 plug. The drive-belt figures on the next page are not redrawn.
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Part
ACDelco spark plug for the gasoline engine
41-106-IP is the 2.7L plug. 41-114 is the 4.3L, 5.3L L82, 5.3L L84, and 6.2L plug.
Spark plug part numbers in the 2020 Silverado owner's manual (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)
Tool
The plug listed for that VIN code
The engine table says the gaps are preset. Re-gapping is not recommended and can damage the plug. No firing order is printed.
Spark plug table in the 2020 Silverado owner's manual (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)
No. The engine table says the manufacturer presets the gap, and that re-gapping is not recommended and can damage the spark plug.
VIN code K, gap 0.65-0.75 mm (0.026-0.030 in), GM 12688094, ACDelco 41-106-IP. The other 1500 gasoline rows in the parts table use GM 12622441, ACDelco 41-114, and the wider gap.
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These guides cover the same kind of work. Their numbers belong to those vehicles, not to this one.