1999–2007 GMC Sierra 1500 4.8L Spark Plugs
OE-verified plug, cross-brand equivalents, gap, and where to buy for the 1999–2007 GMC Sierra 1500 4.8L.
Verified against a manufacturer OE catalog.
The ACDelco 41-985 is a gasket seat, double platinum electrode spark plug, pre-gapped to 0.060". These specifications are decoded from the ACDelco part number and determine which plugs it safely cross-references to — a valid equivalent must match the thread, reach, seat and heat range.
Spark plugs that fit the 1999–2007 GMC Sierra 1500 4.8L
| Plug | Metal | Gap | Buy |
|---|---|---|---|
| OE ✓ ACDelco 41-985 | Double Platinum | 0.060" | Buy |
Frequently asked questions
What spark plug does a 1999–2007 GMC Sierra 1500 4.8L use?
The OE-verified plug is the ACDelco 41-985 (Double Platinum), gapped at 0.060". Verified against a manufacturer OE catalog.
How many spark plugs does a 1999–2007 GMC Sierra 1500 4.8L need?
Check your owner's manual for the exact count for this engine.
What is the spark plug gap for a 1999–2007 GMC Sierra 1500 4.8L?
0.060" — always confirm against the label or manual before installing.
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