2003–2007 Chevrolet Silverado 5.3L Spark Plugs
Catalog-listed plug, cross-brand equivalents, gap, and where to buy for the 2003–2007 Chevrolet Silverado 5.3L.
Listed in a manufacturer plug catalog — confirm against your owner's manual before buying.
The Denso IT16TT is a 14mm thread, 19mm reach, gasket seat, heat range 16, iridium electrode spark plug, pre-gapped to 0.040". These specifications are decoded from the Denso 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 2003–2007 Chevrolet Silverado 5.3L
| Plug | Metal | Gap | Buy |
|---|---|---|---|
| Denso IT16TT | Iridium | 0.040" | Buy |
Frequently asked questions
What spark plug does a 2003–2007 Chevrolet Silverado 5.3L use?
A manufacturer catalog lists the Denso IT16TT (Iridium), gapped at 0.040". Listed in a manufacturer plug catalog — confirm against your owner's manual before buying.
How many spark plugs does a 2003–2007 Chevrolet Silverado 5.3L need?
Check your owner's manual for the exact count for this engine.
What is the spark plug gap for a 2003–2007 Chevrolet Silverado 5.3L?
0.040" — always confirm against the label or manual before installing.
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