Spark Plugs
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Yukon, 2003 GMC Sierra, 2003 GMC Savana, 2003 Chevrolet Tahoe, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
SPARK PLUG TYPE
| Application | Type | Part No. |
|---|---|---|
| All Models | AC | 25171803 |
| NGK | 12567759 | |
SPARK PLUG SPECIFICATIONS
| Application | Gap - In. (mm) | Torque - Ft. Lbs. (N.m) |
|---|---|---|
| All Models | Iridium .040 in. (1.04 mm) Platinum .060 in. (1.52 mm) |
Tighten to 15 ft. lbs. (20 N.m) when using NEW cylinder head. Tighten to 11 ft. lbs. (15 N.m) for all subsequent installations. |