Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 96 (ENGINE CONTROLS - SERVICE & ADJUSTMENT SPECIFICATIONS)IGNITION SYSTEMSPARK PLUGS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Spark Plugs
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Spark Plugs
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
SPARK PLUG TYPE
| Application | Type | Part No. | |
|---|---|---|---|
| 2.0L & 2.5L | Denso | K20PR-U11 Or SK16PR11 | |
| NGK | BKR6E11 Or 1FR5J11 | ||
| 2.2L | |||
| Sonoma & S10 Pickup | AC | 41-948 | |
| VUE | GM | 12569190 | |
| 3.0L | Bosch | FLR-LTE | |
| 3.4L | AC | 41-940 | |
| 4.2L | AC | 41-965 | |
| 4.3L | AC | R41-932 | |
| 4.8L, 5.3L & 6.0L | AC | 25171803 | |
| NGK | 12567759 | ||
| 5.0L | AC | 41-952 | |
| 5.7L | |||
| CNG Engine | AC | 41-932 | |
| Gasoline Engine | AC | 41-952 | |
| 8.1L | Denso | TJ14R-P15 | |
SPARK PLUG SPECIFICATIONS
| Application | Gap - In. (mm) | Torque - Ft. Lbs. (N.m) | |
|---|---|---|---|
| 2.0L & 2.5L | .039-.043 (1.0-1.1) | 18 (25) | |
| 2.2L | |||
| Sonoma & S10 Pickup | .040 (1.02) | 13 (18) | |
| VUE | .045 (1.14) | 15 (20) | |
| 3.0L | .035-.043 (0.9-1.1) | 15 (20) | |
| 4.2L | .050 (1.27) | 13 (18) | |
| 4.3L | .060 (1.52) | 11 (15) | |
| 8.1L | .060 (1.52) | 15 (20) | |
| All Others | Iridium .040 in. (1.04 mm) Platinum .060 in. (1.52 mm) |
11 (15) | |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.