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.
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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 443 (ENGINE CONTROLS AND FUEL - 4.6L - INTRODUCTION)SPECIFICATIONSIGNITION SYSTEM SPECIFICATIONS
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Ignition System Specifications
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Ignition System Specifications
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Ignition Type | Module/Coil Per Cylinder | |
| Firing Order | 1-2-7-3-4-5-6-8 | |
| Primary Coil Current | 10 Amps | |
| Spark Plug Torque | 15N.m | 11 lb ft |
| Spark Plug Gap | 1.27 mm | 0.050 in |
| Spark Plug Type | GM 12571535 | |
| Initial spark plug torque on a new cylinder head is 20 N.m (15 lb ft) | ||
RENDER: 1.0x
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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.