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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

Spark plug gap

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Old Jun 21, 2013 | 11:16 AM
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Default Spark plug gap
Just got a 05 Tahoe Z71 last week. I want to replace spark plugs. Anyone know what the gap and torque should be? I'll be putting in E3 plugs. Also does the engine have aluminum heads?
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Old Jun 21, 2013 | 11:33 AM
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Welcome to the forum.

I would strongly advise against using anything other than the OEM recommended AC spark plugs. These vehicles do not care much for aftermarket plugs.
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Old Jun 21, 2013 | 3:04 PM
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Yes. They are aluminum. If you have 4X4 then you have an aluminum block as well. They decided iron for 4x2 and aluminum for 4x4
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Old Jun 22, 2013 | 12:26 PM
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gap is .040 and i agree i only use delco
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Old Jun 22, 2013 | 5:49 PM
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Thank to all.
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