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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

Idle RPM

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Old Jun 22, 2018 | 1:38 PM
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cdntahoe2007
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Default Idle RPM
Just curious what my idle RPM should be? Mine has been around the 500-600 when I'm sitting at red lights. Often feel the engine rumble is this normal for my 2007 Tahoe?
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Old Jun 24, 2018 | 9:38 AM
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From: kevinkpk
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My experience with low idle on a 5.3 is fuel pressure regulator. This things sets on the fuel rail, or close to it with a vacuum hose. It's a diaphram, pull the hose, if you have fuel in it probably the diaphram has a hole causing the low idle.
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