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Truck cuts out after replacing the spark plugs and oil?
RIVERNATIVE15
MEMBER
2004 GMC SIERRA
6.0L
V8
4WD
AUTOMATIC
317,217 MILES
I replaced the spark plugs and oil. Now it has a low idle and cut out when put into gear and press on the gas pedal.
Saturday, October 8th, 2022 AT 8:08 PM
1 Reply
JACOBANDNICKOLAS
MECHANIC
109,700 POSTS
Check to make sure by accident you didn't disconnect any engine vacuum hoses.
Here is a link that explains how to locate them:
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
How low is the idle speed? Also, is the check engine light staying on when the engine is running? Do you feel any misfire (rough idle) when it is running?
Let me know.
Joe
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Sunday, October 9th, 2022 AT 5:25 PM
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