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Gmc terrain still stalling


tbnlove1
10-02-2021, 10:36 AM
I have a 2012 GMC Terrain that has 126,000 miles
Recently replaced the cat, manifold, and both upstream and downstream censors due to stalling and performance issues.
Its still wanting to stall while idling and has a slight sputter while driving.
Also replaced the spark plugs as well. What am i missing??

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