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Re: Stumbling
A few things to start with would be replacing the spark plugs and wires, fuel filter , run some injector cleaner through it , have the IAC and the TB cleaned. Any one of those will cause an idle stumble.
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** 2007 Avalanche LT. **
6" Pro Comp lift
305/55/20 BFG A/T KO'S
K&N FIPK GEN II
Flo Pro V force muffler & 4" slash cut stainless tips
Color matched front and rear Bowties
3" polished stainless bull bar and Nerf bars
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