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Hello everybody on the forum, my name is Kouakou Leonard I am a new member(limb) on the forum. I reside in Bukina faso, in May I am me meme native of the Ivory Coast I ask for your help(assistant). I have Chevrolet Avalanche under the hand, the annee on Driving 2003 V8 gasolines(essences), enfaite I am electricien automobile, here we avont no device of diagnosis for General Motors the probleme is the suvante. Following a journey the car has to run(drive) on a way not butum
 

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Hello Leo and welcome to the site! We are very sorry to hear your Avalanche is not running properly. Can you gave us anymore information or describe how it is running? If it is the 5.3 liter engine, it could be running roughly due to a plugged fuel filter or bad fuel pump. Or, it could be elctrical and running roughly due to a bad coil pack giving ramdom mis-fires. I hope we can help!
 

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Welcome, Leo.
 
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