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1997 Gmc Xc 305

khebert

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khebert Enthusiast

khebert

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i have a 1997 gmc 1500 xc with a 305 180,000 miles and everytime i drive the truck i get the pending codes of po175 and po 172 (bank 1 and bank 2 rich) and after the truck is turned off and restarted these same codes are set and the check engine light is on. i have the cfi and have cleaned the injectors changed the pre-cat o2 sensors, fuel pressure regulator. the truck runs fine even when these codes are set just the mpg goes in the dirt. i am at a loss

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