confused about carbs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ratface1 · 03-29-2004, 09:47 PM

Hello all

I need to replace the carb on a 1986 GMC sierra classic. I pulled the existing and according to the rochester page its a carb off a buick, therefore this is not the original carb. The carb is a rochester quadrajet and everything hooks up perfectly but I noticed someone used washers on the two front bolts to take up their slack, about 1/2 inch to long. Are there certain numbers of carbs that are interchangeable, the rochester page is somewhat confusing? Does anyone know the correct number carb for this truck?

03-29-2004, 09:47 PM	#1
ratface1 Registered User Join Date: Feb 2003 Location: chicago Posts: 17	confused about carbs Hello all I need to replace the carb on a 1986 GMC sierra classic. I pulled the existing and according to the rochester page its a carb off a buick, therefore this is not the original carb. The carb is a rochester quadrajet and everything hooks up perfectly but I noticed someone used washers on the two front bolts to take up their slack, about 1/2 inch to long. Are there certain numbers of carbs that are interchangeable, the rochester page is somewhat confusing? Does anyone know the correct number carb for this truck?



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