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Join Date: Apr 2006
Location: Denver, Colorado
Posts: 25,707
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As old and with as miles on it as you must have, replace both front 02's or you will have an imbalanced air/fuel ratio between the 2 banks.
Also, when buying 02's for your truck there are 2 different styles, the standard and the advanced emission style so you will need to buy the correct one based on your vin number.
Also, when buying 02's for your truck there are 2 different styles, the standard and the advanced emission style so you will need to buy the correct one based on your vin number.