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Where is the 02 sensor on bank 1 on a 1997 GMC 1500 savana conversion van with a 57 liter engine?
Wiki User
∙ 18y ago
Oxygen sensors are in the exhaust manifold, right before the crossover or headpipe, depending on which you have. If it says "bank 1" on the code reader, just replace them both. Since oxygen sensors fail after they've served for a while, if one has gone bad the other will be there soon.
Wiki User
∙ 18y ago
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