Hi there.
Does anyone know where all 4 oxygen sensors are located on a 02 Avalanche 1500 Z71. I can see 2 of them. 1 before the Catalytic Converter and one after but I'm told there are 2 more. Are they easily accessible? I'm suddenly getting poor gas mileage and I think they need to be replaced. I have 120k on the vehicle.
Thanks,
Alex
Does anyone know where all 4 oxygen sensors are located on a 02 Avalanche 1500 Z71. I can see 2 of them. 1 before the Catalytic Converter and one after but I'm told there are 2 more. Are they easily accessible? I'm suddenly getting poor gas mileage and I think they need to be replaced. I have 120k on the vehicle.
Thanks,
Alex