does a 1988 chevrolet silverado 5.7 only have one 02 sensor on the drivers side manifold

Asked by Nov 15, 2016 at 10:39 PM about the 1988 Chevrolet C/K 1500 Silverado LB 4WD

Question type: Maintenance & Repair

I only found the one 02 sensor with a single wire lead on the drivers side
manifold. Is that the only one pickup?

4 Answers


I do believe there is only one on this truck, but look around. I have seen up to as many as 3 or 4 on some vehicles. 1 on each exhaust manifold, 1 before the cat and 1 after. But I'm pretty sure the 88 Silverado has one sensor.

1 of 1 people found this helpful.

It might depend on if it has a dual exhaust or not. A factory dual exhaust would need at least two sensors.

I have a 1989 GMC C1500 and it has the one sensor but I did notice in the back near the firewall, it appears to have another wire for a second sensor but nothing plugged up to it. A standard provision for the factory dual that was mentioned maybe?


There is only 1 sensor on it

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