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- The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=37)

- - 90 GMC Suburban question (https://67-72chevytrucks.com/vboard/showthread.php?t=76706)

miket

11-13-2003 08:27 PM

90 GMC Suburban question

Where the heck do I find the Oxygen sensor on a 1990 GMC 1/2 ton 4X4 5.7 litre equipped Suburban?

My father owns it and we can not locate it anywhere....also he has no air pump and noticed it's a heavy 1/2 ton.

72MARIO

11-13-2003 08:39 PM

It is in the exhauts manifold drivers side. Purple wire

miket

11-13-2003 08:42 PM

Thats what we thought....it's not there. Is it possible there isn't one?

72MARIO

11-13-2003 08:51 PM

I guess... That is wierd. It would be in the exhaust system if there is one. Did the stock get swapped out ? Sorry I can't help. Mabye Call GM ?

Later

1976K5CHALET

11-19-2003 02:39 AM

we own a 90 V2500 burb...and its not located in the back of the drivers side manifold...its in the y pipe...near where the two pipes come together....basically under the drivers seat.

DW

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