The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1991 GMC runs poorly after engine is warm

68haywagon · 12-24-2006, 11:56 PM

On my 93 4.3 the O2 sensor is just before the cat on the passenger side. It was angled up toward the cab at about a 30* angle. I would assume yours should be in the same place if the PO didn't remove it. There should be a wire for it somewhere around that area too.

Mike

Also Welcome to the board!!

12-24-2006, 11:56 PM	#5
68haywagon I'm watching you! Join Date: Feb 2005 Location: Levittown, PA Posts: 1,822	Re: 1991 GMC runs poorly after engine is warm On my 93 4.3 the O2 sensor is just before the cat on the passenger side. It was angled up toward the cab at about a 30* angle. I would assume yours should be in the same place if the PO didn't remove it. There should be a wire for it somewhere around that area too. Mike Also Welcome to the board!! __________________ 2012 Chevrolet Silverado 1500 Z71 4WD 1993 Chevrolet C-1500 W/T - Blue - 4.3L V-6, 4 speed auto - Dad's (RIP) 1992 Chevrolet S10 - LS swap project 1968 Chevrolet C-10 longbed fleetside - sold Last edited by 68haywagon; 12-24-2006 at 11:57 PM.