Carbon Monoxide in Cab

[mr48chev]

You do need to have the exhaust exit out the sides behind the rear tires on these as others mentioned above. Make sure that the tip of the pipe gets out in the air stream too.

Just as the air flow sucks dirt, muck and road debris onto the tailgate and back window it can suck the exhaust right back up into the rig through leaking or missing gaskets.

The local muffler shops as a group won't install tailpipes going straight out the back of pickups with camper shells or any style of suv. Even if you don't run a shell on a pickup you have to request pipes straight out the back with the understanding you do not intend to run a shell.

[vtblazer]

Originally Posted by mr48chev

You do need to have the exhaust exit out the sides behind the rear tires on these as others mentioned above. Make sure that the tip of the pipe gets out in the air stream too.

This worked pretty well on mine:

[Firebirdjones]

Originally Posted by mr48chev

The local muffler shops as a group won't install tailpipes going straight out the back of pickups with camper shells or any style of suv. Even if you don't run a shell on a pickup you have to request pipes straight out the back with the understanding you do not intend to run a shell.

I've never heard that before. Sounds like the muffler shops are starting to get a bit extreme. I've always had my tailpipes out the sides, but it's never made a difference in getting fumes away from the cab.
I can drive with the back window popped open and the fumes are still overwhelming even with the tailpipes pointed out the side.

I honestly don't think there is much that can be done about it as far as tailpipe routing. There either has to be alot of ventalation or sealed up tighter than a drum.

[bouncytruck]

I've never had a problem with mine. You cannot see the exits looking at the truck from the side. I do have all the seals in place on the tail gate and hatch but I haven't had any issues running the soft top.

[snowblind]

ANY holes/cracks in your floor, doors, etc will let in fumes and having anything open (other than thee kick panel vents) will make it worse. Opening the rear hatch will make it MUCH worse.

I cut out out a bunch of the rear floors in my Jimmy and drove it a few days will plastic sheeting laid down. With all the windows closed the plastic lay flat but as soon as I cracked the window or even the vent window the plastic floated up two feet off the floor. The air outside the truck is rushing by so fast that when you crack a window it sucks the interior air out and replaces it with the turbulent air underneath and behind the vehicle.

[Dusty71blazer]

I have this issue too and I am working to fix it. One other thing to consider- How is it running? If your engine is running rich & making a stronger than normal exhaust smell that will make it even harder to resolve the problem..