Chevrolet Suburban 3500 Questions

[strutaeng]

Newer trans doesn’t not have a dipstick. We are both planning to add what GM should have included.

Oh, I didn't know that. So there's like plug down in the bottom of the transmission? Just remove that and install the dipstick tube it sounds like?

Our 20 Express Van 6L90 does have a dipstick. I was kinda shocked the first time I popped the hood and saw the dipstick though.

 

[Thrust]

So looking at the ebay pictures it looks like the y-pipe is nice and round as it goes under the transmission. Can you verify and also what's the diameter?

 

[Doubeleive]

on my 18 when I got it the bypass kits were not so abundent so I tapped it and put a bolt in it (same result)
sort of like this

 

[Bigburb3500]

Oh, I didn't know that. So there's like plug down in the bottom of the transmission? Just remove that and install the dipstick tube it sounds like?

Our 20 Express Van 6L90 does have a dipstick. I was kinda shocked the first time I popped the hood and saw the dipstick though.

I am going to check to see if my truck does but I am 99% confident it does not. I think fleet vehicles did get them in some cases but not all.

 

[Geotrash]

I am going to check to see if my truck does but I am 99% confident it does not. I think fleet vehicles did get them in some cases but not all.

My 'burb 3500 definitely does not.

 

[Geotrash]

on my 18 when I got it the bypass kits were not so abundent so I tapped it and put a bolt in it (same result)
sort of like this

Thanks Wes.

 

[Geotrash]

Oh, I didn't know that. So there's like plug down in the bottom of the transmission? Just remove that and install the dipstick tube it sounds like?

Our 20 Express Van 6L90 does have a dipstick. I was kinda shocked the first time I popped the hood and saw the dipstick though.

The plug is on the passenger side of the transmission, on top of the pan casting in the case. It has a removable plug that is designed to accommodate a seal and the end of the dipstick tube.

 

[Geotrash]

So looking at the ebay pictures it looks like the y-pipe is nice and round as it goes under the transmission. Can you verify and also what's the diameter?

I’ll get you pics and measurements tomorrow.

 

[Geotrash]

So looking at the ebay pictures it looks like the y-pipe is nice and round as it goes under the transmission. Can you verify and also what's the diameter?

I had a minute, so I went out of the garage and laid underneath it for a second and took some measurements and pictures. The pipes coming from the headers into the Y, are 3 inch and round. And the exhaust behind the Y is 4 inch, also round.

 

[Thrust]

Thank you! Looks like it has a transmission drain plug too.