What did you do to your NBS GMT800 Tahoe/Yukon Today?

[Walchit]

I checked 4 different cylinders, and besides the times I forgot to put them back on the base circle, I kept coming up with 7.300. Now you have me wishing I would have checked them all. Tedious is an understatement, lol

 

[Walchit]

For the Gen4 engines, all the 5.3s have it. The Gen4 4.8 and 5.3 blocks are all the same. The 4.8 has the AFM towers cast into it, but they're capped off with the valley cover. What makes a 5.3 out of a 4.8 is a different crankshaft (for longer stroke) and different pistons (4.8 has flat tops). So, you could pick up a Gen4 engine off Marketplace for a few hundred bucks, drop it off at the machine shop to be bored and new bearings installed, then put it together with your stroker kit. Have the stock 799/243 heads cleaned and mildly worked or CNC'ed or buy aftermarket heads. Maybe $3,000 and you'll have a 383 that'll out-pull a 376 in the usable range while meeting or exceeding its efficiency, depending on your cam, head and CR choices.

Don't the gen4 5.3s have flat tops with valve reliefs?

 

[iamdub]

I checked 4 different cylinders, and besides the times I forgot to put them back on the base circle, I kept coming up with 7.300. Now you have me wishing I would have checked them all. Tedious is an understatement, lol

Bruh. My ribs were sore for a week after laying over the core support for so long, turning the crank with a break bar, removing and reinstalling rockers, swapping pushrods for length checker multiple times on each rocker and repeating it for all 16...

 

[iamdub]

Don't the gen4 5.3s have flat tops with valve reliefs?

Yeah, on the '09+ engines with VVT. Valid point, though. The stroker kits come with pistons, so all that's replaced anyway. My main point was that, for the same or lesser than the cost of just a used 6.2 alone (if you can find one), you can build a much better engine from an easily-sourced one.

 

[mattbta]

Just pulled the intake manifold and swapped in the OEM camshaft position sensor I've had sitting on my desk for months. I was having random no-starts on the first time with no pattern and knew the chinesium CPS the shop that did my rear main put in was likely the culprit. So far, she fires first time every time. We shall see! (New intake manifold gaskets were installed at same time.

1.5 hours from start to fire. Wonder what shop time is? I was going super slow - even had to come inside to print the torque pattern.

 

[mattbta]

Also need to fix an exhaust leak at the y-pipe meets cat-back flanges. Shop didn't get it right when reinstalling after rear main. Gah.

 

[Walchit]

Bruh. My ribs were sore for a week after laying over the core support for so long, turning the crank with a break bar, removing and reinstalling rockers, swapping pushrods for length checker multiple times on each rocker and repeating it for all 16...

I'm thinking about pulling the radiator and core support to swap these engines. I just don't know if that will be more of a pita than just working around them.

 

[iamdub]

I'm thinking about pulling the radiator and core support to swap these engines. I just don't know if that will be more of a pita than just working around them.

IMO, a far bigger and unnecessary PITA removing the core support. I R&R'ed mine with the fans removed and rad in place. It fit turned sideways with the mounts bolted to it. Barely, but it fit.

When working on the engine in the bay (harness, hoses, accessories, etc.), I had the wheels off so I could lower it to a more comfortable working height. When it was on the wheels, I used a 6"x6"x24" wooden block as a small stool. None of that was as painful as doing the pushrod and rocker work more recently when I had to lay on the core support for extended periods.

 

[latvius]

Trying to replace the clock spring in my 2005 Denali but need help figuring out how to get this connector apart. If anyone knows can you look at the pics in the this thread and tell me?

Clock Spring Replacement Help

I am replacing the clock spring in my 2005 Denali and need help on how to disconnect a connector. In the pictures is the large one with the grey handle, I assume you push the handle back like I have in the 1st picture but then how does it disconnect? YT videos I watched didnt help much.

www.tahoeyukonforum.com

 

[latvius]

Finished installing the new clock spring, ended up having and extra wire, the old one did not have it. Everything seems to be working so I dunno.

 

[Scottydoggs]

Finished installing the new clock spring, ended up having and extra wire, the old one did not have it. Everything seems to be working so I dunno.
View attachment 381338

usually if you got two wires one would get plugged into the wire for the steering wheel radio controls. if you dont have that then theres your extra wire. if they are not working. well thats where it would go maybe.

 

[Jobi-Wan Kenobi]

Working on an everlasting brake/front wheel bearing/CV shaft/front axle leak job. I still need to change fix the headliner, flush the cooling system and change the oil pressure sensor. But I got the rear wheels put back on so it at least looks like I'm getting somewhere.

 

[Walchit]

Just pulled the intake manifold and swapped in the OEM camshaft position sensor I've had sitting on my desk for months. I was having random no-starts on the first time with no pattern and knew the chinesium CPS the shop that did my rear main put in was likely the culprit. So far, she fires first time every time. We shall see! (New intake manifold gaskets were installed at same time.

1.5 hours from start to fire. Wonder what shop time is? I was going super slow - even had to come inside to print the torque pattern.

Bought my genuine gm one off of Amazon, also chinesium. I either got scammed or they are made in China, lol.
I'm less worried now that I pulled my intake yesterday, it really wasn't bad. I'm sure most shops want a weeks wages to do it...

 

[Rocket Man]

Bought my genuine gm one off of Amazon, also chinesium. I either got scammed or they are made in China, lol.
I'm less worried now that I pulled my intake yesterday, it really wasn't bad. I'm sure most shops want a weeks wages to do it...

GM sources parts from all over the world, China included. Anymore it’s not so much where it’s made, it’s what quality control oversight it’s made with and whether the design is a copy or if it’s an original. China’s plants have as good a capability as any other country’s plants.

 

[MassHoe04]

Working on an everlasting brake/front wheel bearing/CV shaft/front axle leak job. I still need to change fix the headliner, flush the cooling system and change the oil pressure sensor. But I got the rear wheels put back on so it at least looks like I'm getting somewhere.

Nice rod! Model A or actual deuce?

 

[mattbta]

Bought my genuine gm one off of Amazon, also chinesium. I either got scammed or they are made in China, lol.
I'm less worried now that I pulled my intake yesterday, it really wasn't bad. I'm sure most shops want a weeks wages to do it...

Yeah, I posted a pic of the one I just put in over in the NNBS thread where you asked about yours. This GM one says china on it as well. The shop put in “csc1064” which looks to be carquest? And now that I just looked at the invoice I’m mad that I paid a huge markup on that part. I had a bad feeling when I picked it up as I’ve read numerous threads here about these rigs not liking anything but OEM.

Live and learn, I guess. At least I got a new fuel pump and FPR in it after I fired the parts cannon. Hahahahaha.

 

[Stocco]

Replaced one TPMS sensor and the rear blend door actuator.

 

[Rocket Man]

Replaced one TPMS sensor and the rear blend door actuator.

Why just one? I do those all 4 at a time. The batteries tend to run down at the same time. Your other 3 will be dying soon.

 

[Stocco]

Why just one? I do those all 4 at a time. The batteries tend to run down at the same time. Your other 3 will be dying soon.

Yeah, I think I'm caught up now doing them one at time. I don't think there are any originals left.

 

[Jobi-Wan Kenobi]

@MassHoe04 its one my dad's toys. I'm not entirely sure on the model other than being called a highboy. Dad has gotten into car shows over the last few years and takes that one fairly often. The camaros are on the other side of the shop. Then he has others at my sisters place.