GM 6.2 recall

[ORVietVet]

I belong to the Tahoe/Yukon Forum and the busiest and getting bigger every day is the thread about this 6.2 engine recall and effectiing around 600,000 owners.

Kind of makes you real happy you own a GMT800....huh!

But later on, if anyone wants to get a 6.2 cheap and go thru it, there will be plenty of them out there.

 

[Cadillacmak]

Here is an write up on that.

https://www.caranddriver.com/news/a64611938/chevy-silverado-tahoe-cadillac-escalade-defective-v8-recall/

 

[ORVietVet]

Worse than I had heard.

 

[99Sierra2500]

Here is an write up on that.

https://www.caranddriver.com/news/a64611938/chevy-silverado-tahoe-cadillac-escalade-defective-v8-recall/

"The issue stems from internal engine parts (crankshaft and connecting rods) that were damaged during the manufacturing process."

Hmm

As far as talking to techs, the only engine they like is the 6.6 gasoline. I have heard a lot of this is because in the 90's and 00's GM got rid of a lot of its in-house engineering.

 

[ORVietVet]

"The issue stems from internal engine parts (crankshaft and connecting rods) that were damaged during the manufacturing process."

Hmm

As far as talking to techs, the only engine they like is the 6.6 gasoline. I have heard a lot of this is because in the 90's and 00's GM got rid of a lot of its in-house engineering.

This is going to have a large ripple effect in family households. At the T/Y Forum, one member just posted that his wife has a '21 Tahoe with the 6.2 and he has a '21 Silverado with the 6.2. His wife is "not happy" with this at all. "Lose propulsion" while driving? The post did not say whether there were kids involved. Think of all the women that are "seething" over this recall. Especially if the wife wanted a different vehicle and the man talked her in to the 6.2 GM product.

 

[ORVietVet]

"The issue stems from internal engine parts (crankshaft and connecting rods) that were damaged during the manufacturing process."

Hmm

As far as talking to techs, the only engine they like is the 6.6 gasoline. I have heard a lot of this is because in the 90's and 00's GM got rid of a lot of its in-house engineering.

The last year for the 6.6 gas engine was 1980, right?

 

[99Sierra2500]

GM L8T Engine

It's the current engine for the HD models. Wiki says since 2020: https://en.wikipedia.org/wiki/General_Motors_LS-based_small-block_engine#Engine_table

 

[Cadillacmak]

The last year for the 6.6 gas engine was 1980, right?

I had one of those, came apart on a grocery run.

 

[ORVietVet]

I was unaware of the 6.6 gas engine. I thought they were all diesel engines.

This means that if I am to retain this knowledge, something has to go away in my brain capacity locker, skull. I only have room for a certain amount knowledge at 72 years old.

I guess, if I had come across one of these gas engines, I would be aware but I have yet to see one.

I did have a 400 small block in my off road 73 Blazer years ago.

 

[99Sierra2500]

When I was looking at new trucks, that gas 6.6 is what I was looking at.

 

[stutaeng]

The 6.6 GAS L8T engine is supposed to be pretty good from what I've been reading. I think the only drawback (maybe?) is that's direct injected. It comes in the HD trucks, so no AFM/DOD or dynamic fuel management.

I think it has the bore of a 6.2 but longer stroke, and cast iron block instead of aluminum. Couple that with the 10 speed transmission, massive 12" ring gear axle and you've got a good drivetrain.

There's companies now making aftermarket port injection intakes so you can "swap" them into other vehicles.

 

[AuroraGirl]

"The issue stems from internal engine parts (crankshaft and connecting rods) that were damaged during the manufacturing process."

Hmm

As far as talking to techs, the only engine they like is the 6.6 gasoline. I have heard a lot of this is because in the 90's and 00's GM got rid of a lot of its in-house engineering.

GM did a lot of inhouse engineering at GM powertrain, but they were manufacturing the parts with poor QC and the amount of TSBs that pop up for improper assembly or machining for batches spanning MONTHS or YEARS on existing engine families that did not have this issue before is very telling
the 2003-2009 3800 is a great example

They didnt have so many leaky oil seals on the block or heads (valve stems and rear main) in 1995 when the 3800 series 2 came out
but suddenly EVERY gm engine in the 2000s had a TSB addressing valve stem seal leaks starting around 2003 or so (engines at least made by gm, stuff like the vibe/vue have a toyota engine) which is pretty telling
The 2006-2007 3800 is a gamble to put it lightly , either the engiens are great or they have chocolate milk and accelerated wear if they still run, my 2006 la crosse got killed by that


took them 11 years (11!) to fix the Northstar
They did a 1999 running change to improve the head bolt situation which didnt do much and then the compression bumped down in 2000
But 2004 , they fixed it.


Enough time to spoil a complex and great concept for everyone

They had a lot of strange choices in the 90s for engines too , stamped pans were a great example.... 2 layers of steel with composite center. none were flat and true and leaked a lot it seems

 

[99Sierra2500]

GM did a lot of inhouse engineering at GM powertrain, but they were manufacturing the parts with poor QC and the amount of TSBs that pop up for improper assembly or machining for batches spanning MONTHS or YEARS on existing engine families that did not have this issue before is very telling
the 2003-2009 3800 is a great example

They didnt have so many leaky oil seals on the block or heads (valve stems and rear main) in 1995 when the 3800 series 2 came out
but suddenly EVERY gm engine in the 2000s had a TSB addressing valve stem seal leaks starting around 2003 or so (engines at least made by gm, stuff like the vibe/vue have a toyota engine) which is pretty telling
The 2006-2007 3800 is a gamble to put it lightly , either the engiens are great or they have chocolate milk and accelerated wear if they still run, my 2006 la crosse got killed by that


took them 11 years (11!) to fix the Northstar
They did a 1999 running change to improve the head bolt situation which didnt do much and then the compression bumped down in 2000
But 2004 , they fixed it.


Enough time to spoil a complex and great concept for everyone

They had a lot of strange choices in the 90s for engines too , stamped pans were a great example.... 2 layers of steel with composite center. none were flat and true and leaked a lot it seems

Messing up with the 3800 was not good, it was bullet proof before. I noticed that they had moved factories in the 2000's from where the parts were coming from, looking at the boxes. I missed a lot in the 90's because I had an 87 tbi 3/4 chevy, and a 72 3/4 with a 402 big block as a driver too.

 

[AuroraGirl]

Messing up with the 3800 was not good, it was bullet proof before. I noticed that they had moved factories in the 2000's from where the parts were coming from, looking at the boxes. I missed a lot in the 90's because I had an 87 tbi 3/4 chevy, and a 72 3/4 with a 402 big block as a driver too.

despite the machining and qc issues the 3800 just meant that it was 10x more reliable than the 3.5, 3.6 , and 3.9
(3.5 is the displacement of two unrelated but v6 engines from the 2000s, one was 1999-2002 and the other was like 2005-2015 or something)

 

[99Sierra2500]

despite the machining and qc issues the 3800 just meant that it was 10x more reliable than the 3.5, 3.6 , and 3.9
(3.5 is the displacement of two unrelated but v6 engines from the 2000s, one was 1999-2002 and the other was like 2005-2015 or something)

A friend had one in a grand prix that ran forever, I liked that car, though people would put it down.

 

[AuroraGirl]

A friend had one in a grand prix that ran forever, I liked that car, though people would put it down.

 

[99Sierra2500]

View attachment 2996

Nice, what is that in, a gp?

 

[Wademo]

Back to the 6.6 for a second. If you haven't had the chance to experience the power these have, you are missing it!

 

[ORVietVet]

Well @Wademo, first, welcome to your first post on the forum. I hope you stick around and help with info and posts of all kinds and pics.

What years trucks were these 6.6 gas engines in? The only 6.6 I was aware of is the diesel.

Does Wademo, stand for Wade in Mo.? If so, where in Mo.? I am from there.

 

[Griffin]

I have a 2022 and still waiting for the details on when I can bring mine in. Can only imagine the time it is going to take to replace all those! It's not like its just a small rubber clamp or something