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6.2 L Recall

Tom73
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davester
davester

"they don't have to fix everyone's truck today.  just mine."

newdude
newdude

Oil viscosity is not going to affect the MPG in an extreme like you are suggesting.  Its about 1-2% going from 0w20 to 0w40.  The EPA rating on a 6.2 Silverado is 15mpg city, 20mpg highway and 17mpg c

Black02Silverado
Black02Silverado

Also if you look at the Preferred Cost when you look at the Signature Series 0w-40 it's a lower cost than GM's.     https://www.amsoil.com/p/amsoil-signature-series-0w-40-100-synthetic-motor-oil-

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newdude Senior Enthusiast

newdude

Posted
Posted (edited)
21 hours ago, Tom73 said:

I don’t see where P0016 would be involved. It is just the alignment/timing between the crankshaft and the camshaft. This recall is the crankshaft journals and bearings. 
 

The P0016 code indicates a problem with the correlation between the camshaft and crankshaft positions in your GM vehicle, meaning they are not in sync. Common causes include a damaged timing chain or belt, faulty sensors, or issues with the variable valve timing system.

 

20 hours ago, Tom73 said:

Good reading. But don’t see how the camshaft position can be affected by the crankshaft bearings. Unless the bearings are so bad the crankshaft is moving around in the main journals. 

 

 

Bottom end seizing up = spinning off phase of the camshaft.  VVT could be trying to compensate and it hits or exceeds that +/- 11 degree limit in doing so.

 

"The deviation of the relative camshaft position is greater than −11° in one direction or greater than 11° in the other direction (measured in degrees of the crankshaft)." 

Edited by newdude
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Tom73 Enthusiast

Tom73

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Posted

Extended warranty for those that pass inspection. Per GM Authority:

Vehicles impacted by the recall will be inspected by authorized GM technicians. If either of the manufacturing defects are detected, the engine will be replaced. For vehicles that pass inspection, GM will provide an oil and filter change using 0W-40 Mobil 1 Supercar oil, as well as a new oil fill cap to match the revised spec. Engines that pass inspection will also receive a new special coverage program that extends warranty protection for 10 years or 150,000 miles from the vehicle’s in-service date, whichever comes first.

https://gmauthority.com/blog/2025/05...anty-coverage/

typhoon186 Enthusiast

typhoon186

Posted
Posted

I'm currious what inspections will be conducted to check for the defects?  

 

Oil analysis?

Visual scope?

Audio or vibration monitoring?

 

It will have to be something that does not require the engine to be disassembled.  

Tom73 Enthusiast

Tom73

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  • Author
Posted

Just my speculation but assume that crankshafts are supplied by multiple vendors. Apparently some out of spec crankshafts were in the mix so GM has to figure out which engines they went into. Not sure how they would do this other than to drop the pan and check the numbers on the crankshaft. If it is from the bad batch you then get a new engine. If not part of the bad batch you will get an oil change, new oil cap, and a 10 year 150k mile warranty (from inservice date).  

typhoon186 Enthusiast

typhoon186

Posted
Posted
18 hours ago, Tom73 said:

Just my speculation but assume that crankshafts are supplied by multiple vendors. Apparently some out of spec crankshafts were in the mix so GM has to figure out which engines they went into. Not sure how they would do this other than to drop the pan and check the numbers on the crankshaft. If it is from the bad batch you then get a new engine. If not part of the bad batch you will get an oil change, new oil cap, and a 10 year 150k mile warranty (from inservice date).  

a 10 year 150k mile warranty is not bad for the inconvience.

  • Like 1
KARNUT Senior Enthusiast

KARNUT

Posted
Posted (edited)

Motor oil geek, may help with 6.2 confusion. Also explains why they use start stop and cylinder deactivation. 6.2 fixed? Does it help or add to the confusion? On YouTube.

Edited by KARNUT
Z45 Senior Enthusiast

Z45

Posted
Posted

If you are using dexos licensed oil, how could anything go wrong? 

  • 2 weeks later...
Tom73 Enthusiast

Tom73

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Posted

Anyone heard anything more on how/when this recall to happen? My dealer is still in the dark as to when it starts and what the inspection will consist of. They still waiting further instructions from GM. 
Anyone heard anything more?

newdude Senior Enthusiast

newdude

Posted
Posted
3 hours ago, Tom73 said:

Anyone heard anything more on how/when this recall to happen? My dealer is still in the dark as to when it starts and what the inspection will consist of. They still waiting further instructions from GM. 
Anyone heard anything more?

 

 

Its releasing in phases.  We've done the 4 used in stock, and 2 customer vehicles so far.  

  • Like 1
Tom73 Enthusiast

Tom73

Posted
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Posted
16 hours ago, newdude said:

 

 

Its releasing in phases.  We've done the 4 used in stock, and 2 customer vehicles so far.  

How long does it take to do an inspection?

Byrds8 Enthusiast

Byrds8

Posted
Posted

My dealership called me Friday wanting me to bring mine in. The lady was like this is so important because its a safety recall....lol

I told her Id get back to her since we were building desks for our office at the time. :D 

newdude Senior Enthusiast

newdude

Posted
Posted (edited)
4 hours ago, Tom73 said:

How long does it take to do an inspection?

 

 

Figure an hour.  Pull it in, get it on the lift, install the sensor, get the programs running (which its GM and they've been touch and go with their recent security upgrades) and then run the test.  If the truck is cold there's about 10-15 minutes of oil warmup time before the test will run/allow you to record the sample.  Oil temp has to be 90C or higher.    

Edited by newdude
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SC Dean Enthusiast

SC Dean

Posted
Posted

I got my recall notice from GM Canada a couple of weeks ago. I took it to the dealer and they said there's no need to do anything. I'm under warranty until 100,000 km (50,000 on it now) so just leave it; if the engine fails it will be covered under warranty. He said why change the engine now when you can get it changed at 99,000 if it needs it.

Sounds questionable. I'm going to phone GM Canada and ask them.

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