What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[George B]

A much needed bath.

 

[Bill 1960]

Been doing some exploration in the Bighorn mountains.

 

[Just Fishing]

So! If anyone is in need of O2 sensors buy them now. I’m not sure why they are on sale all of a sudden, but Amazon and a couple other stores have them (213-3866 - upstream) listed for $38/ea whereas all of the auto parts stores have them for $80ish/ea. The (213-4229 - downstream) are $49/ea on Amazon and $60’s at the parts store. If RA and Summit didn’t charge so much for shipping I would use them more. They both have pretty quick turn around times.

Tempting...
I assume mine are original.

I did all of the other sensors with the new engine, i probably might as well.

It would also give me an excuse to get under there to install that wide band...

Hmmm

Eta: ordered!

 

[Just Fishing]

And i pulled the driver side valve cover.
Everything looks great!

I re torqued the rockers for good measure, and proceeded to clearance the valve cover a little more.
I'm likely going to replace it with the updated one later anyways, so i decided to let it open up the bolt holes.

Found that only the middle bolt is used for the coil pack.
But i found the box of original parts that still have from the 5.3 had some bolts that were a perfect fit!

The original oil pump cover bolts were the right threads and length to plug the holes.

It also reminded me to save all of the old bolt hardware.

Something i learned from my grandpa.
A bit Packrat yes, super fkn handy though.

 

[Rocket Man]

Been doing some exploration in the Bighorn mountains.
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Looks beautiful.

 

[Fless]

Been doing some exploration in the Bighorn mountains.
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Northern Wyoming?

 

[Bill 1960]

Northern Wyoming?

Yeah, we’re staying near Sheridan.

 

[iamdub]

Yeah the virtual sensor is a dumb friggin design. I'm sure to get it working would require changing the fuel pump or sending unit.

It was working back in the spring, but is now stuck. Apparently there is no way to adjust it via HP Tuners; per my tuner

Ours being "stuck" at around the same percentage piqued my interest. I'll switch to a physical sensor sometime. There are kits that put one by the fuel rail, but I saw one installed inline near the tank that connected to an unused plug in the harness. I'm just a little skittish of cutting and splicing into the fuel line. Although, I think I'd rather add junctions to the fuel system under the car than on top of the engine.

I should also add that the O2 sensors play a role in it calculating the alcohol content. I might have a lazy O2 sensor. Both were new when I did my motor work last year, but I've gotten the "insufficient switching" code twice. I swapped the sensors around almost two weeks ago and am waiting to see if the problem follows. Maybe the system defaults to ~22% when it has a slowly switching O2 sensor? Back at that time, I tested my fuel and found the alcohol content was actually in the 60s.

 

[iamdub]

Once mine are a bit older I will add them to my AMEX accounts to help establish/build their credit. You can add kids to them at 13 years old, doesn't mean they have to actually hold the card either.

I'll add them and use those cards a couple times amonth to build history

Never knew this. I would be one to get her a credit card at 13! lol

 

[iamdub]

I've been using rotella t6 since I bought it. With Lucas, because racecar or I mean, old beater.
K&n filters or just the blue Delco filters.
Warm idle sits around 30, and warm 6,000 is around 55psi(on the gauge)... I need to get a tech2, nothing else I have seems to be able to read actual oil pressure.

Longer filter sounds good

The Tech2 will read off the oil pressure sensor just like anything else. The only way to know actual pressure and to rule out an inaccurate sensor is to hook up a known accurate mechanical sensor and gauge.