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

[Rocket Man]

I was referring to the liner inside the wheel wells.

We call those inner fender liners.

 

[Sam Harris]

Rotated tires and checked front brakes. I knew they were going to be due for a change soon. Yep! Next weekends project. Big Brake Upgrade.

Nice! You going with GMT900 brake calipers, or the 2019+ variety?

 

[mattbta]

Have had PowerStop pads and rotors for the front of my daughter's Camaro sitting in the garage for quite some time. She came over to take mom to brunch and activities. Would have been perfect time to swap, but realized I don't have caliper bracket bolts and the stock ones are TTY. Rather than attempt to locktite and send it, it became future Matt's problem. Guess I'll order some bolts. None of the local parts houses have two pair in stock.

 

[Sam Harris]

Have had PowerStop pads and rotors for the front of my daughter's Camaro sitting in the garage for quite some time. She came over to take mom to brunch and activities. Would have been perfect time to swap, but realized I don't have caliper bracket bolts and the stock ones are TTY. Rather than attempt to locktite and send it, it became future Matt's problem. Guess I'll order some bolts. None of the local parts houses have two pair in stock.

TTY caliper bracket bolts? Never knew that was a thing! Hope none of the ones I’ve done were!

 

[blueinkd]

It’s an RPO code for a heavy duty cooling package. I don’t know if it was on our platform but is for the GMT-900. One component is 700 watt fans versus the standard 500. The first design has 9 & 7 blade fans with a second design having two rimless 5 blades. (The standard are 5 & 7). The higher wattage moves more air. I also don’t know what other components of the RPO code entail. Seems the 34” radiator is mostly the same.

Couple of informative threads in the NNBS:

KL5 700 Watt Fan Conversion - 1 or both?

For those who have upgraded to the 700w radiator fans, where are you buying them? Are you buying both or just the driver side? I have heard that if you run both, the electrical system has a hard time keeping up unless you upgrade that. Does it matter how many blades the fan is? I have a 2013...

www.tahoeyukonforum.com

K5L cooling fans

does anybody know how many more cfm's the HD cooling fans pull over the stock, and is it worth upgrading to them? I tow about 6500 lbs up mountain grades with lots of slowing for turns and want to keep it cool. I'm already contemplating a mishimoto rad, just wondering if theses are worth the...

www.tahoeyukonforum.com

Thanks. My truck has never had temp issues and I was daily driving it for work and idling park for 7-8 hours during peak summer Temps. I did replace water pump, thermostat and radiator with OEM ACD components. I will keep this mod in mind.

 

[05Single]

Fender liner?

Splash guard lol

 

[mattbta]

TTY caliper bracket bolts? Never knew that was a thing! Hope none of the ones I’ve done were!

Me, neither. A guide I found mentioned it then found another post confirming. https://www.camaro5.com/forums/show...d3a8c9660aa1257279e0e3&p=11048824&postcount=5

Weird.

 

[mwilson62000]

Nice! You going with GMT900 brake calipers, or the 2019+ variety?

GMT900. Ordered all ACDelco parts for 2008 Yukon XL from Rockauto today.

 

[Alex_M]

I'll make a post later with some pictures detailing the swap over in the engines section.

EDIT: I have not forgotten, just been busy. Will make the post in the next few days.

I just got this posted up for those who were waiting for some more detail.

 

[clandr1]

I tried my hand at fine tuning the A/C charge now that temps have approached 90 degrees here in Texas. I can't seem to figure out the best way to gauge how much refrigerant I should add (I know, I should be measuring by weight but we're long past that unless I want to evacuate, vaccum, and recharge from scratch which I'd like to avoid). Should the fan be blowing on high, or on low when I'm reading pressures? Should I have a shop fan blowing across the condenser, or spraying with a hose, or leave it completely alone and let the vehicle pull air across it, unassisted?

I can't seem to get it much colder than 50 degrees from the vent with ambient temps around 75 and humidity around 70%. I think the old girl is capable of better cooling, but maybe based on her age it's time for a new condenser since I'm sure after a quarter million miles, the OEM is likely not as efficient as it used to be.