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

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mattbta

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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

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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! :oops:
 

blueinkd

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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:

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.
 

clandr1

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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.
 

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