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

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05Single

afraid of the dark
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Yes, I'm copying him on this one. I like my tail lights but they are too dim. I need to give more notice to people who are riding my ass.
I like to say sharing the same idea , not copying lol . Can’t wait for install pics
 

Cajun Jamie

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Jan 31, 2019
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SW Louisiana (originally) and DFW area presently
I removed the washer fluid reservoir, discovered what appeared to be electrically taped original pumps front and rear (hence why the fluid leaks out). Replaced both pumps. Drove around thinking how happy I am that 2 months ago I bought this GMT 800 series because I see so many on the road. That, and I really love how they look inside and out compared to the 900 series. #ICallMyTruckBaby
 

SnowDrifter

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Washington. The desert side not the Starbucks side
Got the oil pan off, oil pump replaced, timing cover on. Was planning on getting the pan up tonight so the rtv has a good long time to cure but I'm just not feeling it.

Front crank seal wasn't leaking but it was about to. The thing's all stiff

While the front of the engine was clean, the underside showed some light brown varnish that wipes off with a rag. Going to shorten my OCIs a bit to 2.5 to 3k. Been at 3.5 to 4k. I blame that bit wholly on the short trips I do around town. The freeway trips just don't make up for it

Little failure analasys:
I was experiencing oil Pressure fluctuations when warm, particularly at higher RPMs.

The pickup tube o ring was soft and pliable, no cracks or other concerns.

Oil pump tolerance was. 004" consistently within the gear set

Bypass valve showed some scoring exclusive to one area. My suspicion it it was sticking and causing some erratic behavior. My fingers are too large to fit in the passages and feel for any casting flash, unfortunately
 

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