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

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
25,965
Reaction score
50,651
Location
Oregon
Plugs and wires and attempted to quiet the power steering with a turkey baster and bleeding it. Still groans some. #8 plug was a PITA, finally figured out the best way was just to lay on top of the engine, then it was easy. Old plugs didn’t look terrible, maybe somebody did them in the 145k before I had it...

View attachment 259031
Why not do the method where you disconnect the return hose, run it into a bucket and flush it completely? You can replace 100% of the fluid that way.
 

Sam Harris

Supporting Member
Joined
Sep 26, 2018
Posts
7,400
Reaction score
14,796
Location
Texas
I had my pump replaced and the restored pressure helped out my hydroboost brake performance a bit. The braking improvement was noticeable, and no more pump whine.
Excellent info. I hadn’t even considered this.. mine’s been whining just a little ever since I’ve owned it. It’s been on my list, but I think that comment bumped it up a little...
 

Fless

Staff member
Super Moderator
Joined
Apr 2, 2017
Posts
10,462
Reaction score
20,778
Location
Elev 5,280
My mechanic tried some PS magic fluid to see if that would quiet it down, but it didn't do much so I opted for the full pump change. I thought it important with the brakes being integrated, and I was preparing a camping trip and towing a camper a few months later.
 

Forum statistics

Threads
129,203
Posts
1,812,067
Members
92,305
Latest member
DefiantOne
Top