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

[kbuskill]

Installed Moog UCAs and lower ball joints. Truck feels so much tighter in the front. Had no idea how bad the originals had gotten.

I still have a dang squeak somewhere in the front end, I think on the right front. Tightened everything when I did the UCAs and ball joints but its still there. It almost sounds like the squeak you get from worn out brakes or dry brake clips but only when I hit a bump with the right front. Its not constant, just a short chirp. You guys have any ideas?

Strut spring isolators or sway bar end link bushing perhaps.

 

[iamdub]

Installed Moog UCAs and lower ball joints. Truck feels so much tighter in the front. Had no idea how bad the originals had gotten.

I still have a dang squeak somewhere in the front end, I think on the right front. Tightened everything when I did the UCAs and ball joints but its still there. It almost sounds like the squeak you get from worn out brakes or dry brake clips but only when I hit a bump with the right front. Its not constant, just a short chirp. You guys have any ideas?

I second Ken's guesses. You sure it's external? It may not even be a suspension component or coming from where it sounds like. You may have to have someone drive while you stick your head out the window or listen in the floorboard.

Case in point: My S10 had a chirp that only happened on short, sharp bumps. It sounded like it was right behind the dash and I eventually went as far as to drive with the dash out of it. I gave in and brought it to the NVH department at a dealership. They kept it 3 days and gave up. I ended up buying a mechanic's stethoscope and listening around while my GF drove over road reflectors and was able to pinpoint the sound to be coming from the trans tunnel. Crawled under it and started tapping on things and found that a heat shield was lightly rubbing it's edge on the bottom of the cab. I guess the body mounts had settled a fraction of an inch to allow the slight contact. A simple and light push with a prybar fixed it.

 

[Doubeleive]

I second Ken's guesses. You sure it's external? It may not even be a suspension component or coming from where it sounds like. You may have to have someone drive while you stick your head out the window or listen in the floorboard.

Case in point: My S10 had a chirp that only happened on short, sharp bumps. It sounded like it was right behind the dash and I eventually went as far as to drive with the dash out of it. I gave in and brought it to the NVH department at a dealership. They kept it 3 days and gave up. I ended up buying a mechanic's stethoscope and listening around while my GF drove over road reflectors and was able to pinpoint the sound to be coming from the trans tunnel. Crawled under it and started tapping on things and found that a heat shield was lightly rubbing it's edge on the bottom of the cab. I guess the body mounts had settled a fraction of an inch to allow the slight contact. A simple and light push with a prybar fixed it.

that's funny I had a bent heat shield making some noise once too, right on the firewall, took forever to find out what it was even though it was right there in plain sight

 

[iamdub]

that's funny I had a bent heat shield making some noise once too, right on the firewall, took forever to find out what it was even though it was right there in plain sight

At least GM is generally consistent with their engineering mishaps!

 

[NGAneer]

@iamdub @kbuskill

Thanks guys. I'm going to take a look at both of those things and give the keys to my wife for a ride or two. It definitely has more of a thin metal sound so the heatshield idea might be it.

 

[Matt_]

View attachment 192091 Black grills! (bad phone pic in garage) Rattle canned that chrome piece on the front of the hood.

Which grille is that?

 

[08HoeCD]

Enjoyed a roughly 400-mile road trip this past weekend and marveled at how well she's running. 70-75 mph is her sweet spot on the highway, and she can cruise dead straight at that speed all day long, almost completely silent except for a little wind noise. And she looks like a dang dream in the hotel parking lot, too.

Great ride for a 10-year-old, 147k-mile, full size truck.

 

[niely]

400 mile round trip to Detroit auto show averaged overall 15 mpg. Great show! Now just going through Mike's car wash to get this thing clean from driving 400 miles in snow and salt. Underbody wash for sure!

 

[93blkongreenpro]

Received new Moog UCAs, lower ball joints, oil cooler block off gasket. Waiting on new brake hardware, caliper guide pins and R1 Carbon Geomet brake kit.

I will say, if its not MOOG, it's not going on my suspension. MOOG Problem Solver line is some good stuff.

Sent from my SM-N950U using Tapatalk

 

[NGAneer]

I will say, if its not MOOG, it's not going on my suspension. MOOG Problem Solver line is some good stuff.

Sent from my SM-N950U using Tapatalk

Yep, the extra cost was justified.

 

[juan84]

Nothing still sitting in garage waiting for spring lol

Sent from my SM-G920T using Tapatalk

 

[NGAneer]

@iamdub @kbuskill

Thanks guys. I'm going to take a look at both of those things and give the keys to my wife for a ride or two. It definitely has more of a thin metal sound so the heatshield idea might be it.

The squeak lives on.

So here's what I've done...
-tightened rear shock bolts
-tightened front cross member bolts
-torqued the sway bar bushing brackets and end links
-pried the dust shields away from the rotors
-torqued the 36mm CV Shaft nut
-sprayed some white lithium grease on the CV splines (as a test)
-torqued the top and bottom bolts on the struts
-greased the ball joints (which are brand new)
-greased the TREs

Here's what I've checked
-banged on the exhaust with the heel of my hand from the muffler to the cats
-shook the front drive shaft
-tapped the heat shield on the side of the trans
-tapped the heat shield at the spare tire

I was able to replicate it by shaking the truck from the right front. I had to shake it pretty violently to replicate hitting a sharp bump at speed (like a crack in pavement or road reflector). The squeak sounds for sure like it's inboard of the strut and down low. Has me thinking LCA bushings, something in the CV or inner TRE.

I've also thought maybe the bolts on the steering rack are loose, only because I had a leaking PS pump and all that stuff got covered in PS fluid. Maybe allowing bolts to loosen.

We've all done stuff like this. It's going to be something trivial and stupid. When I find it I'm going to feel like a dang idiot for not finding it sooner.

 

[HiHoeSilver]

The squeak lives on.

So here's what I've done...
-tightened rear shock bolts
-tightened front cross member bolts
-torqued the sway bar bushing brackets and end links
-pried the dust shields away from the rotors
-torqued the 36mm CV Shaft nut
-sprayed some white lithium grease on the CV splines (as a test)
-torqued the top and bottom bolts on the struts
-greased the ball joints (which are brand new)
-greased the TREs

Here's what I've checked
-banged on the exhaust with the heel of my hand from the muffler to the cats
-shook the front drive shaft
-tapped the heat shield on the side of the trans
-tapped the heat shield at the spare tire

I was able to replicate it by shaking the truck from the right front. I had to shake it pretty violently to replicate hitting a sharp bump at speed (like a crack in pavement or road reflector). The squeak sounds for sure like it's inboard of the strut and down low. Has me thinking LCA bushings, something in the CV or inner TRE.

I've also thought maybe the bolts on the steering rack are loose, only because I had a leaking PS pump and all that stuff got covered in PS fluid. Maybe allowing bolts to loosen.

We've all done stuff like this. It's going to be something trivial and stupid. When I find it I'm going to feel like a dang idiot for not finding it sooner.

Maybe start spraying some silicone on those spots one at a time a few days apart and see if it goes away.

 

[NGAneer]

Maybe start spraying some silicone on those spots one at a time a few days apart and see if it goes away.

Holy mind meld batman. Just bought a can.

 

[Chuck_Finley]

Put in a replacement rear armrest cap that was missing when I bought my hoe, now there are officially no missing parts!

 

[Doubeleive]

The squeak lives on.

So here's what I've done...
-tightened rear shock bolts
-tightened front cross member bolts
-torqued the sway bar bushing brackets and end links
-pried the dust shields away from the rotors
-torqued the 36mm CV Shaft nut
-sprayed some white lithium grease on the CV splines (as a test)
-torqued the top and bottom bolts on the struts
-greased the ball joints (which are brand new)
-greased the TREs

Here's what I've checked
-banged on the exhaust with the heel of my hand from the muffler to the cats
-shook the front drive shaft
-tapped the heat shield on the side of the trans
-tapped the heat shield at the spare tire

I was able to replicate it by shaking the truck from the right front. I had to shake it pretty violently to replicate hitting a sharp bump at speed (like a crack in pavement or road reflector). The squeak sounds for sure like it's inboard of the strut and down low. Has me thinking LCA bushings, something in the CV or inner TRE.

I've also thought maybe the bolts on the steering rack are loose, only because I had a leaking PS pump and all that stuff got covered in PS fluid. Maybe allowing bolts to loosen.

We've all done stuff like this. It's going to be something trivial and stupid. When I find it I'm going to feel like a dang idiot for not finding it sooner.

try taking off the sway bar rubber "D" bushings and put lithium grease inside them and put back on, they will squeak if not lubed up, spraying from the outside wont get into where it needs to be, same for the rear sway bar.

 

[NGAneer]

try taking off the sway bar rubber "D" bushings and put lithium grease inside them and put back on, they will squeak if not lubed up, spraying from the outside wont get into where it needs to be, same for the rear sway bar.

Yep, you're right. I've already done this though. Put new ones on there about a month ago with lithium grease inside the bushing and on the end link bushings.

 

[NGAneer]

Well, got a can of Liquid Wrench silicone spray and SOAKED the front LCA bushings and rocked the truck before starting on my way home (about 20 miles). Still squeaking.

When I got home, I soaked the rubber exhaust hangers. We'll see in a little bit if that works.

 

[iamdub]

Loose hood hinge or fender bolt(s)? Passenger door do any squeaking when opened?

 

[Doubeleive]

Well, got a can of Liquid Wrench silicone spray and SOAKED the front LCA bushings and rocked the truck before starting on my way home (about 20 miles). Still squeaking.

When I got home, I soaked the rubber exhaust hangers. We'll see in a little bit if that works.

well you could always buy one of those 8 point mic kits and place them all over under the truck and narrow it down that way, I have almost had to do that before.