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

[PG01]

This hit me again last night. Had to limp home. Had to hoof it to work this morning. Gonna borrow the F-150 work truck for the weekend while I try to attack this. Plan is to replace the pedal sensor assembly and go from there.

Gotta be one of them Bluetooth wires in there…corroded under the insulation barely touching hit a bump and s h i t gets wacky Bluetooth wire. Sorry brudda

 

[Charlie207]

Last Thursday, the kiddo and I went to hang with the Texas fam at a beach house VRBO in Galveston. Terramar Beach, to be specific. Spent Friday and Saturday on the beach and drove home Sunday.

View attachment 402401


That bird's lookin back like "to shit or not to shit?"

View attachment 402402



Last night, I took McKinley to a concert in New Orleans. This is the second year in a row that she's requested to see live music for her bday present. I couldn't say 'no' to that! Her bday is over a month from now, but she wanted to see Pixies. Franz Ferdinand and Bully opened for them. I've never heard of Bully and had forgotten how cool Franz Ferdinand is. They had great energy and put on a good show. Oh- what I did to my GMT900... I parked it as safe as possible in a paid parking garage:

View attachment 402403

Used to live on Galveston. The beaches on the eastern side of the island get crowded, but if you go all the way to the west they are empty most of the year, and you can just drive out to wherever your heart desires.

 

[the_tool_man]

I got to practice my tire changing drill this morning on the way to work. It's a good reminder to cycle the winch occasionally to keep it from seizing, and to check the spare tire pressure. Thankful for TPMS so I could pull over before the tire was damaged.

This was a head scratcher. It leaked down from 22psi to 15psi in about a mile. I swapped to the spare, and the pressure held at 15psi overnight. No visual punctures. Nothing shown by the soapy water test...

...until I wiggled the valve stem. Then I found the intermittent leak between the valve body and the rubber stem. Pre TPMS I learned the hard way to always use metal stems. I got complacent.

When in doubt, always wiggle your stem.

 

[j91z28d1]

cut the filter open and let the media drain on pig mat over night... looks nice and clean.

looks like it's doing good.

 

[iamdub]

Used to live on Galveston. The beaches on the eastern side of the island get crowded, but if you go all the way to the west they are empty most of the year, and you can just drive out to wherever your heart desires.

I noticed that. We were probably halfway down the island. The area of beach we were at was supposed to be for those that live/are vacationing at the Terramar Beach houses. It was sectioned off with pylons and those on either side had no vehicles on the beach. I think being able to drive out to the water will be a factor in my future beach vacations cuz it makes things SO much easier. I'd like to venture far west next time. The cruise would be nice.

 

[89Suburban]

Gotta be one of them Bluetooth wires in there…corroded under the insulation barely touching hit a bump and s h i t gets wacky Bluetooth wire. Sorry brudda

I disconnected the battery, replaced the pedal assembly. Hooked battery back up. I guess disconnecting the battery clears the codes because I could not read any. Did a lap around town. Made it back no issues. I got the work truck for the weekend just in case this ***** on me again. Heading out soon for another test run.

Long ass day. Up at 5 for work until 12. Run around to 2 stores to get the pedal assembly because the first one said they had it on the computer but not on the shelf physically. Grab lunch, go home and eat and take a power nap. Get up and mow and weed whack and blow for about 1 1/2 hours. Then dig into this pig. TIRED!!!!!

 

[89Suburban]

And hot and humid and fkn Canada smoke GRRRR!!!!

 

[Doubeleive]

And hot and humid and fkn Canada smoke GRRRR!!!!

108 Here today

 

[Doubeleive]

went and picked up the yukon from the dealer after having the rear u joints and fuel pump done and mf'r is vibrating like a sob.
called them and they said they do not balance the shafts and would have to send it out, so 1st thing Monday i'm going to run it down to the driveline shop
and tell them I need a rush on it already paid for a bunch of stuff for the vacay no time to screw around.
apparently they do not have a QC guy on Saturdays and it was closing time so limped it home even though I didn't want to vibrations f-up the ring & pinion .

 

[Doubeleive]

@swathdiver do you have the torque spec's for the rear u-joint bolts so when I slap this thing back together I can do it right

 

[gooffeyguy]

went and picked up the yukon from the dealer after having the rear u joints and fuel pump done and mf'r is vibrating like a sob.
called them and they said they do not balance the shafts and would have to send it out, so 1st thing Monday i'm going to run it down to the driveline shop
and tell them I need a rush on it already paid for a bunch of stuff for the vacay no time to screw around.
apparently they do not have a QC guy on Saturdays and it was closing time so limped it home even though I didn't want to vibrations f-up the ring & pinion .

Try clocking the driveshaft 180*

 

[Doubeleive]

Try clocking the driveshaft 180*

i'm going to mark it when i take it off but still going to have it balanced, I don't think flipping it alone will do anything but I guess I could try it in the morning it's scorching hot here today not even going outside unless I have to

 

[gooffeyguy]

Not sure on our vehicles, but others I've had, there would be match marks on the drive shaft and on the pinion housing or flange and usually when removing the driveshaft you would re-install matching up the marks.

 

[Doubeleive]

Not sure on our vehicles, but others I've had, there would be match marks on the drive shaft and on the pinion housing or flange and usually when removing the driveshaft you would re-install matching up the marks.

I took the drive shaft on the wifes 05 to be done at the driveline shop I didn't notice any factory marks but there could be

 

[swathdiver]

@swathdiver do you have the torque spec's for the rear u-joint bolts so when I slap this thing back together I can do it right

18 ft lbs. While I've never done it previously, the manual says to use new retainers and bolts. 89029380.

 

[swathdiver]

I took the drive shaft on the wifes 05 to be done at the driveline shop I didn't notice any factory marks but there could be

Tom is mentioning that it's best to install it the same position that it came out to minimize the chance of vibration. So we put scribe or chalk marks on each end and match them up when re-installing.

 

[Doubeleive]

Tom is mentioning that it's best to install it the same position that it came out to minimize the chance of vibration. So we put scribe or chalk marks on each end and match them up when re-installing.

makes sense but had the dealer do it so no telling I will try and flip it in the morning while it is cool out, 108 deg right now or more

 

[j91z28d1]

definitely flip it 180 and make sure the cups are seated correctly in the pinion flange. tighten even.. I'm sure the dealer did non of that.

try not to drive your trip with it vibrating. I've killed tranny tail housing bushings and it messes up the crush bushing and the whole thing loosens, wears badly and eventually takes out the pinion seal.

I hate drive shafts

 

[j91z28d1]

I use the data from the Torque Pro app on my phone or the Tech-2 for the fuel pressure. I have had my Tech-2 connected to two GMT900 hybrids and they also ran at 43.5 psi like mine.

Haven't changed a u-joint in decades as we'd been driving FWD minivans until I bought the truck. Never had a problem back then.

A common problem is that folks will buy a Spicer 1350 and jam the retainers into place which causes binding issues. We run AAM 1355 joints which Spicer also carries but too many get the wrong parts and have issues.

I'll try to remember to photograph or video us changing them and what to look out for when we do it.

I did have a working pid in tq for fuel pressure. of course it's wacky hybrid stuff haha. before it cranks the engine it's 60psi, the longer it stays in auto stop creeps up to 63-65. once it starts it drops down to 43, fluctuates a bit down to 41.9 sometimes randomly, doesn't seem like throttle effects it.. long time off throttle decel it creeps back up towards 50 haha.


so yeah, without seeing the target psi, which maybe the tech 2 has. I have no idea if any of that is right.

I think I'll put a pump on the list to change over the next few months. can't hurt. I didn't think about it, but with a constant 60psi off and stopping starting a 100 times a day, leaking injectors would reek havoc in this thing haha. probably wash rings out.

 

[Doubeleive]

definitely flip it 180 and make sure the cups are seated correctly in the pinion flange. tighten even.. I'm sure the dealer did non of that.

try not to drive your trip with it vibrating. I've killed tranny tail housing bushings and it messes up the crush bushing and the whole thing loosens, wears badly and eventually takes out the pinion seal.

I hate drive shafts

no if it can't be address before I absolutely have to leave then w'ell just take the Silverado, or I will grab a rental
I didn't even want to drive it home