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

[mikez71]

The part numbers for the oil pressure sender show it's a dual-function sender and it has four terminals. TBH, I haven't checked the wiring harness. You're saying the wiring harness does not have provision for the temperature part of the sensor?

I haven't been able to find it.. looked at charm.li for a 2013 tahoe as well..

Wiring diagram shows 3 wires for the oil pressure.. 3 terminals on my pressure sender.. Your's has 4?

 

[Doubeleive]

neither one of these guys are doing it just right but you get the general idea

this 2nd guy uses a metal gear and I think a couple mods but that's doing too much, all you have to do is pop the replacement gear in and send it.

 

[mikez71]

The part numbers for the oil pressure sender show it's a dual-function sender and it has four terminals. TBH, I haven't checked the wiring harness. You're saying the wiring harness does not have provision for the temperature part of the sensor?

Haven't checked my wiring, but doubt it looking at the sensor end which looks like this.

What would cause a fluctuation of the speedometer while driving. It kept bouncing from 20mph to 30, down to 15 up to 50, and I was “hopefully” at 50-55mph the whole time.

Is that a sign of a failing dash? I thought the lights just went out, odd to see the flux like that. Tappy tap method didn’t help, in case anyone is curious. Nor did the hammer fist to the top portion of the dash.

Drives normal? Gotta be the cluster if other gauges were fine? idk...

 

[j91z28d1]

Does hers not have the auto memory option to fold mirrors in after shutting the vehicle off?


Funny thing is, the last time the oil was replaced it was done at a valvoline shop. Doubt they used quality product, but who knows. For all I know they could have, and that’s why it came out looking like chocolate milk and Turkish espresso.

I didn't know that was a thing. but nah, gotta manually hit the button. unless there's a setting I don't know about. either way if the truck isn't on, one will stick and error out. so I'd rather it not do it after shut down

 

[j91z28d1]

The part numbers for the oil pressure sender show it's a dual-function sender and it has four terminals. TBH, I haven't checked the wiring harness. You're saying the wiring harness does not have provision for the temperature part of the sensor?

nah, I'm saying it's a simple 3 wire pressure sensor. there's no 4th pin. and that would be a horrible place to check oil temp, you'd just get block temp there's no flow of oil there most of the time other than what is needed to active afm. it just deadheads up there. the only two places I've seen gm put a oil temp sensor is in the sump. or possibly the c5 zo6 might have used a block above the oil filter in the pan where oil is always flowing by

 

[j91z28d1]

not that I'm promoting using the metal over plastic. since it's so eazy to change gears. even if the new ones break you can just do it agian.

but if you did. this is the motor mod needed. so you don't need to buy new motors.

 

[Grady_Wilson]

edit, no, the entire motor/housing is different left/right, the internal parts electric motor. gear are the same, some of lower gear housing is left/right only
the motor is the same 07-14, however some are mostly metal and some have more plastic parts
left & right are different though.
doesn't matter if it comes off a tahoe or yukon or avalanche, suburban they are all interchangeable, escalade should be the same as well

Thank you, Sir.

 

[Grady_Wilson]

neither one of these guys are doing it just right but you get the general idea

this 2nd guy uses a metal gear and I think a couple mods but that's doing too much, all you have to do is pop the replacement gear in and send it.

I thought Gruven was the GOAT for metal gear parts for the mirrors?

 

[Doubeleive]

I thought Gruven was the GOAT for metal gear parts for the mirrors?

ya but way too much, for $12 I can replace the gear 10x, since i bought this thing i am into these mirrors about $30-35
last time I just yanked a whole motor from the junkyard and I think I have 1 or 2 sets of spares
the passenger side went out on the silverado (motor died) and by dumb luck I had picked up a partially broken mirror for $5 at the flea market, just swapped the motor over
these engineers are just doing little tweaks to keep getting paid you can "almost" use a k2 mirror housing & motor on a gmt900, it just has a little gap, the mechanical operation is identical.
some guy probably got paid 150k and just added a inch here and added a inch there done!

 

[Doubeleive]

and just a heads up, the outer shell or painted cap/cover tends to get brittle over time so it's pretty common for a couple of the small clips to break when doing this so just try to be as careful as possible when taking the cap off, the ones I am referring to are seen below, the guy selling these is asking $300 and one side has broken clips
even as such generally they will go back on "ok" might be a little loose is all

 

[Grady_Wilson]

My goal is to grab some motors from a donor and rebuild them, install them and then rebuild the originals to have as spares on the shelf.

 

[Scrappycrow]

Wiring diagram shows 3 wires for the oil pressure.. 3 terminals on my pressure sender.. Your's has 4?

I have not looked at the one on my Tahoe. One discussion with part numbers showed oval-connector sensors with four pins. FWIW, I am irritated when people make claims and don't link to a discussion where there info came from, but damned if I can't find where that was in any of the multiple threads I read.

nah, I'm saying it's a simple 3 wire pressure sensor. there's no 4th pin. and that would be a horrible place to check oil temp, you'd just get block temp there's no flow of oil there most of the time other than what is needed to active afm. it just deadheads up there. the only two places I've seen gm put a oil temp sensor is in the sump. or possibly the c5 zo6 might have used a block above the oil filter in the pan where oil is always flowing by

OK, I'm going to take all of this as authoritative. To be clear, I understood before all this that such a position would not be a good place to check oil temperature (when I've added oil temperature senders in other vehicles, I've put them in the oil filter housing).

 

[91RS]

ya but way too much, for $12 I can replace the gear 10x, since i bought this thing i am into these mirrors about $30-35
last time I just yanked a whole motor from the junkyard and I think I have 1 or 2 sets of spares
the passenger side went out on the silverado (motor died) and by dumb luck I had picked up a partially broken mirror for $5 at the flea market, just swapped the motor over
these engineers are just doing little tweaks to keep getting paid you can "almost" use a k2 mirror housing & motor on a gmt900, it just has a little gap, the mechanical operation is identical.
some guy probably got paid 150k and just added a inch here and added a inch there done!

The Guven setup is also extremely loud and often doesn't make contact and I have to get out and smack the mirror for it to work again.

 

[Joseph Garcia]

What happened to the younger generation. A kid was just arguing with me about which transfer case my Denali had. I told him only one of them has a transfer case - the AWD, to which he replied:
“And there’s your problem, that’s probably the reason why the transmission doesn’t feel right.”.

I don’t argue with people, especially those who are unwilling to listen or those lacking the ability to learn. I’m pretty sure some of these kids are doomed.

That's been the same with every generation. There are those that have a clue, those that don't have a clue and know it, and those who don't have a clue and never will.

 

[j91z28d1]

The Guven setup is also extremely loud and often doesn't make contact and I have to get out and smack the mirror for it to work again.

sounds like the same thing my Amazon metal gear do. it's like the bcm uses current sense to know when to stop and some times it is a bit to tight and doesn't move the other way till you loosen it a bit.

did you do that part where you sand down the ramps on tust round metal ring?

 

[j91z28d1]

I have not looked at the one on my Tahoe. One discussion with part numbers showed oval-connector sensors with four pins. FWIW, I am irritated when people make claims and don't link to a discussion where there info came from, but damned if I can't find where that was in any of the multiple threads I read.

OK, I'm going to take all of this as authoritative. To be clear, I understood before all this that such a position would not be a good place to check oil temperature (when I've added oil temperature senders in other vehicles, I've put them in the oil filter housing).

here's the diagram for the oil pressure sensor for your 2014.

back is sensor ground. grey is 5v reference from ecm. tan/wht is signal to ecm input.




and there's only 3 pins in the sensor as shown before. but I have some laying around if you want to see.

 

[Dirty looks]

I have not seen a 900 body style all wheel drive with a 14 bolt. The K2’s have the 14 bolt though.

Agreed, 2wd models are where I found it.

 

[91RS]

sounds like the same thing my Amazon metal gear do. it's like the bcm uses current sense to know when to stop and some times it is a bit to tight and doesn't move the other way till you loosen it a bit.

did you do that part where you sand down the ramps on tust round metal ring?

Yeah, I made sure the gear wasn’t touching.

 

[mikez71]

Agreed, 2wd models are where I found it.

I'm only saying there are SOME awd 900 escalades with a 14bolt.

 

[Doubeleive]

The Guven setup is also extremely loud and often doesn't make contact and I have to get out and smack the mirror for it to work again.

the 2nd time I opened one of these up I tried a all metal gear and yes it was noticeably louder and it didn't seem to be within the allowable spec
the noise isn't really a big deal it's not like your driving around with it going all the time, but it would bind up so it got tossed and the plastic gear works fine.