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

[gooffeyguy]

cleaned the tb and reset the idle after replacing some factory wire loom that was turning to dust, so had the air intake off. funny the only bad loom is what runs across the water pump. I've been half temped to put a little cooler stat in this thing for a while. I know they say it's not needed but being 115deg here and running 87. I feel like a 7-10deg cooler stat might help and definitely not hurt. really wish I had timing vs intake air temp table in hpt. blah.

debating sending off oil and trannys samples, but just 3k on the oil and 10k since the tranny fluid change. feels kinda early to get any good data back for the money.


I think I've finally confirmed no hybrid ecm has the capability of doing the virtual flex fuel and definitely won't get the support to enable a add on sensor. shame but it's not just hptuners and other scanners, that's not defined correctly. in the tech 2 not only is there no alcohol content % under fuel system. there's also no way to reset the virtual math under special stuff. I can't imagine they would leave the reset out if it was active

I was always pretty sure, but now I'm 100% sure. should have been obvious, no yellow cap no E. but there's always been disagreement about it. I'm sure since all the hardware is the same, the pumps lines and injectors can handle the alcohol, but the fuel correction just isn't there. not like anyone runs around wot racing in their hybrid, so it probably wouldn't ever hurt anything, but it's not correct.


Suede applicator pads were delivered. so tonight I'm going to try my hand at uv coating these new headlights. let them dry overnight, get them installed tomorrow so can send these old ones back for the warranty refund. going to be an interesting test.

So your pump and injectors are the same as an E85 capable model? I thought I've seen somewhere that there are different fuel pumps, non E85 and E85

 

[LowCountryTim]

Tried my hand at these.. not paying $120 to replace them.

 

[gooffeyguy]

Tried my hand at these.. not paying $120 to replace them.

View attachment 430400
View attachment 430402

Details? Did you just glue on new rubber?

 

[LowCountryTim]

Details? Did you just glue on new rubber?

Yes, cleaned off the remnants of the old rubber and used medium body superglue to affix new rubber. We shall see if the new rubber lasts in the weather.

 

[mikez71]

Installed convex right mirror glass.

Using 2 plastic prybars to remove old glass just bent both 90 degrees.
Reaching in from outside edge with 2-3 fingertips pulling behind actuator ring worked great.
Old mirror went flying and hit the ground. (Hold mirror with other hand)

New KoolVue mirrors have a thicker/sparser heating element.
They also have a different ring built in so you do not need original actuator rings.

I wish they had convex glass for the driver side too...

 

[j91z28d1]

So your pump and injectors are the same as an E85 capable model? I thought I've seen somewhere that there are different fuel pumps, non E85 and E85

as far as I know it's the same, I don't have the oem part numbers to compare, but aftermarket listing's seem to be the same. most newer car pumps have to handle e10/15 anyways. so I think they are just making them all a little better these days. funny thing hptuners days the fuel pump module is the same as the newer camaros and caddy

the injectors are the same part number from what I see.

 

[j91z28d1]

Tried my hand at these.. not paying $120 to replace them.

View attachment 430400
View attachment 430402

that's kinda amazing

 

[Grady_Wilson]

Installed convex right mirror glass.
View attachment 430411
Using 2 plastic prybars to remove old glass just bent both 90 degrees.
Reaching in from outside edge with 2-3 fingertips pulling behind actuator ring worked great.
Old mirror went flying and hit the ground. (Hold mirror with other hand)

New KoolVue mirrors have a thicker/sparser heating element.
They also have a different ring built in so you do not need original actuator rings.
View attachment 430412
I wish they had convex glass for the driver side too...

Did you swap out your mirror because the old one was bad?
After driving Class A equipment, I do not like convex mirrors at all on any vehicle.
I use my mirrors for backing up, often, so I do like the distorted view a convex mirror gives for that scenario.
Convex are handy for lane changes but I prefer a bubble mirror for that use with a regular, flat view mirror as the main mirror.
Maybe I'm just weird or maybe it's just a truck driving thing because I know lots of people like yourself that love the convex mirrors.

 

[Grady_Wilson]

Just got done changing the oil and installing a Fumoto valve.
Oil changes will be much easier from here on out.

Edit: After looking around more carefully at the heater hoses, it looks like I have a slight leak at the T connectors on the firewall.
Guess I will have to order all of the hoses and the T connectors and get that done.
Would be a good time to install the block heater I ordered awhile back.

 

[mikez71]

Did you swap out your mirror because the old one was bad?

I bought some factory mirrors that came with flat glass. I like to see down side of vehicle (backing up) and blind spot at the same time. Was getting used to it, but still didnt like. I considered tow mirrors also. Also considered a stick on button mirror but figured its small.

 

[dkad260]

2012 Yukon, replaced steering rack bushings, had alot of back and forth play, about 1/4" easy.

Out with the old...

New Dorman 523-267


Just make sure they are straight before pressing, a few hits with a hammer until they are seated keeping both inline with each other.

Also did the ring bushing at end of rack, OE GM 22960484

Edit to add: There should be some play back and forth, but mine was moving very easily with one tire off the ground, now it takes much more force.

 

[gooffeyguy]

2012 Yukon, replaced steering rack bushings, had alot of back and forth play, about 1/4" easy.

Out with the old...

View attachment 430444

New Dorman 523-267


Just make sure they are straight before pressing, a few hits with a hammer until they are seated keeping both inline with each other.
View attachment 430446

Momma?

 

[j91z28d1]

so you guys trucks don't run 210 all the time?


I sware I'm going to try a 180 stat in this thing if I can find a good quality one.

motorad just feels like cheap crap. I built a 170 for the smaller size 2008 and down out of a mahl Nissan 240 stat and and some parts from the oem. but these are bigger and 170 I've seen run as low as 186 on a cold nigh on the interstate, but that's fine for the car. I don't want to go that low in the truck. 195 would seem to be a good temp, I think 180ish stat would get there.


its so annoying gm put the thermostat on the inlet side of engine. ugh. I miss the days of buying a 195 stat and it runs 195 instead of this guessing game.

 

[Doubeleive]

so you guys trucks don't run 210 all the time?


I sware I'm going to try a 180 stat in this thing if I can find a good quality one.

motorad just feels like cheap crap. I built a 170 for the smaller size 2008 and down out of a mahl Nissan 240 stat and and some parts from the oem. but these are bigger and 170 I've seen run as low as 186 on a cold nigh on the interstate, but that's fine for the car. I don't want to go that low in the truck. 195 would seem to be a good temp, I think 180ish stat would get there.


its so annoying gm put the thermostat on the inlet side of engine. ugh. I miss the days of buying a 195 stat and it runs 195 instead of this guessing game.

mine runs about 194 pretty much 24/7 unless I am busting it's ballz up a big mountain in the heat of summer

 

[j91z28d1]

huh.. looking thru logs mine seems to cycle slowly between 208 and 216 once warmed up around town and that's running the ac so fan settings are basically max the whole time. that's with a new gm stat.

187 is factory. I should find a 178-180. see if it drops about 10deg. it's a 100 outside Temps on the dash already here.

 

[Doubeleive]

huh.. looking thru logs mine seems to cycle slowly between 208 and 216 once warmed up around town and that's running the ac so fan settings are basically max the whole time. that's with a new gm stat.

187 is factory. I should find a 178-180. see if it drops about 10deg. it's a 100 outside Temps on the dash already here.

I went thru my photo's and found a few different ones I took over the past few years

 

[Doubeleive]

huh.. looking thru logs mine seems to cycle slowly between 208 and 216 once warmed up around town and that's running the ac so fan settings are basically max the whole time. that's with a new gm stat.

187 is factory. I should find a 178-180. see if it drops about 10deg. it's a 100 outside Temps on the dash already here.

how old is your radiator?, does the temp creep up if you are sitting at a red light?
I have found that this will happen when the radiator get older they just stop working as well as they should.

 

[j91z28d1]

I believe it is the original radiator. it definitely could be, but it feels controlled, like the cycle of a stat.

hard to say stopped at red-lights since it's almost always in auto stop where electric pumps kick in and circulate the water to avoid heat soak.

I could probably test it by forcing it to idle next time I'm out and about long enough for all the Temps to stabilize.

 

[Grady_Wilson]

Ordered new heater to firewall hoses, upper and lower heater hoses and thermostat.
Once they come in I will have to dive into replacing everything but the radiator.

 

[blackelky]

Finally replaced this cheap ass duralast battery that the dealer put in when I bought it a couple of years ago. Hopefully the napa one I put in is better.