What did you do to your NNBS GMT900 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.

swathdiver

Full Access Member
Joined
May 18, 2017
Posts
19,148
Reaction score
25,173
Location
Treasure Coast, Florida
evap leaks are generally one of the 2 solenoids, the front solenoid runs about $25-30 online and can be changed in a matter of 2 minutes, the rear one runs about $35-50 and takes a few more minutes but is not difficult, the more pricier part is the canister which runs about $100 but probably doesn't need to be replaced unless your having trouble filling the gas tank.
for the time and prices involved to troubleshoot the leak you can shotgun it and replace all 3 and be done messing with it. just my .02, last time mine popped up it was just the front solenoid $25 and it went away

Andy changed them and the code remains. It's probably around the gas tank, there's a line up there that's over $100 to replace and then again, it could be a five cent connector that is leaking. I used the Tech-2 to determine that my purge and vent were not the cause, have to do it to his next time, didn't know the motor had to be cool to run the test.

Probably going to buy one of those yellow Autel smoke machines, the ones that do not need an external air source but after my wallet recovers from sending the kids to school and buying another truck.
 

the_tool_man

Full Access Member
Joined
Oct 15, 2018
Posts
745
Reaction score
1,691
Location
Upstate South Carolina
Probably going to buy one of those yellow Autel smoke machines, the ones that do not need an external air source but after my wallet recovers from sending the kids to school and buying another truck.

After pricing a "professional" diagnostic smoke generator, I borrowed an inexpensive smoke machine, like the ones used for Halloween, from a friend. Worked great for finding vacuum leaks. They cost ~$30.
 

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
23,668
Reaction score
34,555
Location
Stockton, Ca.
for those that have the rear air shocks, do your shocks still have some air in them after an hour of sitting parked or do they deflate? I thought mine were holding air still even the next day after sitting overnight but now they are not, so I'm not sure anymore, curious if yours still hold some air even hours later, you can just reach under and squeeze the bladder to check.
 

R3cord303

Posse In Effect
Joined
Feb 28, 2019
Posts
1,166
Reaction score
1,421
Location
Oregon Valley
for those that have the rear air shocks, do your shocks still have some air in them after an hour of sitting parked or do they deflate? I thought mine were holding air still even the next day after sitting overnight but now they are not, so I'm not sure anymore, curious if yours still hold some air even hours later, you can just reach under and squeeze the bladder to check.
Is this for the Z55 suspension?
 

Forum statistics

Threads
129,131
Posts
1,810,902
Members
92,218
Latest member
SteveandKish
Top