viven44
Senior Member
These are all the modules I can see. Under engine data there was misfire, fuel trim, EVAP, I/M readiness data streams none of which showed fuel pressure (or engine oil pressure which I was interested to find).
What did you do to your NBS GMT800 Tahoe/Yukon Today?
- Thread starter vwbeaner
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that must be a low end scanner if it cant show you ENGINE data, all you are looking at there is topology
dig a little deeper in "powertrain"
I challenge anyone to find a working fuel pressure PID in a GMT800. 
No FPCM in one of these.
No FPCM in one of these.
do not know if these will work but worth a tryI challenge anyone to find a working fuel pressure PID in a GMT800.
No FPCM in one of these.
- PID 0200: Fuel Pressure (Absolute)
- PID 0201: Fuel Pressure (Gauge)
OBD-II PIDs - Wikipedia
viven44
Senior Member
Yes I was just showing the topology to show what modules exists. There is no FPCM.
If I go into the powertrain module, I can look at livestream data for probably 500+ parameters (all under various sub-categories like fuel trim, evap, misfire, etc)... which I have already done. I just can't see anything on fuel pressure or oil pressure...
It is probably a mid-end scan tool. I have programmed ABS modules, and other similar modules for 2010 vintage vehicles. Programmed keys for vehicles up to 2016 year model (it can probably handle all functions up to 2020 year model). I can tell already it won't recognize our 2024 Suburban, so I was disappointed. Probably need to pay for a software update.
It's not the scan tool. GMT800s don't have an active fuel pressure PID. Gotta measure it at the fuel rail with a gauge.
viven44
Senior Member
Yep! I sort of guessed that as I was tracing the fuel lines later yesterday. Of the little bit I saw (line from tank, to pressure regulator, out from regulator, I was hoping to find a pressure gauge of some kind.... was basically looking for wires to/from..)
viven44
Senior Member
Sent off the Kelsey Hayes ABS module for a rebuild. Has the C0265 (Electronic Brake Control Module (EBCM) Motor Relay Circuit) code that showed up occasionally...I tried cleaning grounds but didn't help.
Last time I tried to do it on a Ford, it was a complete mess as the internal wirebonds had to be reworked.. so I ended up getting a junkyard module and reprogramming it.... The GM ones seem to be a lot easier to fix... just resoldering a few pads... but this time for $100 I'm going to trust someone who has done this hundreds of times take care of it...
Last time I tried to do it on a Ford, it was a complete mess as the internal wirebonds had to be reworked.. so I ended up getting a junkyard module and reprogramming it.... The GM ones seem to be a lot easier to fix... just resoldering a few pads... but this time for $100 I'm going to trust someone who has done this hundreds of times take care of it...
latvius
Full Access Member
Designed, installed and 3d printed a new belt routing decal. A replacement one from GM is $25 USD, that's crazy for a sticker. So I designed my own and made it not in French, not for 4 types of engines, made it the match the size of the spot and added a little bling to it. Plus if I can't see I can still feel the route of the belt.
I need a better camera, the color is red not orange but you get the gist.
I need a better camera, the color is red not orange but you get the gist.
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