Help!-Issues after body lift

MZ71 · October 3, 2017

So i just finished my body lift and now my truck is showing "service brake assist" and "service stabilitrak" on every start up. I have went around the wheel wells and frame looking for any wires/plugs that may have been pulled or damaged when lifting the body but cant find anything. Had codes pulled this morning and it is throwing:

"U0101 Lost communication with Transmission Control Module (TCM)"

and

"U0140 Lost communication with Body Control Module DTC"

Anybody know where specifically to look for what could have pulled too tight during body lift and caused this? Truck is a 2014 Silverado crew 4x4 5'8" bed

Thanks in advance!

Paintor · October 3, 2017

Maybe we should unhook the battery during body lift. Clear codes, unhook battery...wait ten minutes...plug battery back in.

Justa thought

MZ71 · October 3, 2017

Battery was unhooked during lift. Cleared codes this morning and they came right back as soon as I started the truck.

I left the battery unhooked over night last night hoping that would help too but no luck

Rolling Thunder · October 3, 2017

Battery was unhooked during lift. Cleared codes this morning and they came right back as soon as I started the truck.

I left the battery unhooked over night last night hoping that would help too but no luck

Have you done body lifts before with no code issues?

MZ71 · October 3, 2017

Have you done body lifts before with no code issues?

Not on a 2014, I've done a 3" body lift on a 1998, and a 1.5" body lift on a 2007 nnbs

Northman · October 3, 2017

Aren't there "tip over" sensors on these that need to be relocated to account for the new angles? Just a guess.

Paintor · October 3, 2017

How do the wires to the computer on the frame next to the motor look (drivers side).....are they tight?

ordered the Zone body lift 2 days ago.....is that the one you used?

MZ71 · October 3, 2017

Wires on the frame look fine. Yes I did the Zone 1.5 inch body lift kit

Paintor · October 4, 2017

This one, same lift....turned out to be a sensor going to the wheel. Guessing one of the front wheels for ABS/Stabletrack/speed sensor (i dang near broke the left front one doing the level kit)

http://www.silveradosierra.com/uncategorized/problems-after-1-5zone-body-lift-t329826.html

Also read this for FYI.....steering wheel position sensor throws these systems outta whack ....

http://www.silveradosierra.com/electrical/service-stabilitrak-and-traction-control-after-lift-t198241.html

And....watch this video....then check those ground wires while you are diagnosing....not related to the body lift.....but needs to be checked:

MZ71 · October 4, 2017

Thanks! I'll have to check them again in the morning. They seemed to have plenty of slack. From what I've been reading it sounds like any time abs is acting up it will throw the service stabilitrak as well

MZ71 · October 4, 2017

Checked the abs wires and they have tons of slack and no sign of stretching or coming unclipped. Rechecked all the ground wires and they are getting good clean contact with frame. Any ideas where to get a wiring diagram of that wiring harness that runs on the drivers side of the frame that shows what color wire goes to what? Should have had plenty of slack but no clue what else to look for.

Thanks again

Paintor · October 4, 2017

Just got my kit today and read the instructions.....sooo you dont touch the steering shaft and jack the body up?

Or did they forget to put it in the instructions?

How does your truck drive with these codes? Ok? No shifting problems?

MZ71 · October 4, 2017

No steering shaft extension needed since it's only a 1.5" kit. Truck drives fine but I am assuming I don't have antilock brakes, haven't had to test it yet...

Jerry's Denali · October 4, 2017

The angle of the steering shaft changes ever so slightly when the body is lifted.

I cannot believe something does not need to be loosened on the steering assembly/mounting to allow this change.

Some very sensitive electronics around the steering shaft that could be tweaked.

MZ71 · October 5, 2017

The more I read it kept sounding like it was ABS related so I started checking everything and low and behold, the ABS 60amp JFuse was blown. Everything back to normal now, but I'm stumped on what caused it to blow. I can not find any stretched or bare wires anywhere. I guess for now I will call it coincidence unless it blows again.