Jump to content

Money Light on 8-Speed, P0700+P0711

neekhalas
 Share

Recommended Posts

neekhalas Enthusiast

neekhalas

Posted
Posted

Check engine light came on a couple months ago, did some research and came to the conclusion that it might have been the TPMS Sensor.  Ended up changing out the entire throttle body for the JET Throttle Body. Money light turned off, truck was driving great, though the problem was solved.  Couple days ago, light came back on and the same symptoms were going on. Decided to actually scan it this time, which I should have done the first time. Got the codes for P0711 and a P0700. Kind of alarmed when I read the P0711 description since it included the word 'transmission' in it. Apparently this is the code for a faulty Trans Fluid Temp Sensor. Very hard to find any info on this problem in the newer trucks and when I took it to the tranny shop he said this is the first one he's seen have a tranny problem so far. Of course, the dealer was no help.  I went in and told them what code I got, first thing the snake of a salesman did was try to tell me maybe the seatbelt is giving off a code and that if I want them to look at it, it would be $220 from the jump. They also said it's not under warranty since it's electrical. Blood red mad. Anyways, I took it to a local shop and the guy that owns the shop has the same truck, just a 2015, so I feel I'm in good hands.  Called me up today to say he tried to order the part, and GM tech told him it's not just the sensor you can switch out.  You have to replace the whole damn harness. Why is GM like this. Anyways, I'll try to keep this updated just in case someone else comes across this problem.

brian1570 Enthusiast

brian1570

Posted
Posted

From memory p0700 is a communication issue. Could be the cause of the p0711. Wouldn't be surprised if it was in the harness. Could also be the TCM itself. Good luck keep us posted. 

  • 2 weeks later...
Thernlund New Member

Thernlund

Posted
Posted

While the sensor and harness are one part, the issue is actually a short in the harness, which with the sensor is inside the transmission oil pan.  The technician I spoke to knew about it before even looking at the truck.  Known issue I guess. 

 

Sensors fail sometimes.  Meh.  I had mine taken care of under power train warranty.  Took an afternoon. 

 

 

  • 1 month later...
martha3065 Enthusiast

martha3065

Posted
Posted

I had this same issue yesterday. Reset the codes. Happened again today in nearly the same spot on the highway on my way home from work.

2016 Silverado LTZ 5.3 8spd

Denali34 Enthusiast

Denali34

Posted
Posted

I have a harness on order for mine as well. The part is on BO. Mostly on the Camaros. Known issue for a while.


Sent from my iPhone using Tapatalk

tyler.frost92 Enthusiast

tyler.frost92

Posted
Posted

Just had this issue on mine as well started yesterday. Digital trans temp gauge has always shown unrealistic sways in temp. Have an appointment to drop it off on monday

tyler.frost92 Enthusiast

tyler.frost92

Posted
Posted

Dropped my truck off last night, they said as long as the tech does in fact diagnose the issue as the temp sensor/harness that it would be covered under power train warranty. They gave me a 19 (new body) 5.3 with an 8 speed. Assuming all the hard parts in the trans are the same, I think it's safe to say the stock trans tune/calibration is miles better than my 17 6.2 8 speed. Way less clunky and it shifts great/much faster under part and wide open throttle.

 

 

Sent from my iPhone using Tapatalk Pro

 

JoeA New Member

JoeA

Posted
Posted
On 8/14/2019 at 2:39 PM, martha3065 said:

I had this same issue yesterday. Reset the codes. Happened again today in nearly the same spot on the highway on my way home from work.

2016 Silverado LTZ 5.3 8spd

How much was it to be repaired? I have the same truck and the same issue

martha3065 Enthusiast

martha3065

Posted
Posted
How much was it to be repaired? I have the same truck and the same issue
Haven't yet. Still under powertrain so hoping they cover if I can get it to replicate.
  • 2 months later...
b1gted Enthusiast

b1gted

Posted
Posted

Any follow up on this?  My 2016 just started throwing these same codes.  Has done it twice now.   I have headers and a tune on mine,  so I assume I will probably have to pay for this issue out of pocket.   What ever ended up being the price to do this fix and anyone happen to know the part #?  

tyler.frost92 Enthusiast

tyler.frost92

Posted
Posted
12 hours ago, b1gted said:

Any follow up on this?  My 2016 just started throwing these same codes.  Has done it twice now.   I have headers and a tune on mine,  so I assume I will probably have to pay for this issue out of pocket.   What ever ended up being the price to do this fix and anyone happen to know the part #?  

Take it in, see if theyll cover it.

  • 1 month later...
2016DenaliGuy Enthusiast

2016DenaliGuy

Posted
Posted (edited)
On 11/10/2019 at 4:32 PM, b1gted said:

Any follow up on this?  My 2016 just started throwing these same codes.  Has done it twice now.   I have headers and a tune on mine,  so I assume I will probably have to pay for this issue out of pocket.   What ever ended up being the price to do this fix and anyone happen to know the part #?  

Bumping to see if anyone has updates for a part number for this harness.  My truck got the CEL for these codes today also.  It didn't affect drive-ability yet, but when I clicked on the tow/haul mode I noticed the temp gage was reading 0.  So I figured it was just a sensor that has gone bad.  For what it's worth I was driving in heavy rain when it came on.

 

I can see that it is a wire harness that must be replaced.  This shouldn't be that bad of a job.

 

Truck is a 6.2 with 62.5k miles.

Edited by 2016DenaliGuy
  • 4 months later...
  • 2 months later...
Ltz4 me? Enthusiast

Ltz4 me?

Posted
Posted

I just had this code on my 2016 Silverado 8speed ltz(55k miles luckily)

Since check engine light came on it is shifting wonky)

I'll update my original post on here which I started yesterday when it happened when I find out more.

Dealership said it's covered under powertrain warranty ( I guess since it's inside the transmission in fluid)

Thanks Matt ?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Ancillary parts to the lower intake and connections went together without issue.   There was a brief pause when I leak-tested the fuel lines and injection system. Fuel was spraying all over. Lovely. O-rings weren't sealing the fuel lines to the spider, and inbound line was leaking at schrader valve, leaks at both flange nuts. It's moments like those when you just want to set fire to the whole shop, and be done with it. I was mostly enjoying the project up until that point, and was tracking to an agenda of having a running Blazer and a cold beverage in hand by dinnertime.    I found some larger Viton o-rings for my spider and some grease to get them to seat. One leak solved. Swapped fuel line Schrader core for old core. Still leaked. Swapped entire valve for old valve. Leak solved. Nudged the flange nuts a little tighter on the connections. Another leak solved. I could cycle the key / prime the pump and the intake was staying dry.    Reassembled the upper intake, with 10,000 vacuum lines, and filled the cooling system with water* (this is temporary, I'm not done with the cooling system yet).   Showtime!!   Cranked it over and smoke billowed, it was running rough. CEL illuminated and began flashing. P0300 and I somehow tripped a code for the TPS sensor, voltage low.    There's nothing as unrewarding as a vehicle that won't run (and produces the same code/problem) after hours of research and work.   Clearly I was in over my head. Was the timing off, did I stab the distributor incorrectly? Is the new distributor bad? With my limited OBD 1.5 data stream I really don't have a lot of parameters to see. The engine was pulling mad timing again (flooding?).   Think, Atlas, think.   1-6-5-4-3-2. One, six, five.....four, three, ....two. Wait a second. That makes no sense. 1 is the forward cylinder on the driver's side, so 2 should be the forward cylinder on the passenger side, not 6.    I can't believe it, but I'm looking right at it. Swapped 2 and 6 on the distributor and turned the key over, and...   It fired, coughed and stumbled, smoked, and then settled into a smooth idle. The scanner showed no codes, no lights on the dash, and the throttle was nice and responsive to gentle revs while it warmed up.   It's working!!! IT'S WORKING!!!   I paused for a late dinner, no cold beverage yet. I was determined to do my shakedown run. Did a basic safety and fluids check one more time and then went out and put almost 70 miles on it last night. She's a runner, runs good.   Came home and did a post-trip, post-mortem. The underside is dry *except* for where the last owner RTV'd the snow out of the intersection of the timing cover and oil pan. He said he had replaced the timing cover seal, but, my dude had clearly done it incorrectly and then tried to hold back fate with black RTV. Never works.   Yesterday morning I replaced the broken driver's door mirror. As much as I hate cheap Chinese parts, thank goodness for cheap Chinese parts. I think an entire new power mirror assembly cost me like $30, and it works perfectly. Replacement tail lights (faded, and one was busted) ran me about $12/side. I have a door pin kit ready to go in because the driver's door sags just a little and I want to fix that because there's nothing sadder than a saggy door.   I don't know what's next for this rig. Half of me wants to take some nice photos (there's a park nearby with a HUGE American Flag that always seems to be catching wind) and throw it up on CL/Marketplace for a couple grand and see if it flies. The other half of me... I've got a sweet running S10 Blazer that's been keeping my mind off of whatever I'm going through right now, and it's bringing some joy, and is cheaper than therapy. Maybe I'll keep it around for a little while. However, this is my 5th vehicle, just for me. 4 is really my limit, but they are not junk, so need very little attention. I don't know...there's a point where it's just too much and I don't see owning this truck long term. But I solved its major problem, got it running, so I'm going to stick a feather in my cap for now.   Sometimes we just need to get our hands dirty and fix something in the physical world to gain some satisfaction.
    • PureZ71
      PureZ71's 2021 Silverado LT Trail Boss Build

      By PureZ71 · Posted

      Happy 4th of July! Be safe out there tonight     
    • PureZ71
      Show Us Your 2019 & Up T1 Pictures !

      By PureZ71 · Posted

      Happy 4th of July!  
    • Core-Lokt
      Fluid Change Questions

      By Core-Lokt · Posted

      I bought the truck new in December 2022, and it's got 60,000 miles. The front cover magnet had slightly more glitter, but overall very clean, no off odor, and good-colored; really nothing to report. My truck has Hi-Lo transfer case, and the fluid looked great, as well. I have towed..maybe 1,000 miles. Yes, this was the first change for all three driveline items. I'll probably do the transmission at next oil change.
    • Another JR
      Disconnecting Battery

      By Another JR · Posted

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...