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Drivetrain - 2011+ Discuss front and rear axle, transfer case, brakes, etc. Transmission questions belong in the appropriate transmission forum below. Fifth generation and above...

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Old 01-11-2019, 04:02 PM   #1 (permalink)
MaxACL
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Trailer Brake Codes settings

I deliver new RV trailers and the last ten or twelve trailers have set off the noise maker on the dash saying that I need to check trailer brakes, then service trailer brakes and the dealer can't replicate it. The truck was checked yesterday and still can't find anything wrong. I'll see if I can attach the work order.

They say that the GM trucks must have a dedicated ground through the 7 way plug which I'm sure the new trailers have.

I've hauled many trailers with same truck and the problem cropped up a few months ago. They can't find anything wrong. Can anyone help?

Mike

Attached Files
File Type: pdf Brake Faults .pdf (63.2 KB, 15 views)
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Last edited by OkDually; 01-11-2019 at 04:09 PM. Reason: prefix
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Old 01-11-2019, 04:13 PM   #2 (permalink)
OkDually
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Thread relocated to "Drivetrain - 2011+" for better responses to your issue



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Old 01-11-2019, 04:50 PM   #3 (permalink)
Rvn4me
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Sounds like there not even giving you an effort to fix your truck. Take it someplace else.

Three code, all The other codes come up with nothing. No discrimination etc..

Code:P0674 Modules:ECM Description:Glow Plug 4 Control Circuit #4 bad glow plug

U1556 has a TECH Service Bulletin, which the Trailer Brake Module / Plug may have moisture intrusion & need replacing.

P133B
PIE0401: Engineering Information - Malfunction Indicator Lamp Illuminated with One or More Glow Plug Control DTCs Set - (Mar 9, 2017)
Subject: Engineering Information – Malfunction Indicator Lamp Illuminated with One or More Glow Plug Control DTCs Set

Attention: Proceed with this EI ONLY if the customer has commented about this concern AND the PIE number is listed in the Global Warranty Management / Investigate History link (GWM/IVH). If the customer has not commented about this condition or the EI does not show in GWM/IVH, disregard the PI and proceed with diagnostics found in published service information. THIS IS NOT A RECALL — refer to the latest version of Service Bulletin 04-00-89-053 for more details on the use of Engineering Information bulletins.

Brand:
Model:
Model Year:
VIN:
Engine:
Transmission:

from
to
from
to

Chevrolet
Silverado
2017
2017
L5P
All

GMC
Sierra
2017
2017
L5P
All

Involved Region or Country
North America

Additional Options (RPO)
Equipped with ENGINE-DIESEL, 8 CYL, 6.6L, DI, V8, TURBO, DURAMAX (RPO L5P)

Condition
Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this EI.

Some customers may comment may comment on a malfunction indicator lamp illuminated.

During diagnosis a technician may find one or more of the following DTCs set:

•P06C5
•P06C6
•P06C7
•P06C8
•P06C9
•P06CA
•P06CB
•P06CC
•P066A
•P066C
•P066E
•P067A
•P067C
•P067E
•P068C
•P068E
•P0671
•P0672
•P0673
•P0674
P0675
•P0676
•P0677
•P0678
•P1337
•P1338
•P133A
•P133B
•P133C
•P133D
•P133E
•P133F

Cause
GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be used to "root cause" the customer's concern and develop/validate a field fix.


Correction
If you encounter a vehicle with the above concern, follow SI procedures for any of the DTCs other than P06C5-C or P1337-F.

If any of the DTCs listed in this section are set, clear the codes and relearn the glow plugs. Refer to Glow Plug Learn in SI.

After the glow plug learn procedure has been completed, let the vehicle sit a minimum of 4 hours before starting.

After 4 hours, start the vehicle and verify if any MIL and any DTCs are set.

Contact the engineer listed below to report findings and for further instructions.

Contact Information
Engineer Name
Phone


Please include the following information if leaving a message:

– Technician name
– Dealer name and phone number
– Complete VIN and repair order (R.O) number
On the repair order, document the date and time the call was placed (even if the engineer was not reached).

If engineering is unable to return the call within one hour, proceed with diagnosis and repair based on information found in SI.

Warranty Information
If engineer was contacted or required information was provided, use:

Labor Operation
Description
Labor Time

4081568*
Engineering Information – Malfunction Indicator Lamp Illuminated with One or More Glow Plug Control DTCs Set
0.5 hr

*This is a unique Labor Operation for Bulletin use only. It will not be published in the Labor Time Guide.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

Last edited by Rvn4me; 01-11-2019 at 05:11 PM.
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Old 01-16-2019, 03:16 PM   #4 (permalink)
MaxACL
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The glow plug has been replaced.

About the "check trailer brakes", after they told me they can't find anything wrong, I pull into a new RV lot and plug into two different RVs and the first seemed to work fine, no warnings on the DIC. The second trailer lit up the DIC again.

I need my truck working and with trailer brakes. Has anyone else had this problem and what can I tell the dealer?

Mike
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Old 01-16-2019, 04:44 PM   #5 (permalink)
Ron Nielson
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One thing you may be able to do in the way of troubleshooting on a trailer that displays the DIC message is to use your jumper cables and clamp one end to your trailer hitch and the other end to the trailer's frame. That should provide sufficient (not the best, but sufficient) grounding. If you still have the DIC message, presumably grounding is not the problem.

The thing that mechanics do is to see if there are any DC codes, and also see if they can replicate the problem. If they can do neither, the conclusion is they can't fix the problem. It may be next to impossible, but it looks like you'll have to show up with a trailer attached and the DIC message showing on your DIC.
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Last edited by Ron Nielson; 01-16-2019 at 04:48 PM.
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Old 01-16-2019, 04:54 PM   #6 (permalink)
Rvn4me
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Quote:
Originally Posted by MaxACL View Post
About the "check trailer brakes", after they told me they can't find anything wrong, I pull into a new RV lot and plug into two different RVs and the first seemed to work fine, no warnings on the DIC. The second trailer lit up the DIC again.
I need my truck working and with trailer brakes. Has anyone else had this problem and what can I tell the dealer?
Your DIC message, you say “check trailer brakes” or is it “Service trailer brakes”
Have you ever replace this?
Some people replace this for service trailer brakes.
GM Part :20904439 RELAY, Electronic Brake Control, RELAY,TRAILER BRAKE CONTROL(MATES W/CONNECTOR 13587151) $34.34

Last edited by Rvn4me; 01-16-2019 at 04:59 PM.
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Old 02-03-2019, 01:12 PM   #7 (permalink)
MaxACL
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The message on my dash is both, “check trailer brakes” AND “Service trailer brakes” accompanied by the chime which is about to drive me more nuttier.

I will try the jumper ground wire when the wife get back with my truck.

Do ya'll know what a Texas dilemma is? It's your mother-in-law going over a cliff, in your new truck!
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Old 02-03-2019, 02:16 PM   #8 (permalink)
heymccall
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I'm more inclined to believe the trailer manufacturer has the issue.
If they're electric brake, can you measure resistance in trailer plug between blue and white? Should be approx 1ohm on 2 axle trailer.
Or, are they EOH? Are they both kinds?
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Old 02-03-2019, 02:26 PM   #9 (permalink)
heymccall
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Post #14 here https://www.dieselplace.com/forum/76...er-brakes.html shows the crap job somebody building axles is doing. Could this trailer manufacturer be buying the same axles?
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Old 02-04-2019, 01:27 AM   #10 (permalink)
MaxACL
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Like I said earlier, I deliver new trailers to the dealers and I have the same problem with at least five different manufactures. Everything worked fine for several months then "Ding, Ding, Ding."

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