18078: Service Update – Tow/Haul Mode IPC Telltale Not Functioning – 2018 Chevrolet Colorado & GMC Canyon

#18078: Service Update – Tow/Haul Mode IPC Telltale Not Functioning – (Mar 23, 2018)

Subject: 18078 — Tow/Haul Mode IPC Telltale Not Functioning
Models: 2018 Chevrolet Colorado
2018 GMC Canyon
Equipped with Tow/Haul Mode Activation “On” Calibration (RPO 5G8)

Reference Number: N182151190 Release Date: March 2018
Revision: 00
Attention: This service update includes vehicles in dealer inventory and customer vehicles that return to the dealership for any reason. This bulletin will expire at the end of the involved vehicle’s New Vehicle Limited Warranty period.
Make Model Model Year RPO Description
From To
Chevrolet Colorado 2018 2018 5G8 Tow/Haul Mode Activation “On” Calibration
GMC Canyon 2018 2018 5G8 Tow/Haul Mode Activation “On” Calibration

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2018 model year Chevrolet Colorado and GMC Canyon vehicles equipped with a tow/haul mode activation “On” calibration (RPO 5G8) that recently had service repairs for either; #18-NA-005: Diagnostic Tip for Instrument Panel Cluster (IPC) Low Washer Indicator Not Setting a Warning When Empty – (Jan 16, 2018) or #17466: Service Update – Timing Belt Message Displayed at 100,000 Miles (160,000 KM), Not 150,000 Miles (240,000 KM) Per Specifications – (Jan 17, 2018), may have received an incorrect instrument panel cluster (IPC) XML file resulting in the tow/haul mode telltale display to not illuminate when it is on. This does not apply to any vehicles reprogrammed on or after March 20, 2018.
Correction Dealers are to reprogram the IPC.


Parts Information

No parts are required for this repair.


Warranty Information

Labor Operation Description Labor Time Trans. Type Net Item
9102953* Instrument Cluster Reprogramming with SPS 0.3 ZFAT N/A
9103738** Module Programming Not Required 0.2 ZFAT N/A

* To avoid warranty transaction rejections, the SPS Warranty Claim Code(s) must be entered when submitting this transaction.

** SPS Warranty Claim Code is NOT required when submitting this transaction.


Service Procedure

Note: Carefully read and follow the instructions below.

  • Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or control module damage may occur.
  • Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. When required install the EL-49642 SPS Programming Support Tool to maintain system voltage. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.
  • Turn OFF or disable systems that may put a load on the vehicles battery such as; interior lights, exterior lights (including daytime running lights), HVAC, radio, etc.
  • Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to NO.
  • If the Same Calibration/Software Warning is noted on the SPS Controller screen, do NOT attempt to program the module. No further action is required. Refer to the Warranty section of the bulletin and use labor operation code 9103738, Module Programming Not Required.

Reprogram instrument cluster

  1. Reprogram instrument cluster. Refer P16 Instrument Cluster: Programming and Setup in SI.
  2. Once reprogramming is complete, with vehicle running, press the “Tow/Haul” button and confirm the light illuminates on the instrument cluster.
  3. Record SPS Warranty Claim Code on job card for warranty transaction submission.


Dealer Responsibility

Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your facility for service in the future, and the vehicle is still covered under the New Vehicle Limited Warranty, you must take the steps necessary to be sure the service update correction has been made before selling or releasing the vehicle.

All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers’ possession and subject to this bulletin must be held and inspected/repaired per the service procedure of this bulletin before customers take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded, released to auction, used for demonstration, or any other purpose.

All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System (CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified for sale within the CPOIS system, or once again be used in the CTP program.


GM Diagnostic/Programming (TIS2Web)

Approved J2534 Device with TIS2WEB can reprogram 1996 and later All GM Modules.

To obtain the latest electronic controller calibration information for your vehicle, go to https://tis2web.service.gm.com/tis2web and enter the vehicle’s 17 character Vehicle Identification Number (VIN) and select ‘Get CAL ID’.

You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.

The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.

The following are the supported interface tools:

OEM GM Tech 2 Dealer Package
Bosch GM MDI 2 (2nd Gen) MDI2 interface
Drew Tech CarDaq-Plus 2 SAE J2534-1/2 Reflash Reprogramming Tool OEM Diagnostics
Drew Technologies (DRWCDPLUSKIT) CarDAQ-Plus J2534 Flash Reprogramming Kit
Drew Tech CarDaq-M 2 SAE J2534-1/2 Reflash Reprogramming Tool OEM Diagnostics
Drew Tech Mongoose Pro Oem Diagnostics And Programing Cable General Motors GM 2  
VSI J2534 ECU Reprogrammer & Diagnostic Adapter
Autel MaxiFlash Elite J2534 ECU Programming Tool
Autel (AULMF2534) MaxiFlash Pro
Dearborn d-Bridge Adapter J2534 OBDII Engineering Tool

The Tech 2 supports model years 1996 and beyond. With the addition of the CAN Diagnostic Interface (CANdi) module, Tech 2 is fully backward compatible with current Tech 2 functionality and operates transparently when diagnosing non-CAN-equipped vehicles.

Servicing the next generation Global A vehicles will require the diagnostic software, GDS2, Global Diagnostic System 2 running on a local PC device while the MDI is connected to the vehicle.

The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles. The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Click here to view a list of GDS supported vehicles.



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