NHTSA ID Number: 10114567
Manufacturer Communication Number: PIT5365C
TSB/Document Date: 2017-08-15
Summary
This Preliminary Information communication provides information to the technician on how the radio display gets the air ambient temperature. On 1500 series trucks and all sport utility vehicle with regular production option code IO3 radio the ambient air temperature sensor is hard wired to the engine control module and then the signal goes on high speed local area network to the body control module from there on low speed local area network to the radio. On 1500 series trucks and all sport utility vehicle with regular production option code IO4, IO5, or IO6 the ambient air temperature sensor is hard wired to the engine control module and then the signal goes on high speed local area network to the body control module from there on low speed local area network to the radio then Most 50 Bus to the Human Machine Interface. On 2500/3500 series trucks production option code IO3 radio the ambient air temperature sensor is hard wired to the instrument panel cluster and then the signal goes on low speed local area network to the radio. On 2500/3500 series trucks production option code IO4, IO5, or IO6 radio the ambient air temperature sensor is hard wired to the instrument panel cluster and then the signal goes on low speed local area network to the radio then Most 50 Bus to the Human Machine Interface.
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
- MaxLife Technology prevents engine breakdown with 40% better...
- Includes seal conditioners to reduce oil consumption and oil...
- Added detergents reduce sludge, corrosion, rust and deposits...
- Advanced friction-fighting additives help maximize...
- Meets or exceeds all requirements of ILSAC GF-6A, API SP...
This product presentation was made with AAWP plugin.
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: PIT5365C
Replacement Service Bulletin Number:
MFR Communication Date: 2015-05-21
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM:SOFTWARE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Bulletin No.: PIT5365C
Date: May-2015
Subject:
Diagnostic Tip - Ambient Temperature Display / Information (Topology)
Models:
2015 Cadillac
Escalade Models
2015 Chevrolet Tahoe, Silverado, Suburban
2014 Chevrolet Silverado 1500
2015 GMC Sierra, Yukon Models
2014 GMC Sierra 1500
This PI was superseded to update Condition/Concern. Please discard PIT5365B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
There has been some confusion on how the temperature reading that is displayed on the radio, gets from the ambient temperature sensor to the actual radio
display. Depending on the model and radio option, it may vary. The block diagrams below should help clarify any confusion.
-1500 Trucks and All SUV's With IO3 Radio
Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> ECM >>> (High Speed Lan)>>> BCM >>> (Low Speed Lan) >>> Radio tuner >>>
(LVDS Cable) >>> Radio Display
-1500 Trucks and All SUV's With IO4, IO5, or IO6
Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> ECM >>> (High Speed Lan)>>> BCM >>> (Low Speed Lan) >>> Radio tuner >>>
(MOST BUSS) >>> HMI >>> (LVDS Cable) >>> Radio Display
-2500/3500 Trucks With IO3 Radio
Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> IPC >>> (Low Speed Lan) >>> Radio tuner >>> (LVDS Cable) >>> Radio Display
-2500/3500 Trucks with IO4, IO5, or IO6
Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> IPC >>> (Low Speed Lan) >>> Radio tuner >>> (MOST BUSS) >>> HMI >>> (LVDS
Cable) >>> Radio Display
Important: For all 2500/3500 radio combinations listed above, some early built 2015i trucks (RPO AVF = 2015i mid year change) equipped with 6.6L diesel
engine (RPO LML) built before 12/14/14 use the ambient air temperature sensor located in the passenger mirror for the temperature displayed on the radio,
HVAC and powertrain requirements. If the BCM and IPC are reprogrammed with the latest calibrations in TIS2WEB, this will change the operation of the radio
and HVAC topology to what is shown above. This is how these trucks built since 12/14/14 come programmed. The grille mounted ambient air temperature
sensor will now be used for the radio and HVAC requirements, and the passenger mirror sensor will now only be used for powertrain requirements. The radio
outside temperature display will show "- -" if only one of the modules (BCM or IPC) is programmed with the latest calibrations. The other module will need to be
programmed with the latest calibration to correct the issue. The 2015 6.6L diesel trucks (RPO LML) built PRIOR to the mid year change 2015i (i.e. NOT
equipped with RPO AVF) do not use a physical ambient air temperature sensor in the passenger outside mirror for the powertrain requirements.The outside
temperature for powertrain requirements is calculated by the ECM. The radio outside temperature display and HVAC requirements will still follow the 2500/3500
topology listed above.
Note: For all the 1500/2500/3500 radio configurations listed above, after the IPC or BCM sends the ambient air temperature out on the Low Speed LAN buss,
the HVAC control module will use this information for HVAC related requirements.
ADDITIONAL SI KEYWORDS
1
dash dashes
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the
remaining steps do not need to be performed.
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.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
2
- WHY CHOOSE THE 2025 CR MAX -Upgrade the latest diagnostic capabilities for all vehicles after 1996: upgrade to 49+maintenance services; 46 extra specific functions; real all systems/all control modules diagnose; over 40K+ bidirectional actuation tests for diagnosing all control moduels of cars; Powerful full OBD2 Functions; built-in ECU Coding for BMW
/ Audi/ VW/ RollsRoyce; Fr ee V.A.G Guide Function; Battery retistration for new battery adaptation and more. It covers all vehicle diagnostic services and some special professional vehicle maintenance servces, assists you to do home DIY vehicle maintenance or car repair as a pro technician. - NEWEST IN INNOVATION FULL OBD2 SERVICES- iCarsoft auto car diagnostic scanner compatible with CAN-FD, CR MAX can do it all-reads and clears trouble codes, ALL SYSTEM DIAGNOSIS such as engine, transmission, ABS and airbag etc. CR MAX code reader for all cars can perform I/M Readiness, Live Data, Freeze Frame, Vehicle Information, Monitor Test, On-Board Monitor, E vap System Test,O2 Sensor Test,DTC Library Lookup,etc. (Warm Tips: If you car is after 2023,please contact us for compatibility; 3. It comes with 16PIN OBD2 diagnostic adapter, please check your car diagnostic socket if it is 16pin socket, if your car is 14pin diagnostic socket please contact us for the solution.)
- 49 RESET+ 46 SERVICES- Performs: Oil Reset, EPB,SAS,Throttle, D-P - F, Battery, ABS, Injector, TPMS, Suspension, AC, Head Lamp, Body Stablity, Engine, Tramsmission, Airbag, Seat, Door-Win-Roof, Fuel Pump, Door, E-G- R.+21 NEWEST SERVICES( Need update scanner)-AdBlue, Clutch, Crankshaft, High Voltage Battery, Cruise Control, NO xSensor, Rain Sensor, Stop And Start, Turbocharger, Head Up Display, Radar Camera, Vehicle Setup, Cyliner Misfire Check,Speedlimitassist, ControlUnitReset,OxygenSensor, Seatbelt. Extra 46+ extra services based on car brand.(Tips: Quantity of reset/ calibration fucitons are based on car system that your vehicle model has)
- REVOLUTIONARY 40000+BIDIRECTIONAL ACTIVE TESTS: Upgraded CR Max scanner equip with numberous of actuational test items for covering all available vehicle control modules, no longer only do simple light test or window test like other scanners, performs hardware modules test and software control modules test for checking car units or new updated control moduels work well or not after maintenance/ repair/ re-installation/ control system updated (Example for Benz- Roller Sun Blind test; Backup Camera test ;Self-test; EPB test; Transport Mode test;Boost Pressure Positioner test; Fuel Pump test; AND MORE!!).(Warm tip: The available test items are based on control modules your car has)
- ECU CODING+ BATTERY REGISTRATION- Powerful ECU Coding service for BMW/MINI/RollsRoyce / Audi/VW/Seat/Skoda/Bentley/Bugatti/Lamborghini, Improves Engine Power Performance and Optimizes Fuel Efficiency and Match New Hardware Unit to car and Customized a comfortable Driving Modes and Fixes & Updates Original Software Bug. The battery test function for checking car battery health, perform battery reset (BMS ) for replacing a damaged or aging car battery with a new one and register new battery to car ECU
- Scanner POR V2.0 with all obd2 services
- Do the scanning for engine
- Support OBDII/EOBD Ten Modes of Operation
- 【Designed for Most Mercedes-Benz, Sprinter and Smart from 1996-2023】As every car model of Benz has its-owned specific car system and ECUs, not all models are equipped with a complete vehicle ECU, which may cause the scanner to be unable to perform all listed reset services on some models, or even completely incompatible. Like For Sprinter's newer models, it support diagnostic functions only, lacking support for specialized service functions.. So please tell us the car's VIN and required service before purchase for compatibility check. You may also refer to the instructions in the eighth image of the main product photos to perform your inquiry.
- 【Up to 38 Reset Services】MB V3.0 2026 Version diagnostic tool performs Up to 38 maintenance services - Oil Rest , SAS, EPB, ETC, D-P-F, TPMS, ABS, Suspension, Air Conditioner, Head Lamp, Body Stability, Engine Control, Seat, Fuel Pump, Air-Filter, Engine Idle, Door, Im-mo-bilizer, Injector Coding, Transmission Control, Miscellaneous, Adblue, BMS, Cluth, Water Pump, NOxSensor, Rain/Light Sensor, Start/Stop, Radar/Camera, Cylinder Shutoff Test, Speed Limit Assist, Control Unit Reset, Oxygen Sensor, Seat Belt, Cruise Control System, Turbocharger, Crankshaft, Language Setting and etc. (Tips: Please update the software after receiving the product to obtain new service functions)
- 【OE-Level All System OBD2 Scanner】iCarsoft MB V3.0 (2026 Version) diagnostic scanner offers comprehensive OBDII services, allowing you to quickly scan all systems, including the Engine, ABS, SAS, SRS, TPMS, TCM, Fuel Pump System, ESP, EPB, EPS, Suspension, SCM, Adaptive Systems, and more. It supports functions such as reading and erasing codes, checking I/M readiness, viewing freeze frame data, performing O2 sensor tests, conducting on-board monitoring, testing the evap system, auto VIN retrieval, and reading both generic and specific codes, as well as DTCs and battery tests.
- 【Bidirectional Scan Tool】iCarsoft MB V3.0 (2026 Version) Bidirectional scanner supports activate or control a vehicle system or component, allows commanding cars’ modules and receiving info from the ECU to perform active tests on individual components, including EVAP/ABS Motor Pump/Windows/Sunroof and more, to pinpoint fault causes & resolve issues,and allows you to re-learn certain components after making repairs or replacement.
- 【Real Time Record & Graph View】iCarsoft MB V3.0 (2026 Version) can automatically record vehicle text history and identify vehicle information. Preserve real-time data information. View & Graph Live Data. Support Data Review and Print. Multi-language: English, German, Dutch, Spanish, French and so on. We promise to offer Lifetime updates (Lifetime free Update via PC), and confidence in products. We also provide 1 year warranty + extra lifetime hardware free repair if you need it in the future. We prioritize user experience & strive to meet your expectations. Please do feel free to reach out to us if you have any question or problem about the usage, our tech team will service you in time.
This product presentation was made with AAWP plugin.
Last update on 2026-05-13 / Affiliate links / Images from Amazon Product Advertising API