PIT5365D
Service Bulletin Details
Public Details for: PIT5365D
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 t
- 2020 - 2019 - 2018 - 2017 - 2016 - 2015 - 2014 -
Models from 2020
| 2020 CADILLAC ESCALADE ESV |
| 2020 CHEVROLET SUBURBAN |
| 2020 CHEVROLET TAHOE |
| 2020 GMC YUKON XL |
Models from 2019
| 2019 CADILLAC ESCALADE ESV |
| 2019 CHEVROLET SILVERADO 2500 |
| 2019 CHEVROLET SILVERADO 4500HD |
| 2019 CHEVROLET SUBURBAN |
| 2019 CHEVROLET TAHOE |
| 2019 GMC SIERRA 2500 |
| 2019 GMC SIERRA DENALI |
| 2019 GMC YUKON DENALI |
Models from 2018
| 2018 CADILLAC ESCALADE ESV |
| 2018 CHEVROLET SILVERADO 1500 |
| 2018 CHEVROLET SUBURBAN |
| 2018 CHEVROLET TAHOE |
| 2018 GMC SIERRA 1500 |
| 2018 GMC YUKON DENALI |
Models from 2017
| 2017 CADILLAC ESCALADE ESV |
| 2017 CHEVROLET SILVERADO |
| 2017 CHEVROLET SUBURBAN |
| 2017 CHEVROLET TAHOE |
| 2017 GMC SIERRA |
| 2017 GMC YUKON DENALI |
Models from 2016
| 2016 CADILLAC ESCALADE ESV |
| 2016 CHEVROLET SILVERADO 2500 |
| 2016 CHEVROLET SUBURBAN |
| 2016 CHEVROLET TAHOE |
| 2016 GMC SIERRA 2500 |
| 2016 GMC YUKON DENALI |
Models from 2015
| 2015 CADILLAC ESCALADE ESV |
| 2015 CHEVROLET SILVERADO 2500 |
| 2015 CHEVROLET SUBURBAN |
| 2015 CHEVROLET TAHOE |
| 2015 GMC SIERRA 2500 |
| 2015 GMC YUKON DENALI |
Models from 2014
| 2014 CHEVROLET SILVERADO 1500 |
| 2014 GMC SIERRA 1500 |
Bulletin No.: PIT5365D Published date: 10/15/2019 Preliminary Information PIT5365D Diagnostic Tips Ambient Temperature Display / Information (Topology) Models Brand: Model: Model Years: VIN: from to Engine: Transmissions: Cadillac Escalade Models 2015 - 2020 All All All All Chevrolet Silverado 1500 2014 All All All All Chevrolet Silverado 2015 - 2018 All All All All Chevrolet Silverado LD 2019 All All All All Chevrolet Silverado 2500/3500 2019 All All All All Chevrolet Suburban 2015 - 2020 All All All All Chevrolet Tahoe 2015 - 2020 All All All All GMC Sierra 1500 2014 All All All All GMC Sierra 2015 - 2018 All All All All GMC Sierra Limited 2019 All All All All GMC Sierra 2500/3500 2019 All All All All GMC Yukon Models 2015 - 2020 All All All All Supersession Statement This PI was superseded to update model years, Condition/Concern. Please discard PIT5365C 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 displa yed on the radio, gets from the ambient temperature sensor to the actual radio displa y. Depending on the model, engine and/or radio option, it may vary. The block diagrams below should help clarify any confusi on. -1500 Trucks and All SUV's With IO3/IOB Radio (all engines) Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> ECM >>> (High Speed Lan)>>> BCM >>> (Low Speed Lan) >>> Radio tuner >>> (L VDS Cable) >>> Radio Display -1500 Trucks and All SUV's With IO4, IO5, or IO6 (all engines) Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> ECM >>> (High Speed Lan)>>> BCM >>> (Low Speed Lan) >>> Radio tuner >>> (MOST BUS S) >>> HMI >>> (LVDS Cable) >>> Radio Display -2500/3500 Trucks With IOB Radio (L5P Diesel Engine only) Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> ECM >>> (High Speed Lan)>>> BCM >>>(LowSpeed Lan) >>> Radio tuner >>> (L VDS Cable) >>> Radio Display Note: Trucks equipped with the L5P Diesel engine do have a grille mounted ambient air temperature sensor, but it is not used and is only installed so there is not an open connector. -2500/3500 Trucks with IO5 or IO6 (L5P Diesel Engines only) Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> ECM >>> (High Speed Lan)>>> BCM >>>(LowSpeed Lan) >>> Radio tuner >>> (MOST BUS S) >>> HMI >>> (LVDS Cable) >>> Radio Display Note: Trucks equipped with the L5P Diesel engine do have a grille mounted ambient air temperature sensor, but it is not used and is only installed so there is not an open connector. -2500/3500 Trucks With IO3/IOB Radio (Gas or LML Diesel Engines) 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 (Gas or LML Diesel Engines) Ambient Air Temperature Sensor >>> (hard wired circuits 636 and 61) >>> IPC >>> (Low Speed Lan) >>> Radio tuner >>> (MOST BUSS) >>> HMI >>> (LVDS Cable) >>> Radio Display IMPORTANT INFO FOR 2015 HD TRUCKS ONLY: Midway through the 2015 model year, the Full Size HD Pickup trucks were updated. Theseupdated trucks are now known as 2015i trucks, and they can be easily identified as having the "A VF" RPO code. Any 2015i truck that is equipped with diesel engine (RPO LML) will now have an ambient air temperature sensor that is located in the passenger mirror , which is used for powertrain requirements. The 2015 6.6L diesel trucks (engine RPO LML) built PRIOR to the mid year change 2015i (no RPO A VF) do not have a physical ambient air temperature sensor in the passenger outside mirror for the powertrain requirements. The outside temperature for powertrain requirementsis calculated by the ECM on these models. Some early built 2015i trucks equipped with the 6.6L diesel engine (RPO LML) built before 12/14/14 use the ambient air temperature sensorlocated in the passenger mirror for the temperature displayed on the radio, as well as 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. 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. Theradio outside temperature display will show "- -" if only one of the modules (BCM or IPC) is programmed with thelatest calibrations. The other module will need to be programmed with the latest calibration to correct the issue. Note: For all configurations listed above, after the IPC or BCM sends the ambient air temperature out on the Low Speed LAN buss, the HV AC control module will use this information for HV AC related requirements. 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. 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