NHTSA ID Number: 10127219
Manufacturer Communication Number: PIC6131
Summary
This Preliminary Information communication provides information to the technician about vehicles that the air conditioner blows warm air. If normal diagnostics from service information does not lead to a correction and it is found that the air conditioning compressor is not engaging check for any communication codes in the vehicle and address them first. It has been found in some cases that there is no communication with the sensing and diagnostic module that was causing the air conditioning compressor to not engage.
64 Affected Products
Vehicles
CADILLAC | ESCALADE | 2009-2013 |
| CADILLAC | ESCALADE ESV | 2009-2013 |
| CADILLAC | ESCALADE EXT | 2009-2013 |
| CHEVROLET | SILVERADO 1500 | 2009-2011 |
| CHEVROLET | SILVERADO 2500 | 2009-2013 |
| CHEVROLET | SILVERADO 3500 | 2013 |
| CHEVROLET | TAHOE | 2008-2013 |
| GMC | SIERRA 2500 | 2009-2013 |
| GMC | SIERRA DENALI | 2009-2013 |
| GMC | YUKON | 2008-2013 |
| GMC | YUKON DENALI | 2008-2013 |
| GMC | YUKON DENALI XL | 2008-2013 |
| GMC | YUKON XL | 2008-2013 |
SEOCONTENT-START
Bulletin No.: PIC6131
Date: Sep-2015
| Subject: | Hybrid – A/C Compressor Will Not Engage |
| Models: | 2009-2013 Cadillac Escalade |
| 2009-2013 Chevrolet Silverado LD |
|
| 2008-2013 Chevrolet Tahoe |
|
| 2009-2013 GMC Sierra LD | |
| 2008-2013 GMC Yukon | |
| Hybrid 2-Mode (HP2) Vehicles |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may state that the AC blows warm
After normal diagnosis you find that the AC compressor will not engage and the RPM are showing zero when using the scan tool.
Recommendation/Instructions
If a concern is not found using normal diagnosis, check for any communications codes on the vehicle and address any current communications codes first.
There have been cases at technical assistance where there was no communication with the Sensing and Diagnostic module ( SDM ) that was causing the AC compressor not to engage.
Once the communication was restored, the AC worked correctly
Additional note: Some technician may state that the Evaporator Temperature sensor is not reading correctly in the HVAC module under sensor data.
Some 2 mode hybrid vehicles were equipped with a evaporator temp sensor but it is not used because the vehicle uses a low pressure sensor in place of the evaporator temp sensor. This parameter should be ignored and will not cause the AC compressor not to engage.
Warranty Information
The correction for this concern may be one of several repairs described above. For vehicles repaired under warranty, please use the appropriate warranty labor operation based on the actual cause and repair.
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.
SEOCONTENT-END
Bulletin No.: PIC6131
Date: Sep-2015
To View or Download this Document Click Here
- [Diagnose Like a Pro] BlueDriver Pro Next-Gen is a professional OBD2 scanner and diagnostic tool that helps you scan, understand, and clear vehicle trouble codes with confidence. Turn your phone into a powerful car diagnostic scanner—no guesswork, no unnecessary repairs.
- [Read and Clear More Codes Than Ever] Read and clear more codes than basic car code readers. Access enhanced diagnostics for Check Engine, ABS, SRS, Airbag, TPMS, Transmission, and more on supported vehicles, including expanded coverage on newer model years.
- [Verified Fixes and Real-Time Data] Get unlimited, technician-verified repair reports matched to your VIN, with definitions, causes, and confirmed fixes. Monitor live vehicle data as you drive, view freeze frames, check smog readiness, and analyze Mode 6 test results.
- [Expanded Make & Model Coverage] Optimized for today’s vehicles with strong support for GM, Ford, Stellantis (RAM, Jeep, Chrysler), Toyota, Honda, Nissan, Mazda, Subaru, Hyundai, Mercedes-Benz, BMW, and VW. Enhanced communication on select 2024+ Nissan and Mazda models (see compatibility chart).
- [Gas Vehicles 1996+ & Select Light-Duty Trucks] Works with all gas-powered vehicles made in 1996 or newer, plus select light-duty trucks and diesels, including F-250, RAM 2500, Silverado, and Sierra. Built for daily drivers, family vehicles, and real-world truck use.
- MAINTAIN PEAK PERFORMANCE AND SAFETY ON THE ROAD - Easily find and fix the problem with your vehicle using the INNOVA 5610 bidirectional scan tool. This OBD2 scanner diagnostic tool provides real-time solutions to troubleshoot issues. Access OBD2 and OEM live data with ease, making it an essential car scanner diagnostic tool. Perfect for those seeking reliable car diagnostic scanner and code readers & scan tools for vehicles.
- PRO-LEVEL FUNCTIONALITIES - Use the INNOVA 5610’s Enhanced Data Stream to view live data for advanced systems like ABS, SRS, transmission, and engine. The Special Reset Function lets you use dealership-level re-learn procedures. This car diagnostic scanner is ideal for those needing a bidirectional scan tool or mechanic tools automotive for professional repairs. Compatible with select vehicle makes and models; not universal.
- COMMAND WITH BIDIRECTIONAL CONTROLS - The INNOVA 5610 bidirectional scan tool sends commands to test functions such as fuel pump on/off or retracting the electronic parking brake. With this car scanner diagnostic for all cars, you can operate like a pro. Ideal for those seeking a car code reader and reset tool or advanced fixd car diagnostic tool capabilities. Compatible with select vehicle makes and models; not universal.
- EASY TO USE - The INNOVA 5610 OBD2 scanner diagnostic tool supports English, Spanish, and French. Easily use this scanner for car on most 1996 - 2023 (2024 coming soon) OBD2 vehicles to verify repairs. Designed for ease of operation, it’s a dependable code reader for cars and trucks and check engine code reader. To confirm vehicle coverage, please utilize Innova's Coverage Checker.
- BUY AND DRIVE WITH CONFIDENCE - Backed by ASE-Certified support, this car scanner pairs with the RepairSolutions2 app, trusted by 4M users, for wireless OBD scanner functionality. With free updates and no subscription fees, this durable car computer diagnostic reader ensures you’re prepared for any repair. A must-have diagnostic scanner for vehicles.
- [2026 Top-Tier Hardware and Software Upgrade]: Topdon ArtiDiag900 Lite scanner has enhanced hardware and latest features, including Android 11.0, 5x faster CPU, 10000mAh battery for 12 hours of continuous operation, stable wireless diagnosis with Bluetooth 5.0, 8-inch touchscreen. Added bi-directional control, wireless diagnosis, battery testing (optional), and DTC repair guide
- [TOPDON Bidirectional Scan Tool]: This bidirectional obd2 scanner sends commands to the vehicle's ECU for active testing, enabling users to accurately and quickly locate faulty components such as injectors, coolant pumps, windows, wipers, headlights, mirrors, etc. The bidirectional control scanner is the ideal choice for workshops/automotive repair shops as it significantly reduces mechanic's diagnostic time.
- [Wireless Bluetooth Diagnostic Experience]: The AD900 Lite scan tool comes with a Bluetooth 5.0 VCI, supporting a wireless diagnostic range of up to 33 feet (10 meters), allowing you to diagnose without being confined to cables or tight spaces. Stable and fast wireless diagnosis provides a comfortable repair environment. It also offers VCI cables to increase connectivity options.
- [DTC Repair Guide Function]: Easily diagnose issues with your vehicle and receive guidance on repairs with the topdon scan tool's fault code definitions for all systems,maximize your diagnostic capabilities. This function is compatible with Chrysler/Dodge/Jeep/Fiat 2010-2014 and expanding with continual updates,the AritDiag 900 Lite car diagnostic scanner is the must-have tool for any technician or DIY enthusiast.
- [OE-Level Full System Diagnostics]:AritDiag900 Lite full system diagnostic scanner can scan ALL available modules(Engine, Transmission, Airbag, ABS, ESP, TPMS, Gateway, Steering, Radio, Air conditioning, ect.) to✔read ECU info, ✔read/clear codes, ✔view live data stream, ✔retrieves freeze-frame, ✔perform active tests, and more. With just a simple click, it provides you with accurate and in-depth diagnostics.
- [Full-System Diagnostics, High-Performance Diagnostic Tool] - The new topdon scanner ArtiDiag600 Pro (AD600 Pro) is an upgraded version of AD600, AD600S, and AD500. It offers a scan and analyzes full-system diagnosis, including the Engine, Transmission, ABS, BCM, Airbag, Chassis and Powertrain, etc. This scan tool identifies fault codes, assesses vehicle conditions, and retrieves fault codes to help diagnose issues. Note: The Function menu varies by vehicle's specifics.
- [9 Essential Maintenance Functions] - TOPDON AD600 Pro diagnostic tool offers support for regular vehicle maintenance with 9 essential maintenance functions, including ABS Bleeding, Battery Matching, Brake Reset, Oil Reset, DPF Regeneration, Throttle Relearn, Injector Coding, SAS Reset, and TPMS Reset, enabling you to perform Conveniently services. Note: Function menu varies by vehicle’s specifics. Contact our customer support to ensure the features you need are supported for your specific model.
- [Supports CAN-FD & FCA Autoauth Protocols—Diagnose Modern Vehicles] - The artidiag600 Pro OBD2 scanner supports the communication protocols, including CAN- FD and FCA Secure Gateway Access Protocol. The advanced compatibility allows it to work in collaboration with a wider range of modern vehicles equipped with newer systems, helping you perform more accurate diagnostics. Note: Access to some protocols may require an additional purchase or subscription.
- [Full OBD2 Function, Live Data & Freeze Frame Data] - ArtiDiag600 Pro is the OBD2 scanner diagnostic tool for DIYers, home mechanics, and professionals. It supports all 10 OBD2 modes, allowing you to read and clear DTCs, view, graph, record, replay, and overlay live data streams, as well as capture dynamic data to monitor key performance metrics as needed. The obd scanner can display up to four data streams at the same time, giving you a real-time overview of system performance for faster and more accurate diagnosis.
- [Lifetime Free Updates & Enhanced Performance] - Stay up to date with the latest vehicle compatibility, features, and improvements through convenient one-click lifetime updates via Wi-Fi. Equipped with upgraded hardware, this diagnostic scan tool delivers smoother and faster performance with 2GB RAM and 32GB ROM. The Android 11.0 operating system ensures stable and responsive operation, while the large 5-inch touch screen with a 1280×720 HD display provides clear, detailed diagnostic information for an improved user experience.
Last update on 2026-06-11 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.