The all-new 2021 Chevrolet Tahoe and Suburban and 2021 GMC Yukon and Yukon XL are ready to live up to their legendary nameplates and segment leadership. The fully redesigned models […]
The Air Ride Adaptive Suspension available on the redesigned 2021 Tahoe/Suburban and Yukon/Yukon XL is an automatic level control suspension with a variable rate spring design. (Fig. 11) Fig. 11 […]
The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2021 GMC Yukon and Yukon XL (Fig. 16) and 2021 Chevrolet Tahoe and Suburban. […]
The latest software update for the EL-52545 TPMS/RF Tool (Fig. 18) is now available. The update adds the following features and enhancements: Trailer Tire Pressure Monitoring System (TPMS) learn and […]
Proper installation of the engine oil pan on the 2020 Encore GX and 2021 Trailblazer equipped with the 1.2L engine (RPO LIH) requires that the room temperature vulcanizing (RTV) sealant […]
Some 2014-2019 Corvette models equipped with the 6.2L V8 engine (RPO LT1) and 8L90 automatic transmission (RPO M5U) may have a warble-type sound coming from the rear of the vehicle […]
Owners of some 2020 Encore GX and 2021 Trailblazer models equipped with the 1.3L engine (RPOT L3T) may notice an unstable engine RPM at idle and an illuminated Check Engine […]
A quick look at the exhaust pipe crossover section on 2019-2020 Silverado and Sierra models equipped with a V6 or V8 engine shows that it is not a completely round […]
The cooling system of the 6.2L V8 engine (RPO LT2) on the 2020 Corvette (Fig. 1) is designed to help maintain engine performance under extreme track environments. When filling the […]
Several DTCs may set after replacing the CVT7 transmission (RPO M4M) in some 2014-2015 Spark models. (Fig. 8) The most common codes that may set are P0797 (Pressure Control Solenoid […]
A belt chirp sound or metal-to-metal sound may be heard on some 2019-2020 Silverado HD, Sierra, HD and Silverado 4500HD/5500HD/6500HD models equipped with the 6.6L Duramax diesel engine (RPO L5P, […]
There may be a Service Front Leveling System message displayed on the Driver Information Center on some 2020 Corvette models. DTC U3000 SYM49 (Control Module Internal Malfunction) also may be […]
When diagnosing engine oil leaks on 2019-2020 Silverado, Sierra; and 2020 CT4-V models equipped with the 2.7L turbocharged 4-cylinder engine (RPO L3B) (Fig. 16), inspect the dipstick tube O-ring and […]
Some 2019-2020 Silverado and Sierra models may have any of several electrical-related concerns, including no crank, starter engages after engine start, flickering headlamps, erratic instrument cluster gauges, or high or […]
The enhanced exhaust brake is one of several improvements in 2020 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P). The exhaust brake feature can be […]
Some 2020 Encore GX and 2021 Trailblazer models may have several electrical conditions, including no audio from the radio, an inoperative power liftgate (RPO TC2), if equipped, and/or an inoperative […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM certified repairs. The latest service topics from GM Brand Quality and Engineering covered in […]
Repair or Replace? New Program Identifies 9T65 Transmission Replacements
Inspection/Maintenance Test DTCs Now Permanent DTCs
Run Techline Connect as Admin to Receive Updates Automatically
Properly Lifting the Corvette
DEF Pump Unable to Build Pressure After Replacement
Engine Oil Pump Pressure Control
Quarter Panel Rattle Sound
Removal of Corvette Z51 Spoiler
Disabling Systems After Pickup Box Removal
Proactive Alerts – Updated Service Procedures and Warranty Information
UPDATE: Vehicle Intelligence Platform Announced
2020 Corvette TAC Action Center
Techline Connect Now Available on the GlobalConnect App Center
Intermittent Parasitic Battery Draw Below 40° F/4° C
Front Fender and Fascia Realignment
Questions on Associated Accessories?
GM Service Know-How Emerging Issues
Corvette Track Prep Requirements
Fuel Injection & Cooling System Tools
TechPRO Professional
Aftermarket Diagnostics
Tips for Warranty Reprogramming Events
Techline Connect Setup
for Updates
The new GM ToolNet special service tools inventory management application is now available to GM dealerships in the U.S. The Canadian application launches on April 20. To access the site, […]
Enter a few keywords in the Search box of the Service Information (SI), click the Search button, and all related results are shown. (Fig. 1) In some cases, depending on […]
GM models feature a variety of technology and new systems that may be unfamiliar to technicians and service consultants in GM dealerships. Following are several videos highlighting new features to […]
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