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GMC SUV/Van/Pickup Truck Diagnostic Software

Advanced Diagnostic Scanner for GMC Light & Medium Vehicles

GMC Diagnostic Scan Tool

GMC is a popular vehicle brand of General Motors, focused solely on trucks, SUVs, vans, and light/medium-duty vehicles rather than heavy commercial vehicles. Several models are available, with North America being the most stable and mature market for GMC sales.

For owners, technicians, and service centers of GMC light & medium duty vehicles, our GMC diagnostic scan tool is an indispensable software to keep the vehicles in optimum running condition. It is a multi-brand and multi-system software with step-by-step guides, images, and detailed wiring diagrams that help to quickly diagnose and clear fault codes.

The advantage here is that the software offers broad module coverage, helping technicians to perform both basic and advanced troubleshooting activities without switching tools for various brands of systems and components.

Apart from GMC light & medium vehicles, the Jaltest scanning and diagnostic software is also available for other applications. These are commercial and construction equipment, material handling equipment, marine engines, and more.

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Wide Coverage of Models by GMC Diagnostic Scan Tool

Our GMC trouble codes reader supports a wide range of GMC light and medium-duty vehicles from General Motors. They are as follows:

  • Avalanche: Avalanche [2000-2006], Avalanche [2007-2013]
  • Blazer: 2.8 Diesel Electronic
  • Canyon/ Colorado: 2000-2013, 2014-2022, 2023
  • F series
  • LCF: 3500/4500, 3500HD, 4500HD/5500HD
  • S10 I: S10 2.8 Diesel Electronics
  • S10 II: S10 2.8 CTDI
  • Savana/Express
  • Sierra/Silverado
  • T Series
  • W Series/ N Series and others
However, in the current configuration, the software coverage is not uniform across models. For example, in the Avalanche models, software support is offered for brakes, Central Computer, Electronic Module, Engine, Instrument Cluster, and Transmission, while only Engine coverage is available for the Blazer brand. Support for aftertreatment systems like forced regeneration is offered only to the F Series.

Scanner software screenshot

Extensive Support to Engines and Transmissions Used in GMC L&M-duty Vehicles

Our GMC scan tool is compatible with a range of engines, transmissions, systems, and components used in GMC vehicles. They are as follows:

Supported Engine Brands:

  • GM (Chevrolet/GMC): Gasoline ECMs (L-Series engines)
  • GM Duramax (with Isuzu) Diesel ECMs (LB7, LLY, LBZ, LWN, LF8)
  • Isuzu 4HK1, 6HK1, 4JJ1, diesel engines
  • Bosch/Isuzu EDC16 C9 common rail diesel control

Other Supported Components:

  • GM (Chevrolet/GMC): Most body, audio, HVAC, immobilizer, BCM, ICM, SIR, PSCM, ABS modules.
  • Allison: Transmission ECUs for 1000/2000 series.
  • Aisin: Transmission ECUs (A460/A465).
  • Isuzu: Mimamori, Smoother transmission.
  • Bosch/Delphi (suppliers): ABS/ASR, EBCM, BCM variants, suspension modules.



The benefit here is that this single diagnostic tool is compatible with several types of systems, components, engines, and transmissions used in GMC vehicles. It can seamlessly be used as an Isuzu diesel engine diagnostic tool, an Aisin fault code reader, an Allison diagnostic tool, and more.

Scanner software screenshot

Advanced Features of the GMC Troubleshooting Scan Tool

Our GMC diagnostic scanner software is packed with cutting-edge features that help technicians quickly troubleshoot minor issues before they become major problems, leading to downtime.

These are some of the advanced features of the software:

Diagnostics & Data:

  • Read & Clear Fault Codes (Freeze Frame Data, TS Smart Guides)
  • Monitor Live Data, Measurements, and Data Recording
  • System and Operation Data and more

Advanced Service Functions (Special Functions):

  • Bleed braking System
  • Compression Test
  • Cylinder cut-out test
  • Gearbox clutches performance check and more

Calibrations & Parameter Setting:

  • Speed limit
  • Exhaust Brake
  • Cruise Control
  • Power take-off configuration
  • Injector coding and more


The software allows technicians to carry out full system scans periodically to ensure that all systems and components are working optimally. Alternatively, they can troubleshoot by symptoms as and when a fault code pops up on the onboard computer.

Scanner software screenshot

User-Friendly Attributes of the GMC Code Reader

One of the primary reasons why our GMC diagnostic scan tool is a cut above others in this niche is the user-friendly attributes that simplify fault code identification and resolution.

For example, consider the screen regarding the Component Replacement Guide of the Main Casing of a TCM Allison 1000/2000 transmission used in GMC/Chevrolet Avalanche produced between 2000 and 2006.

The software first guides you through the pre-steps before the replacement, giving you safety information and warning you to disconnect the batteries. Then, it shows the detailed Removal Procedure step-wise, such as removing the parking linkage, removing the C3 clutch apply piston, and removing the washers. With all these details, technicians can carry out troubleshooting activities that are no less than the standards maintained at the dealer level.

We also provide three updates every year to our GMC diagnostic scanner. This is to make sure that our software remains relevant even after any technological innovations are made to systems in GMC vehicles.

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Jaltest Coverage for GMC

3500/4500 [2016-...]- ENGINE: 6.0 V8 GAS/CNG
3500/4500 [2020-...]- ENGINE: 6.6 V8 GAS
3500HD [2016-...]- ENGINE: 4JJ1-TC
4500HD/5500HD [2016-...]- ENGINE: 4HK1-TC
4500XD/5500XD/6500XD/7500XD [2016-...]- ENGINE: 4HK1-TC
AVALANCHE [2000-2006]
AVALANCHE [2007-2013]
BLAZER 2.8 DIESEL ELECTRONIC [2005-2009]- ENGINE: 4.07 TCE
C SERIES [2000-2009]
CANYON/COLORADO [2000-2013]
CANYON/COLORADO [2014-2022]
CANYON/COLORADO [2023-...]- ENGINE: TURBOMAX 2.7L L3B
CAT ENGINE
D-MAX 3.0 DIESEL TURBO- ENGINE: 4JJ1-TC
F SERIES- ENGINE: 4HK1-TC
F SERIES- ENGINE: 6HK1-TC
LUV DMAX
S10 2.8 CTDI [2012-...]- ENGINE: XLD28
S10 2.8 DIESEL ELECTRONICS [2005-2012]- ENGINE: 4.07 TCE
SAVANA/EXPRESS [2000-2007]
SAVANA/EXPRESS [2008-2013]
SAVANA/EXPRESS [2014-...]
SIERRA CLASSIC/SILVERADO CLASSIC [2007-2007]
SIERRA/SILVERADO [2000-2006]
SIERRA/SILVERADO 1500 [2022-...]- ENGINE: ECOTEC3 5.3L L84
SIERRA/SILVERADO 1500 [2022-...]- ENGINE: ECOTEC3 6.2L L87
SIERRA/SILVERADO 1500 [2022-...]- ENGINE: TURBOMAX 2.7L L3B
SIERRA/SILVERADO 1500 [2022-2022]- ENGINE: DURAMAX 3.0L LM2
SIERRA/SILVERADO 1500 [2023-...]- ENGINE: DURAMAX 3.0L LZ0
SIERRA/SILVERADO HD 2500-3500 [2024-...]- ENGINE: 6.6L L8T
SIERRA/SILVERADO HD 2500-3500 [2024-...]- ENGINE: DURAMAX 6.6L L5P
SIERRA/SILVERADO/CHEYENNE [2007-2013]
SIERRA/SILVERADO/CHEYENNE 1500-3500 [2014-2023]
SILVERADO HD 4500-6500 [2018-...]
T SERIES [2000-2009]
W SERIES/N SERIES [...-2003]- ENGINE: 5.7 V8 GAS L31
W SERIES/N SERIES [...-2004]- ENGINE: 4HE1-TC/XS/XN
W SERIES/N SERIES [2004-2007]- ENGINE: 6.0 V8 GAS LQ4
W SERIES/N SERIES [2005-2010]- ENGINE: 4HK1-TC
W SERIES/N SERIES [2008-2009]- ENGINE: 6.0 V8 GAS LY6
WT5500 [2000-2005]- ENGINE: 6HK1-TC
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