car repair guide technician

Increase technician efficiency and build customer loyalty as you accurately and efficiently repair more makes and models with GEM-FIX the repair guide software that integrates with Mitchell, Alldata, Identifix... Throw away that obsolete paper auto repair manual and join the hundreds of thousands of technicians who rely on the content from GEM-FIX every day.

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GEM-FIX serves the automotive aftermarket through WorkshopData. Its database contains a vast amount of multilingual automotive OEM-based data for cars, light commercial vehicles, and heavy trucks.

It's built on three main modules: each with its own set of subjects and features.

The cornerstone of our innovative Workshop Data application.

This module contains extensive identification, repair, and maintenance information, all at your disposal.

  • Identification data,
  • Preventive maintenance,
  • Adjustment data,
  • Lubricants and fluids,
  • Repair manuals,
  • Recalls,
  • Repair times,
    Technical drawings.
 Download: automotive and truck Repair guide


Identification data


Identifying a vehicle is the critical first step in finding relevant pieces of information. The Tech module features extensive search methods* such as VRM, KBA, engine code, VIN, and type which help you select the correct vehicle. A three-step graphics-based vehicle selection is also available.


Subject Features
id_carIdentification data
  • VIN and identification plate locations
  • VIN decoder


Subject Features
id_truckIdentification data
  • VIN and identification plate locations
  • VIN decoder




Our maintenance section provides a clear overview of all the maintenance requirements set by vehicle manufacturers. Where necessary, there are links to technical drawings and additional information such as lubricant and adjustment data. A unique feature is the availability of logical follow-up tasks which make it easier to complete a worksheet.


Subject Features
  • Maintenance schedules (OEM-based)
  • Printable worksheets
  • Links to generic parts
  • Follow-up tasks
  • Additional tasks
  • Service times
  • Service indicator reset
  • Timing belt renewal intervals
  • Tyre pressure monitoring system


Subject Features
maintenance Maintenance
  • Maintenance schedules (OEM-based)
  • Smart links to adjustment data
  • Printable worksheets and cost estimates
  • Reset procedure for the Service indicator
  • Links to generic parts

Adjustment data


The adjustment data specifications which we provide range from torque settings to cylinder firing order, from idle speed to NOx emissions, and from cooling system cap pressure to rear brake disc thickness.


subject features
adjustment data 
Adjustment data
  • Ancillary drive belt,
  • Wheel alignment,
  • Emission data,
  • Tire sizes and pressures,
  • Torque settings,
  • Air-conditioning service connectors,
  • Capacities.


subject features
adjustment data Adjustment data
  • Emission data
  • Wear limits
  • Wheel alignment settings
  • Torque settings
  • Capacities

Lubricants and fluids


Again, all conceivable specifications are provided here, conveniently linked to related data for ease of use, and featuring technical illustrations showing the location of filler and drain plugs.

Cars | Truck

subject features
lubricants and fluids Lubricants and fluids
  • Qualities and viscosities

Repair manuals


  • Tech features detailed, step-by-step repair and service instructions for those tasks which, while being relatively routine, require specific procedures for the selected vehicle. Tech also provides technical illustrations and, where necessary, reference numbers identifying special tools. In this way, Tech helps boost productivity and improve workshop flow.


    subject features
    repair manual Repair manuals
    • Timing belt; removal/installation
    • Timing chain; removal/installation
    • Ancillary drive belt; removal/installation
    • Clutch: removal/installation
    • Manual transmission; removal/installation
    • Cooling system; drain/refill
    • Engine assembly; removal/installation


    subject features
    repair manual Repair manuals
    • Automatic transmission level and drain/refill
    • Tyre pressure monitoring system (TPMS)
    • Semi-automatic transmission level and drain/refill
    • Clutch: removal/installation
    • Valve clearances
    • Injector: removal/installation




Helping to ensure that the vehicle conforms to safety standards, HaynesPro Tech also features official OEM recall data.


subjects features
recalls Recalls
  • Safety-related recall actions issued by OEM
  • Link to fault codes and related cases


subjects features
recalls Recalls
  • Safety-related recall actions issued by OEM

Repair times


HaynesPro expands official repair times to take account of associated tasks, making its data more helpful and relevant in the real world. The module contains numerous included tasks for overlap calculation. By listing follow-up tasks we ensure that no labor times are overlooked. This helps to maximize workshop revenue.

Cars | Truck

subject features
repair times Repair times
  • Overlap technology
  • Standard labor times
  • Link to generic parts
  • Follow-up work



Technical drawings


A picture is worth a thousand words. HaynesPro has over 100,000 high-quality technical drawings in its database. These are bespoke illustrations with featured parts highlighted for ease of identification, and the option to link directly to a shopping cart in a parts catalog. Torque settings are indicated in the drawing to ensure that the correct torque is used for the specified bolt/nut.

Cars | Truck

subject features
tech drawings Technical Drawings
  • Links to generic parts
  • Torque settings

Truck and trailer configurator

As trucks are often used in combination with trailers, TruckSET also includes information on trailers and axles. This information, which is added on the basis of market feedback, allows mechanics to service truck–trailer combinations. TruckSET allows the user to build a custom truck or trailer from the various components stored in the database. The truck or trailer can subsequently be saved for future reference alongside all relevant data. Trucks and trailers are usually constructed from such a wide range of different components that sometimes the manufacturers (OEMs) themselves are unable to advise workshops about the exact parts used on a truck or trailer. The mechanic often needs additional information, such as dimensions, color, brand, and TruckSET’s ‘Parts Memo’ feature allows users to keep track of specific parts, together with their specifications and characteristics.


subjects features
truck config Truck and trailer configurator
  • Create your own truck/trailer configuration from scratch
  • Save truck and/or trailer configurations
  • Transmission database
  • Axle database



Assist technicians to identify, locate and resolve electrical system and component errors using intelligent data applications such as our step-by-step guided diagnostics.

  • Guided diagnostics,
  • Comfort Wiring Diagrams,
  • Fuses and Relays.


The guided diagnostic is an innovative electronics diagnostics application. It retrieves data from the vehicle’s CAN-Bus system to help technicians diagnose faults and component errors that have generated fault codes. Up to seven fault codes can be entered simultaneously. It then presents the technician with descriptions of the fault codes, together with a suggested list of components to test for the car and truck.

Subject Feature
vesa (Guided diagnostics)
  • Wiring diagrams for
    • engine management,
    • ABS/ESP,
    • and air conditioning,
  • Component locations and information,
  • Fault codes (manufacturer and EOBD),
  • Diagnostics wizard,
  • Ground point locations,
  • Links fault codes to the Smart Module,

Image screenshot vesa

Subject Feature
vesa(Guided diagnostics)
  • ABS/EBS,
  • Engine management,
  • ECAS (Electronically Controlled Air Suspension),
  • Diagnostic wizard,
  • Fault codes (manufacturers and EOBD).

Image screenshot vesa

Fuses and relays


Fuse boxes may be installed in various locations on a vehicle and finding them can be a challenge. Using the Fuses and Relays data in WorkshopData Electronics minimizes the time spent on searching.

Car | Truck

Subject Feature
fuses and relays Fuses and relays
  • Fuse and relay box locations
  • Fuse and relay overview


One of our goals is to help our customers reduce their unbillable hours. This means minimizing the time spent on searching for ground points, control units, or the EOBD connector location. HaynesPro’s electronic data speeds up this process by offering direct links to such locations.

  • EOBD connector location
  • Ground point locations
  • Control unit locations


Disconnecting/reconnecting a battery is becoming an increasingly complicated task on modern cars. A technician needs to know the correct procedures to follow after reconnecting a battery. This ensures that no customer will have to return their vehicle to the workshop because of subsequent errors in systems such as parking assistance. Due to the growing number of hybrid vehicles on the market, technicians also need specific instructions on how to work safely on these vehicles.

  • Battery disconnection/reconnection procedures
  • High-voltage circuit deactivation procedures


Electronics features an extensive list of possible warning lights, specific to each manufacturer, with a short description of the fault and required action.

  • Make-specific overview of available warning lights
  • Covering both the European and the US car park

Helps technicians reduce the time spent on fixing common faults.

It includes OEM Technical Service Bulletins (TSBs) and recalls.

  • Known fixes and tips,
  • Technical Service Bulletins,
  • Recalls,


Technical Service Bulletins 


WorkshopData offers instant access to a multitude of Technical Service Bulletins (TSBs) sourced from original equipment manufacturers (OEM). Our team of technical authors carefully adapts the TSBs we receive and orders them via symptom, cause, and solution.

Car | Truck | Motorcycle

Subject Features
SmartFIX Technical Service Bulletins™ (SmartFIX™)
  • Technical Service Bulletins
  • Link to fault codes and related cases

What makes GEM-FIX TSBs stand out?

OEM Data complies with the original OEM documentation (covering TSBs from 2008 onwards).
Single point access Single-point access to detailed information on faults, workarounds, and defects usually only known to vehicle manufacturers.
Links Links to industry-standard identification, providing an effective interface with other databases.
Smart Links Smart links to other data categories (specifications, procedures, references).
Reduce time Unnecessary time spent on known issues is reduced. Based on the available information, the workshop can decide whether to rectify the issue in-house or to refer the work to an approved dealer.
image icon search Accessible via a fault code search.
From HaynesPro solution 

Verified fixes and tips (SmartCASE™)


This feature extends HaynesPro’s coverage from OEM-based technical data to information sourced from industry experts and renowned helpdesk organizations. SmartCASE™ is a unique feature containing cases, with verified fixes and tips. It allows technicians to check quickly for solutions to common problems related to a selected vehicle that may or may not be linked to a fault code; thereby saving time and money. 

Car | Truck| Motorcycle

Subject Features
SmartCASE Verified fixes and tips (SmartCASE™)
  • Verified fixes and tips
  • Link to fault codes and related cases


YES GEM-FIX is integrated with other common repairs guide
gem fix labor guide integration


- Labor Guide,

- Preventative Maintenance,

- Repair Information,

- OEM Electrical diagrams,

- Fluid Specs,

- Technical bulletins OEM,

- And much more...