HGV Remapping

Professional ECU remapping service for HGVs (Heavy Goods Vehicles). Our expert technicians optimise your truck's engine management system to improve performance, fuel efficiency, and drivability.

Due to the bespoke nature of HGV remapping, pricing varies depending on vehicle make, model, engine type, and specific requirements.

📞 Please contact us directly for a quotation — this service is available by enquiry only.

HGV owners can use our handy Performance Gains Tool to look up the expected performance gains for their HGV before getting in touch.

Why Remap Your HGV?

Manufacturers deliberately restrict HGV engine output to account for varying global fuel quality standards, emissions regulations, and broad market requirements. A professional ECU remap from GDM Tuning unlocks your vehicle's true potential — tailored specifically to your truck, your load, and your routes.

Fuel Efficiency

• Typical fuel savings of 8–15% MPG improvement for HGVs, depending on load and driving conditions
• Optimised fuelling maps reduce unnecessary fuel consumption at motorway and dual-carriageway speeds
• Lower AdBlue consumption on compatible vehicles
• For high-mileage fleet operators, savings can run into thousands of pounds per vehicle, per year

Improved Power & Torque

• Increased torque output makes pulling heavy loads significantly easier
• Better low-end pulling power reduces the need to downshift on inclines
• Smoother, more linear power delivery reduces drivetrain stress
• Improved throttle response for safer, more confident overtaking

Reduced Engine Strain

• Optimised fuelling and timing reduces the engine working harder than necessary
• Less strain on the gearbox, clutch, and drivetrain components
• Cooler running temperatures under load in many cases
• Can extend the service life of key engine components when combined with regular maintenance

Better Drivability

• Eliminates flat spots and hesitation in the power band
• More responsive throttle makes the vehicle easier and less fatiguing to drive over long distances
• Improved gear change points due to better torque spread across the rev range

Fleet & Operator Benefits

• Reduced fuel costs across your fleet can deliver significant ROI within months
• Drivers report less fatigue on long hauls due to improved drivability
• Fully reversible on request — we can restore the original map at any time
• No hardware modifications required in most cases

Terms & Conditions — Please Read Before Enquiring

Elective Service & Limitation of Liability

ECU remapping is an elective modification chosen entirely at the customer's discretion. By enquiring about or purchasing this service, the customer acknowledges and agrees that:

• GDM Tuning accepts no responsibility whatsoever for any damage, failure, or deterioration of the vehicle, its engine, drivetrain, or any associated components arising from or connected to the remapping service.
• The customer proceeds entirely at their own risk.
• It is the customer's sole responsibility to ensure their vehicle is in a suitable condition to receive a remap prior to booking.
• GDM Tuning strongly recommends that the vehicle is serviced and mechanically sound before any remapping work is carried out.

Vehicle Condition

By proceeding with this service, the customer confirms and warrants that their vehicle is in a suitable mechanical condition for remapping. If, upon inspection at the appointment, the vehicle is found to have pre-existing faults or visible issues — including but not limited to boost pipe leaks, air leaks, fault codes, or other mechanical defects — GDM Tuning reserves the right to:

• Decline to carry out the remap; and
• Retain a £99.00 attendance and assessment fee to cover reasonable costs incurred. The remaining balance will be refunded to the customer.

Cancellation Policy

Cancellations must be made at least 24 hours before the scheduled appointment. Cancellations made with less than 24 hours' notice, or failure to attend without prior notification, will result in a 50% cancellation fee being charged. This charge covers the time and costs reserved for your appointment.

This cancellation policy is applied in accordance with the Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013. As this is a service booked for a specific time slot, the standard 14-day cooling-off period does not apply once the appointment has been confirmed and the service date is within that period.

Governing Law

These terms are governed by the laws of England and Wales. Any disputes shall be subject to the exclusive jurisdiction of the courts of England and Wales.

GDM Tuning recommends that customers seek independent legal or mechanical advice if they have any concerns prior to booking. These terms do not affect your statutory rights under UK consumer law.