GMC Diesel Tuning
The 6.6 Duramax V8 diesel in the Sierra makes 445hp and 1234Nm as standard. Our Remap Calculator shows a typical 500hp and 1350Nm at Stage 1, which is the difference you notice with a heavy trailer behind you.
GMC Remapping Service
A GMC that tows a horsebox or a boat trailer earns its keep on torque, and a custom remap gives you more of it lower in the rev range. Every map is written in-house for your engine, and the truck goes on our dyno before and after.
Additional powerImproved driveabilitySharper throttle responseBetter fuel economy
Remap Calculator
See what your GMC makes now and after a remap, then book it in.
- All work carried out by a qualified motorsport engineer
No figures are available for this engine yet.
Stage 1, standard to remapped
What a Stage 1 remap does for popular GMCs
GMC Sierra 5.3 V82017 onwards · Petrol
Power: 355 hp standard, 375 hp at Stage 1, 20 hp more.
Torque: 519 Nm standard, 540 Nm at Stage 1, 21 Nm more.
GMC Acadia 3.6 V62017 onwards · Petrol
Power: 310 hp standard, 330 hp at Stage 1, 20 hp more.
Torque: 367 Nm standard, 390 Nm at Stage 1, 23 Nm more.
GMC Canyon 2.8 Duramax2016 onwards · Diesel
Power: 181 hp standard, 210 hp at Stage 1, 29 hp more.
Torque: 500 Nm standard, 540 Nm at Stage 1, 40 Nm more.
GMC Envoy 5.3 V82002 to 2010 · Petrol
Power: 290 hp standard, 310 hp at Stage 1, 20 hp more.
Torque: 441 Nm standard, 460 Nm at Stage 1, 19 Nm more.
GMC Safari 4.3i2001 to 2005 · Petrol
Power: 190 hp standard, 210 hp at Stage 1, 20 hp more.
Torque: 339 Nm standard, 360 Nm at Stage 1, 21 Nm more.
GMC Savana 4.8 V82003 onwards · Petrol
Power: 275 hp standard, 295 hp at Stage 1, 20 hp more.
Torque: 393 Nm standard, 415 Nm at Stage 1, 22 Nm more.
Figures from our Remap Calculator. Your own car is measured on our 4WD dyno on the day.
Why Remap Your GMC?
A GMC is a big, willing truck, but with a load behind it even a V8 can feel lazy up a long hill. Our SUV and 4x4 remapping sharpens throttle response and fills in the mid-range, and the big automatic gearboxes these trucks use can be set up to hold gears better under load with TCU remapping.
GMC Petrol Engine Tuning
The 5.3 and 6.2 V8 petrols gain less in numbers but a lot in feel: the 6.2 V8 goes from 420hp and 609Nm to a typical 440hp and 630Nm. Both sets of figures are typical for a truck in good health, and an import with a long history gets checked over first. If you want the V8 to sound the part as well, we also fit custom exhausts.
Look up your GMC in the calculator above, or call us on 087 744 2633 if you'd like to talk about towing first.
Benefits of ECU Remapping
Remapping your GMC with JTK Remapping Ireland has several benefits, including:
- ✅ Unlocking Hidden Power
- ✅ Better Fuel Economy & MPG
- ✅ Up to a 35% increase in BHP on a Stage 1 Remap
- ✅ Up to 50% more torque
- ✅ Up to 20% better fuel economy
- ✅ Better throttle response
- ✅ Safer overtaking & acceleration
- ✅ Lifetime software warranty
- ✅ EGR & DPF solutions available
- ✅ DSG/TCU tuning
- ✅ Car, 4X4, commercial, truck & tractor ECU remapping
- ✅ Vehicle & mobile diagnostics
At our workshop in Dungarvan
What happens on the day
Check your GMC in the Remap Calculator or give us a call, then book it in. On the day it goes on our 4WD dyno for a before run, the map is written for your engine, and an after run shows you the difference in power and torque.
If your GMC is an automatic, ask us about a gearbox (TCU) remap on the same visit.
Trusted by thousands of customers
Perfect experience from start to finish. Very easily dealt with. Got my mk7 golf r remapped difference is like night and day. Can’t thank the team enough
Pa P.
Great service, really happy with the remap and downpipe. Car feels brilliant now - highly recommend!
Cian W.
So I got a hybrid turbo from muchboost installed in my Mercedes c220 and was advised to get a custom remap on a dyno so I contacted John got it booked in and he also offered hydro clean as an option and It was worth every penny I couldn’t believe the difference it made plenty of power and ticking over like a dream thanks again
Keith T.
GMC models we remap
We remap the full GMC range, including:
- Acadia
- Canyon
- Envoy
- Safari
- Savana
- Sierra
- Sonoma
- Terrain
- Yukon
GMC remap questions
Book Your RemapWhat will my GMC make after a remap?
Pick your model, year and engine in the Remap Calculator for the standard and remapped figures. On the day, the dyno shows what your own car makes before and after.
Can you remap the gearbox on an automatic GMC?
Yes. Ask us about a gearbox (TCU) remap on the same visit, for quicker shifts and room for the extra torque.
How do I book my GMC in?
Check it in the Remap Calculator above and press Book Your Remap, or ring us on 087 744 2633.
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