What are the opening hours?

Monday 8am - 6pm Tuesday 8am - 6pm Wednesday 8am - 6pm Thursday 8am - 6pm Friday 8am - 6pm Saturday 9am - 1pm

GSL Tuning and Remapping

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Castle Douglas
GSL Tuning and Remapping

Fully Mobile Remapping Specialist and file provider. Advanced solution development. Topdon Official Seller. Meta Trak approved installer. Fully mobile service.
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Fueltone pro supplier and outlet. Fully insured, fully licensed, using genuine tools and equipments only.

21/05/2026

** NOTICE **

Tomorrow - Friday 22nd - we are attending a wedding so as of mid morning the phone will likely be off or at least unmanned.

We will be spending the day celebrating with our friends at Tapass design and print (Ang and Josh) as they tie the knott!

Thank you all - service as normal on Monday 💪

18/05/2026

Just a quick one.

We are very busy just now, the phone started ringing at 6.30am and hasn’t stopped yet.

Im trying to get everyone sorted and booked in but it is genuinely a struggle keeping everyone happy. Bare with me, I’m not ignoring anyone it’s just hard to get through the workload with a phone stuck to your ear.

Feel free to leave a message, text or WhatsApp and I will make my way through them.

As always, everyone will be booked in as soon as humanly possible! Everyone is desperate and every job is equally important to us.

Happy Monday 😇

12/05/2026

Last post was fun, let try this!

What car sticks in your mind as the one that made you a petrolhead?!

Mine - Ford RS200, still now it’s my dream car!

Post yours

07/05/2026

Tag that friend that LOVES CARS

BUT

Drives around in a S**T BOX car!

Best S**T BOX will win a prize if the judges see fit…. You lot are the judges!

Like - tag - share

Comments on the original post so we can see them.

07/04/2026

Big skidzzzzz at Driftland last weekend!

Matt, who we also support with his Autotest buggy, tried his hand at drifting for the first time and it looks like he’s done amazing!

✅ 2.8 engine conversion in this BMW compact can certainly peel the tyres!

✅ BMW factory ECU de-immobilised and Tuned carefully to give as much mid to high range output as possible as well as the RPM limiter raised.

✅ Car retuned home with 4 corners in tact!

Success? We think so!

30/03/2026

Another big development in the remapping world!

The MD1CS003 has been a pain for years! Anything from late 2021 onwards was a no-go…. Until now!

Same day solutions coming soon!

Get in touch with your requirements

Compatibility List*:
🚗 Citroen Models: Berlingo (2018) / C3 (2017 – 2020) / C3 Aircross (2017 – 2021) / C4 (2020) / C4 Cactus (2017) / C4 Space Tourer (2018) / C5 Aircross (2018) / DS3 Crossback (2019) / DS7 Crossback (2017) / Jumpy (2016)
🔧 Citroen Engine: 1.5 BlueHDI

🚗 DS Model: DS7 Crossback (2017)
🔧 DS Engine: 1.5 BlueHDI

🚗 Fiat Model: Scudo (2022)
🔧 Fiat Engine: 1.5 Multijet

🚗 Opel Models: Astra (2019) / Combo (2020) / Corsa (2019) / Crossland X (2017) / Grandland X (2017) / Insignia Grand Sport (2020) / Mokka (2020) / Vivaro (2019) / Zafira Life (2020)
🔧 Opel Engines: 1.5 Turbo D / 1.5 Ecotec D

🚗 Peugeot Models: 2008 (2013 – 2019) / 208 (2019) / 3008 (2016 – 2020) / 308 (2017 – 2021) / 5008 (2017 – 2020) / 508 (2018) / Expert / Traveller (2016) / Partner (2018) / Rifter (2018)
🔧 Peugeot Engine: 1.5 BlueHDI

🚗 Toyota Models: ProAce (2020) / ProAce City (2020)
🔧 Toyota Engines: 1.5 D-4D / 1.5 diesel

🚗 Vauxhall Models: Astra (2019) / Combo (2018) / Corsa (2019) / Crossland (2017) / Grandland X (2017) / Insignia (2020) / Mokka (2020) / Vivaro (2019) / Zafira (2019)
🔧 Vauxhall Engines: 1.5 Turbo D / 1.5 Ecotec D

13/03/2026

⭐️⭐️ BIGGEST NEWS OF THE YEAR! ⭐️⭐️

Transit & Ranger 2.0 diesels with the dreaded SID212 & SID212 EVO can now be unlocked on site!

Two companies have only this week released FULL unlocks ready for tuning WITHOUT sending the ECU away!

✅ TRIED
✅ TESTED
✅ TRUSTED

The better news is GSL have both these tools 🫡

Get in touch to book yours in!

07944910872

01/03/2026

Back to the grind tomorrow!

I’ve tried to reply to as many people as possible but if I’ve missed you please give me a call tomorrow 🫡

Here’s an AI image… I needed AI to make me look this happy 😂

19/02/2026

Just a heads up to all our stranraer / Dumfries clients.

Next Thursday and Friday (26th & 27th) we will be CLOSED! Taking a few days off to get away for a much needed break.

Open Monday 2nd as usual

19/12/2025

2025 DIARY FULL!

Increasing amounts of calls and messages wanting jobs done “today” and “before Xmas”

Anything desperate that we can facilitate from now until January 5th will be breakdowns only and will incur a call out charge and travel.

Thank you

25/11/2025

Well… ONE MONTH TILL CHRISTMAS!

At this time of year GSL like to give something back!

Watch the page for your chance to WIN AMAZING PRIZES and 100% of proceeds will of course go to worthy charities!

Also, if any of our trade customers would like to donate or sponsor a give away please get in touch!

Address

Castle Douglas

Opening Hours

Monday	8am - 6pm
Tuesday	8am - 6pm
Wednesday	8am - 6pm
Thursday	8am - 6pm
Friday	8am - 6pm
Saturday	9am - 1pm

Telephone

+447944910872

Website

https://www.gslmobile.co.uk/

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