Best in 7 days
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Ships within 48 hours · Estimated delivery Sep 2 - Sep 7
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For Your Every Summer RSVP, with Code: SUMMER15
Description
GM 20-23 L5P Diesel Flashpaq F5The 2020 2022 L5P GM Duramax Flashpaq performance programmer (PN 2848 DS1) now includes hardware and software to UNLOCK YOUR ECM AND TCM AT HOME, and contains tunes engineered with the daily driver, heavy tower, and enthusiast in mind. Once the ECM TCM are unlocked with the included software and harnesses (a one time operation to the vehicle), our pre loaded tunes can be flashed into the truck to fine tune it for daily driving, towing, fuel mileage or
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- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.1 ★★★★★
Based on 1129 reviews
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Product Reviews
★★★★★ 4
Warm and Comfortable for Everyday Wear
Size: XX-Large, Color: Light Grey
This thermal set is really comfortable and does a good job keeping you warm in colder weather. The fleece lining is soft and cozy without feeling too heavy, and it works well as a base layer under regular clothes.
The fit is true to size with a nice amount of stretch, so it is easy to move around in and does not feel restrictive. It is also lightweight enough to wear throughout the day.
The only reason for 4 stars instead of 5 is that it could be a little thicker for extremely cold temperatures, but it still works well for most everyday use.
Overall, this is a solid and comfortable thermal set that is great for layering and staying warm. I would recommend it.
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Warm Thermals!
Size: Medium, Color: Black
Very comfortable and kept me warm in really cold conditions. Very soft and easy to wear.
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Reviewed in the United States on February 26, 2026
★★★★★ 5
Fit well
Size: Medium, Color: Black
Fit great and washed well
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Reviewed in the United States on March 2, 2026
★★★★★ 5
Buying more!
Size: Medium, Color: Black
Perfect fit and warmth.
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Reviewed in the United States on February 17, 2026
★★★★★ 5
Long Johns
Size: Small, Color: Navy
Great fit, nice and warm!
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Reviewed in the United States on February 3, 2026
