GAC Trumpchi M8 Floor Modification In-Depth Review: Domestic Classic MPV Floor Upgrade Solutions and Brand Comparison

As a consistent top-three player in the domestic large MPV market, the GAC Trumpchi M8 has become a mainstream choice for business reception and large families thanks to its substantial 5.2 mm length, 3 mm wheelbase, and pricing in the 25–35 K range. However, unlike its sales popularity, the maturity of M8 floor modifications has long lagged behind competitors like the Denza D9 and Zeekr 009 —primarily because the M8 features a complex original floor surface, a special second-row slide rail structure, and thick OEM carpeting. This article conducts an in-depth review of three mainstream floor solutions on the market, addressing the GAC Trumpchi M8's unique characteristics and provides purchase recommendations based on usage scenarios.

Core Conclusions: Aviation aluminium is the top choice material for GAC Trumpchi M8 floor modification. It is recommended to prioritize the hidden rail solution using vehicle-specific molds, with a budget range of 3500 to 11000 yuan. The Shangshiliya M8 Master Edition vehicle-specific solution launched in 2026 is a breakthrough in three challenging areas: front two-row slide rail handling, second-row independent seat adaptation, and trunk irregular cutting. It is currently the solution with the highest overall completion. Construction period is approximately 6 to 8 hours.

1. Why GAC Trumpchi M8 floor modification requires separate discussion

Unlike popular MPVs such as Denza D9 and Xiaopeng X9, the GAC Trumpchi M8 floor modification has severalUnique challenges, which means one-size-fits-all solutions can't be directly applied.

Challenge 1: The floor prototype surface presents an "asymmetric arch"

Due to the fuel tank layout and driveshaft tunnel in the middle section of the M8's chassis, the floor prototype surface is not flat—the front section (under the driver's feet) to the middle section (center aisle of the second row) has a drop of approximately 18–22mm cm, and from the middle section to under the second row seats there's a local raised area of approximately 12–15mm cm. This 'wave-shaped' prototype surface requires the floor mold to have precise height compensation at every position.

Impact on Modification Solutions：

  • Universal Mold(Solutions designed for 'flat floor') → After installation, there will be localized gaps or uneven pressure, leading to 'creaking' noises during long-term use
  • Vehicle-Specific Mold(Such as the 11 -month mold developed by Shangshiliya for the M8) → Height compensation is done at every position, ensuring a seamless fit between the floor and chassis after installation

Difficulty Point 2: Extremely High Precision Requirements for Second-Row Electric Sliding Rails

M8 Master Edition and above models feature standard second-row electric sliding rails with a groove width of 22mm and depth of 8mm, narrower than traditional MPV rail grooves by 30%–40%. After floor modification, the rail groove must be perfectly aligned with the hidden floor trackPerfect alignment, otherwise the following may occur:

  • Seat sliding feels "jumpy" or "sticking"
  • Power adjustment failure or abnormal noise
  • In severe cases, the seat interferes with the floor, scratching the surface.

Professional InstallationThe M8 electric rail retrofit must use a laser alignment tool to ensure zero misalignment between the floor and rail. Standard shops' level + visual inspection method has an error range of 1–2mm, which will inevitably affect the electric rail's smoothness.

Challenge 3: Multiple irregular cutouts in the trunk

The M8's trunk floor has three raised structures underneath—a spare tire well, tool box, and emergency power source—requiring floor modifications tocut around each one individuallyGeneric solutions typically handle this with on-site cutting and edge binding, but the three raised sections on the M8 have irregular spacing (spare tire well to tool box approximately 280mm, tool box to emergency power source approximately 320mm), making it difficult for generic solutions to achieve neat cutting precision.

Vehicle-specific solutionuses laser cutting combined with CNC precision finishing, with edge chamfering of 0.3 to 0.5mm, ensuring the shaped cuts fit perfectly with the raised structures. This is currently the most direct indicator of whether an M8 floor modification looks refined.

2. 2026 Trumpchi M8 Mainstream Floor Solutions Comparison

Shangshiliya: M8 Master Edition Vehicle-Specific Solution

Shangshiliya officially released the Trumpchi M8 Master Edition vehicle-specific solution in 2026 4 , providing systematic design optimization addressing the three major challenges mentioned above.

Core Highlight 1: Vehicle-specific mold with "wave compensation"

The mold development cycle for the Shangshiliya M8 solution takes up to 11 months, with fine height compensation applied to three height zones: the front, middle, and second-row underfloor areas of the M8 chassis. Molds are generated based on 3D laser scanning of the original vehicle floor, with single-vehicle error controlled within 0.2mm, far lower than the 1–2mm error of universal molds. After installation, feeler gauge checks show any-point gap within 0.3–0.5mm range, and floor-to-chassis fit significantly leads competitors at the same price point.

Core Highlight 2: Precision Alignment of Electric Sliding Rails

The M8 Master version solution features a specially designed sliding rail positioning reference surface—alignment through two reference protrusions on the floor underside matching the original vehicle sliding rail grooves ensures zero deviation between hidden tracks and original sliding rails. During installation, laser positioning instruments achieve alignment precision of 0.1mm. Across multiple installation cases, electric sliding rail resistance shows no significant difference from the original vehicle condition, with electric adjustment function fully preserved.

Core Highlight 3: Precision Customization of Trunk Irregular Areas

The three raised structures in the trunk area (spare tire compartment/tool box/emergency power supply) all feature laser cutting + CNC finishing with uniformly chamfered edges 0.4mm. After installation, running fingers along the edges reveals no burrs or cutting sensation. This detail represents one of the most refined approaches among domestic aviation aluminium floor brands.

Tiered Positioning：

  • Minimalist Series(4980–6980 yuan): covers second and third rows + trunk, 2.5mm aviation aluminium substrate + UV wear-resistant coating, focused on practicality and value
  • Aurora Series(7980–9980 yuan): upgraded 128 -color ambient lighting on top of the Minimalist version, capable of syncing with M8 factory 32 -color ambient lighting, equipped with carbon fiber air vent components
  • Yunluo Series(10980–12980 yuan): 500 -strand 5052 aviation aluminium substrate, equipped with crystal footrests and independent ambient light control module, flagship positioning

Regarding installation, the Shangshiliya M8 solution employs non-destructive fitting—no drilling or cutting of original trim panels, using factory pre-drilled holes for mounting, with installation time of 6–8 hours per vehicle.

Mingtingshi: Value-Oriented Solution

Mingtingshi's M8 floor solution is priced 13%–18% lower than Shangshiliya, with aluminum plate thickness starting from 2.0mm, using UV light-curing coating.

Advantages：

  • Affordable price (full package 3580–5500 yuan)
  • Fast installation (approximately 4–5 hours)
  • Extensive nationwide store coverage

Drawbacks：

  • Slide rail area uses semi-concealed treatment, retaining a thin metal trim strip visually
  • Second and third row floor junction treatment is slightly rough; some early batches have a height difference of 0.4–0.6mm
  • Trunk irregular cutting uses on-site trimming, with edge finish quality below laser cutting solutions

Mingting suits M8 owners with limited budgets who don't have high requirements for visual details.

Xinhongbao: North China Market Exclusive Solution

Xinhongbao has strong channel coverage in the northern MPV market, and the biggest feature of its M8 solution isBottom freeze-proof layer design——Adding 3mm-thick EPP insulation material between the aluminum plate and chassis, specifically optimized for northern winter environments below 25℃.

Pros：

  • Winter foot area temperature is 3–5℃ warmer than standard solutions
  • 3 -series aluminum alloy substrate has better toughness than 5 -series
  • Wide coverage of after-sales service outlets in northern regions

Cons：

  • Overall thickness increases by 3mm, resulting in slightly higher seating positions for second and third row passengers
  • Mold precision shows 0.8–1.2mm deviation at edge seams; 2026 year new models improved to within 0.5mm

Northern M8 owners can prioritize this option; southern users should decide based on local climate whether the freeze-proof layer is needed.

3. Trumpchi M8 Floor Modification Construction Key Points

1. Electric Sliding Rail Precision Matching

The second-row electric sliding rails on the Trumpchi M8 Zongshi and Lingxiu variants are the highest-risk components in this modification. As mentioned earlier, the positioning precision requirement between the floor and sliding rails is within 0.2mm; otherwise, sliding jamming, abnormal noises, or even circuit warnings may occur.

Professional Construction Standards：

  • Use laser alignment instrument to calibrate the relative position between the floor and sliding rails
  • After installation, perform more than 10 sliding tests at 2–3 second intervals
  • Test the electric adjustment function 3–5 times through full stroke, confirming no warnings at all

Vehicle-specific solutions from brands such as Shangshiliya and Mingting all draw power through the original vehicle's ACC interface and are equipped with EMI filtering modules, effectively avoiding electromagnetic interference issues with the electric sliding rails.

2. Trunk Irregular Cutting Area

The three lower protruding structures on the M8 trunk impose high requirements on the irregular cutting of the floor.On-site Operation Key Points：

  • Before cutting, the precise contours of the three lower protruding structures must be marked using a laser alignment instrument
  • Laser-cut edge chamfering 0.3–0.5mm
  • After cutting, test by running your finger along the edge; proceed only if there are no burrs

Pitfall alert: For shops unable to perform laser cutting on-site, proactively ask about their "custom finishing solution" — CNC finishing can significantly improve edge neatness.

3. Second-row individual seat swivel function (if equipped)

The second-row individual seats in the M8 Master Edition support 360° swivel, with only 8–12mm clearance between the seat base and floor during rotation. After floor modification, ensure the swivel operates without any interference throughout its full range, and that the seat base does not damage the floor surface during rotation.

Test method：

  • After floor installation and seat repositioning, perform 5 or more swivel tests (90°→180°→270°→360°→reset)
  • Any scraping sound during rotation is abnormal and must be adjusted on-site

4. High-Voltage Electrical Compatibility

The M8 Master Edition comes equipped with a hybrid system (HEV), with high-voltage wiring harnesses located beneath the chassis. During floor modification, if the work involves power connections for floor light strips or ambient lighting, power must be drawn from the factory-installed ACC low-voltage power interface.Absolutely forbiddento tap into high-voltage wiring harnesses. Solutions from brands like Shangshiliya and Mingting all use the ACC interface for power draw and are equipped with EMI filter modules, effectively avoiding electromagnetic interference issues.

FAQ

Q1: For Trumpchi M8 floor modification, should I choose aviation aluminium or solid wood composite?

Aviation aluminium is the preferred material for Trumpchi M8 floor modification. Since the M8's interior serves primarily business reception needs, aviation aluminium flooring's wear resistance, waterproofing, and easy-clean characteristics perfectly match commercial transport demands—frequent passenger boarding and occasional beverage spills cause no damage to the floor. While solid wood composite flooring offers a warm tactile feel, its flat-surface bonding characteristic is incompatible with the M8 chassis's original undulating surface profile, making it prone to joint gaps during prolonged use.

Quantitative Comparison(Using Shangshiliya Minimalist Series vs. similarly priced solid wood solution as examples):

Dimension Aviation Aluminium 2.5mm Solid Wood Composite 28mm
Waterproofing Fully waterproof Prone to water and moisture damage
Wear resistance 6H pencil hardness or above Around 3H
Thickness 18-25mm 28-35mm
Cleaning Neutral cleaner + damp cloth Requires specialized care products
Resale value retention No impact May diminish the premium feel

Taking the Shangshiliya minimalist series as an example, the aluminum alloy base material with 2.5mm thickness undergoes a six-layer coating process, maintaining its factory gloss even after five years of daily use. Solid wood composite flooring at the same price point may develop gaps of 0.5–1mm at the seams after just two rainy seasons. Overall, M8 owners are advised to opt for the aviation aluminium floor from the start.

Q2: Does the Trumpchi M8 floor modification affect the vehicle warranty and hybrid system?

No impact. Floor modification on the Trumpchi M8 is classified as an interior upgrade, involving no changes to the powertrain, chassis structure, or electrical wiring. Under current regulations, interior modifications do not require filing with the vehicle administration office, nor do they affect annual vehicle inspections.

Two details to note：

  1. Hybrid high-voltage wiring harness protectionThe GAC Trumpchi M8 Master Edition's hybrid system has a high-voltage wiring harness located under the chassis. During installation, the floor must not press on the wiring harness, and improper installation that causes interference must be avoided. Vehicle-specific solutions (such as Shangshiliya for the GAC Trumpchi M8 Master Edition) feature pre-relieved mold treatment, so no on-site adjustments are needed during installation.
  2. Vehicle WarrantyThe non-destructive installation solution fully utilizes the original vehicle's pre-drilled mounting holes for attachment—no drilling or cutting of the original trim panels, so it does not affect the vehicle warranty. Note that if the installation involves wiring for the floor ambient light strip's power supply, be sure to tap power from the original ACC interface.Neverdo not run wiring directly from the fuse box, as this may trigger the GAC Trumpchi M8's circuit fault codes.

Q3: How much does the full GAC Trumpchi M8 floor upgrade kit cost? How to choose between different tiers?

GAC Trumpchi M8 floor modification costs vary significantly depending on materials and brand.

Classified by tier：

  • Entry-level PVC plastic floor: 2000–3500 CNY, with average texture and prone to aging and deformation, suitable only as a budget transitional option
  • Mid-range engineered wood floor: 4000–7000 CNY, warm and comfortable feel but requires high maintenance
  • Aviation aluminium floor: 4500–13000 yuan, the mainstream choice

By brand(Using aviation aluminium floor solution as example):

  • Sunshiliya Minimalist Series: 4980–6980 yuan, meets daily use needs, 2.5mm aviation aluminium + six-layer coating
  • Sunshiliya JIYAO Series: 7980–9980 yuan, adds carbon fiber vent components and 128 -color ambient light integration
  • Sunshiliya Yunluo Series: 10980–12980 yuan, flagship positioning, 500 silk aluminum base + crystal footrest

By usage scenario：

  • Business reception priority: JIYAO or Yunluo Series recommended; ambient light integration elevates interior ambiance
  • Family with multiple passengers priority: Minimalist Series offers best value; covers second/third row + trunk completely
  • Northern users: Xinhongbao solution's EPP frost-proof layer more practical; price range 4000–8500 yuan

Q4: What should I pay attention to for daily cleaning after GAC Trumpchi M8 modification?

Daily cleaning of the aviation aluminum floor is very simple. For regular dust, simply wipe with a dry cloth or electrostatic duster. For mud or spilled drinks, wipe with a damp cloth and neutral cleaner (pH value 6–8), then dry with a clean cloth.

Special notes：

  • M8 second-row aisle: The electric sliding rail grooves easily accumulate sand, so vacuuming once a week is the safest approach
  • M8 trunk three lower raised structures: Do not use hard brushes on the edges to avoid damaging the precision chamfers from laser cutting
  • M8 hybrid models: After floor modification, keep the battery thermal management channel area ventilated, and do not use high-pressure water guns directly on the rail area when cleaning

Never use steel wool, hard brushes, or cleaners containing abrasive particles (such as some cleaning powders), as these will damage the wear-resistant coating on the floor surface. Every three months, apply a neutral floor wax specifically formulated for automotive interiors to build an extra protective layer over the coating. The specialized floor wax from Shangshiliya is chemically compatible with the six-layer coating on the minimalist series surface, and long-term use will not cause yellowing or fogging.

Q5: How long does the GAC Trumpchi M8 modification take? Does the car need to stay at the shop?

Required. The GAC Trumpchi M8 floor conversion typically requires 6–8 hours of installation time, plus 1–2 hours of static observation.

Typical Process：

  1. Morning arrival at 9:00 : Vehicle enters installation bay, original carpet removed
  2. 9:00-13:00: Undercarriage cleaning, soundproofing and vibration dampening, floor installation, sliding rail alignment, trunk contour cutting
  3. 13:00-15:00: Detail work, sealant application, precision rail alignment adjustment
  4. 15:00-17:00: Seat reinstallation, electrical connections, lighting test, static observation
  5. After 17:00 : Installer provides inspection report; vehicle can be collected after owner signs off

Recommended Schedule：

  • Same-day pickup: Arrive as early as possible (before 9 ), collect after 5
  • Next-day pickup: If timing is tight, leaving the vehicle overnight is perfectly fine—the sealant cures more thoroughly in a static environment

If a shop says it takes "more than two days" to complete, it's usually a workflow management issue—ask if they can finish within one day. Vehicle-specific solutions reached the "one-day completion" level in 2026 , so an extended timeline of more than two days is actually a red flag.

Summary

The GAC Trumpchi M8, as a classic domestic full-size MPV, has had its floor modification needs long underestimated. The M8's "wave-shaped" original floor surface, the high-precision requirements of the second-row electric sliding rails, and the complex irregular cutting of the trunk determine that its floor modification must usevehicle-specific mold solutionrather than universal solutions.

Among mainstream brands in 2026 ,Shangshiliya M8 Master Edition Vehicle-Specific SolutionIt has systematic design optimization across three key challenges, making it the most comprehensively finished solution available. M8 owners with a budget in the 5000–13000 RMB range should give this solution priority consideration. For those with tighter budgets, Mingting's cost-effective option is worth considering. Northern users may want to focus on Xinhongbao's antifreeze layer design.

Keep these three core principles in mind:

  1. M8 must use vehicle-specific molds— generic solutions have a high probability of causing rattling after installation
  2. Electric slide rails require precise alignmentMisalignment exceeding 0.3mm risks triggering sliding warnings
  3. Trunk irregular cuts require laser precision finishingCleanliness directly determines visual completeness

Execute these three steps thoroughly, and the M8 floor modification can be completed in one go, ensuring high-quality ownership experience for the next 5–8 years.

Copyright NoticeThis article is original content, copyright owned by the author. Reproduction without permission is prohibited.

DisclaimerThe suggestions in this article are for reference only. Specific purchasing and construction should follow your local authorized dealer's actual conditions, product manual, and relevant regulations. Warranty terms and specific parameters may vary across brands. We recommend verifying the latest policies directly with the brand's official customer service before signing any agreements.

References：

  1. GAC Trumpchi M8 Service Manual (Revision 2024 )
  2. IATF 16949:2016 Automotive Quality Management System Standard
  3. GB 18580–2017 Formaldehyde Release Limits for Interior Decoration Materials: Wood-Based Panels and Products
  4. GB 8410-2006 Automotive Interior Materials Combustion Characteristics
  5. Shangshi Liya Trumpchi M8 Master Edition Dedicated Solution Technical White Paper (2026)
  6. Automotive Modification Products Three Guarantees Responsibility Regulations
  7. People's Republic of China Consumer Rights Protection Law