2026 Grand Design Lineage TSBs
9 Technical Service Bulletins across 4 categories
Categories
Electrical
4 bulletinsThis bulletin describes the procedure to install the Compressor Power Relay Upgrade on affected Lineage units.
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The upgrade routes the A/C compressor positive power feed through a dedicated 120-amp relay, removing the compressor load from the control board. The upgrade is supplied as SDG kit 5000041 (GDRV PN 710676). GDRV has updated the scope and instructions on this campaign.
This bulletin describes the procedure to install the Compressor Power Relay Upgrade on affected Lineage units.
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The upgrade routes the A/C compressor positive power feed through a dedicated 120-amp relay, removing the compressor load from the control board. The upgrade is supplied as SDG kit 5000041 (GDRV PN 710676).
This bulletin describes the procedure to connect the 12-volt side of the water heater using harness EL-2031 (410536) on...
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affected Lineage units.
This bulletin describes the procedure to relocate the LP solenoid power source from the chassis battery to the house...
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battery on Lineage M-Series 25FW units equipped with an LP solenoid. The relocation uses retrofit harness EL-0189.
Other
3 bulletinsAC may not cool efficiently.
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Process walks dealer through how to install a direct dump feature to the AC system and add insulation in the front cab area.
This bulletin describes the procedure to replace the plastic threaded pivot fitting on the rain shower head with a metal...
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threaded pivot fitting on affected Lineage LVT1 units. The metal fitting addresses a failure of the plastic threaded pivot fitting as supplied by the shower head manufacturer.
This bulletin describes the procedure to replace the plastic threaded pivot fitting on the rain shower head with a metal...
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threaded pivot fitting on affected Lineage LVT1 units. The metal fitting addresses a failure of the plastic threaded pivot fitting as supplied by the shower head manufacturer.
Engine
1 bulletinn response to concerns the entry steps may unexpectedly deploy on the Grand Design Lineage Class C motorhomes GDRV has issued a service bulletin.
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Bulletin covers 2025-2026 Lineage Class C Motorhomes built with a sensor switch. The switch will be changed to a magnet to ensure better ability to maintain continuity during travel.
Body & Paint
1 bulletinRelates to concerns that the slide may not fully retract at the bottom, causing water intrusion.
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25FW Lineage models built between 5/6/24 - 7/25/25 are potentially affected.