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Stock Number: 82172
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Monday, July 27, 2026 08:05 AM
Location: Greencastle, Pennsylvania
Seller: Green Castle - Camper Liquidators
Stock Number: VJ055600
Exterior Length: 38 ft 10 in
Sleeps: 6
Number of Slide Outs: 3
Condition: New
Exterior Width: 8 in
Description: FOREST RIVER SIERRA 3990FL FRONT LIVIING WITH A LOFT FLOORPLAN SPECIFICATIONS Hitch Weight:2,825 lb.GVWR:15,375 lb.UVW12,439 lb.CCC2,936 lb.Exter...
Updated: Saturday, August 01, 2026 12:09 AM
Location: Sweetwater, Texas
Seller: Family RV Center - Sweetwater
Stock Number: 219669
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Friday, July 31, 2026 10:44 AM
Location: Conroe, Texas
Seller: Fun Town RV-Conroe
Stock Number: 348072
Exterior Length: 3 ft 7 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Width: 8 in
Description: NEW 2026 FOREST RIVER SIERRA 3990FL – 348072
**Forest River Sierra fifth wheel 3990FL highlights:**
- King Bed
- Front Living Area
- Tw...
Updated: Thursday, July 16, 2026 08:30 AM
Location: Mesa, Arizona
Seller: General RV Colorado
Stock Number: N055336
Exterior Length: 43 ft 6 in
Condition: New
Exterior Color: WHITE
VIN: 4X4FSES28TJ055336
Description: Sales_pitch: The RV for sale is a New 2026 Sierra Fifth Wheel by Forest River RV that and much more. This Sierra 3990fl Fifth Wheel we...
Updated: Saturday, August 01, 2026 08:01 AM
Location: Ponchatoula, Louisiana
Seller: Berryland Campers - Ponchatoula
Stock Number: 93398
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: King Bed Front Living Area Two Tri-Fold Hide-A...
Updated: Friday, July 31, 2026 10:39 AM
Location: San Antonio, Texas
Seller: Ron Hoover RV & Marine - San Antonio
Stock Number: 87678
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: King Bed Front Living Area Two Tri-Fold Hide-A...
Updated: Friday, July 31, 2026 10:39 AM
Location: Texarkana, Texas
Seller: Ron Hoover RV & Marine - Texarkana
Stock Number: 87679
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: King Bed Front Living Area Two Tri-Fold Hide-A...
Updated: Friday, July 31, 2026 10:39 AM
Location: Georgetown, Texas
Seller: Ron Hoover RV & Marine - Georgetown
Stock Number: 220885
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Friday, July 31, 2026 06:01 PM
Location: Anna, Illinois
Seller: Fun Town RV-Cleburne
Stock Number: 219670
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Friday, July 31, 2026 10:44 AM
Location: Rockwall, Texas
Seller: Fun Town RV-Cleburne
Stock Number: 82216
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Monday, July 27, 2026 08:05 AM
Location: Greencastle, Pennsylvania
Seller: Green Castle - Camper Liquidators
Stock Number: HL6081
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: King Bed Front Living Area Two Tri-Fold Hide-A...
Updated: Wednesday, July 15, 2026 03:13 AM
Location: Andover, Minnesota
Seller: North Country RV
Stock Number: 217297
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Friday, July 31, 2026 06:02 PM
Location: Jackson, Michigan
Seller: Fun Town RV - Jackson
Stock Number: 054029F
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: White
Description: New 2025 Forest River RV Sierra 3990FL
Details: NO HIDDEN FEES!!! WE DO NOT CHARGE PDI OR FREIGHT FEES!!! LET US HELP YOU SAVE MONEY!!! Forest ...
Updated: Thursday, July 30, 2026 11:52 AM
Location: Bryan, Texas
Seller: T&S RV & Sport - Bryan
Stock Number: 81646
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2025 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower ...
Updated: Friday, July 17, 2026 10:42 AM
Location: Chesapeake, Virginia
Seller: Camper Liquidators-Chesapeake
Stock Number: DG1505
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2025 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Sunday, July 19, 2026 06:00 AM
Location: Sussex Corner, New Brunswick, Canada
Seller: LDG - Doug's Recreation
