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Condition: New
Exterior Length: 13.31 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 7,459.33 kg
Number of Axles: Tandem
Description: New 2027 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, October 23, 2026 01:03 am
Location: Odessa, Texas, USA
Seller: Ron Hoover RV & Marine - Odessa
Condition: New
Stock Number: A6188
VIN: 4X4FSES28VJ055582
Description: New 2027 Forest River RV Sierra 3990FL
Details: Call for details.
Updated: Friday, October 23, 2026 11:09 am
Location: Appleton, Wisconsin, USA
Seller: Markquart RV - Appleton
Condition: New
Exterior Length: 1.09 m
Sleeps: 8
Number of Slide Outs: 5
Fresh Water Tank Capacity: 189.27 L
Stock Number: 348072
Description: NEW 2026 FOREST RIVER SIERRA 3990FL – 348072
**Forest River Sierra fifth wheel 3990FL highlights:**
- King Bed
- Front Living Area
- Tw...
Updated: Monday, September 28, 2026 04:06 pm
Location: Mesa, Arizona, USA
Seller: General RV Center
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Wednesday, October 14, 2026 08:57 am
Location: Conroe, Texas, USA
Seller: Fun Town RV-Conroe
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Friday, October 23, 2026 01:04 am
Location: San Antonio, Texas, USA
Seller: Ron Hoover RV & Marine - San Antonio
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Friday, October 23, 2026 01:05 am
Location: Texarkana, Texas, USA
Seller: Ron Hoover RV & Marine - Texarkana
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Friday, October 23, 2026 01:03 am
Location: Georgetown, Texas, USA
Seller: Ron Hoover RV & Marine - Georgetown
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Friday, October 23, 2026 11:09 am
Location: Andover, Minnesota, USA
Seller: North Country RV
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Wednesday, October 14, 2026 08:57 am
Location: Anna, Illinois, USA
Seller: Fun Town RV-Cleburne
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Tuesday, October 20, 2026 03:46 am
Location: Greencastle, Pennsylvania, USA
Seller: Green Castle - Camper Liquidators
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Tuesday, September 01, 2026 09:57 am
Location: Chesapeake, Virginia, USA
Seller: Camper Liquidators-Chesapeake
Condition: New
Stock Number: T89498
VIN: 4X4FSES26SJ053986
Description: AI Generated Description Forest River Sierra 3990FL stands out with five slideouts and a generous 522 inches of body length, creating expansive int...
Updated: Friday, October 23, 2026 11:02 am
Location: Claremore, Oklahoma, USA
Seller: Ron Hoover RV & Marine - Tulsa
Condition: New
Exterior Length: 13.26 m
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 6,973.98 kg
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: Friday, October 23, 2026 11:02 am
Location: Claremore, Oklahoma, USA
Seller: Ron Hoover RV & Marine - Tulsa