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Condition: New
Exterior Length: 43 ft 11 in
Number of Slide Outs: 3
Stock Number: FSI204
VIN: 4X4FSER22VJ055597
Description: 2027 Forest River Sierra 3900HBLR 2027 Forest River Sierra 3900HBLR is built for families and luxury travelers seeking a spacious fifth-wheel with ...
Updated: Wednesday, October 21, 2026 10:54 AM
Seller: Giant RV-Montclair
Condition: New
Exterior Length: 43 ft 11 in
Number of Slide Outs: 3
Stock Number: FSI207
VIN: 4X4FSER24VJ055598
Description: 2027 Forest River Sierra 3900HBLR 2027 Forest River Sierra 3900HBLR is built for families and extended-stay RVers seeking a luxury fifth wheel with...
Updated: Wednesday, October 21, 2026 10:45 AM
Seller: Giant RV-Colton
Condition: New
Exterior Length: 43 ft
Sleeps: 4
Number of Slide Outs: 3
Fresh Water Tank Capacity: 70 gal
Stock Number: 363623
Description: NEW 2027 FOREST RIVER SIERRA 3900HBLR – 363623
Forest River Sierra 3900HBLR Fifth Wheel highlights:
Front Bathroom with Wardrobe
Privat...
Updated: Wednesday, October 28, 2026 03:34 AM
Seller: General RV Center
Condition: New
Exterior Length: 43 ft 11 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 16,415 lb
Number of Axles: Tandem
Description: New 2027 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Friday, October 30, 2026 03:50 AM
Seller: Keystone RV Center
Condition: New
Stock Number: 93401
VIN: 4X4FSER28TJ055438
Description: AI Generated Description The Forest River Sierra 3900HBLR Towable stands out with three slideouts and a substantial length of five hundred thirteen...
Updated: Wednesday, October 28, 2026 10:48 AM
Seller: Ron Hoover RV & Marine - Tulsa
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 16,085 lb
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Wednesday, October 28, 2026 10:48 AM
Seller: Ron Hoover RV & Marine - San Antonio
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 16,085 lb
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Sunday, September 06, 2026 03:45 AM
Seller: Green Castle - Camper Liquidators
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 13,085 lb
Exterior Height: 13 ft 4 in
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: The following is a list of Additional Options besides the Standard Features come with the unit a...
Updated: Wednesday, October 28, 2026 09:22 AM
Seller: Best RV Center
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 13,085 lb
Exterior Height: 13 ft 4 in
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Friday, October 30, 2026 12:07 PM
Seller: Fun Town RV - Jackson
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 16,085 lb
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Friday, October 23, 2026 11:09 AM
Seller: Markquart RV - Appleton
Condition: New
Exterior Length: 42 ft
Sleeps: 4
Number of Slide Outs: 3
Gross Vehicle Weight: 13,085 lb
Fresh Water Tank Capacity: 50 gal
Description: SIERRA
(2026) These Typical Features, Vary by Model
Living SpacesPower Patio Awning with LED Strip LightingMORryde Step Above Quad Entry StepFoldab...
Updated: Friday, October 23, 2026 11:08 AM
Seller: Kunes RV of Door County
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 13,085 lb
Exterior Height: 13 ft 4 in
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Friday, October 30, 2026 12:07 PM
Seller: Fun Town RV - Indianapolis
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 13,085 lb
Exterior Height: 13 ft 4 in
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Friday, October 30, 2026 12:07 PM
Seller: Fun Town RV - Nature Coast
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 13,085 lb
Exterior Height: 13 ft 4 in
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Friday, October 30, 2026 12:07 PM
Seller: Fun Town RV-Cleburne
Condition: New
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 13,085 lb
Exterior Height: 13 ft 4 in
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Friday, October 30, 2026 12:07 PM
Seller: Fun Town RV - Grand Rapids
Condition: New
Exterior Length: 43 ft 8 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 16,445 lb
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: Wednesday, October 28, 2026 10:48 AM
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
Seller: Markquart RV - Appleton
Condition: New
Exterior Length: 3 ft 7 in
Sleeps: 8
Number of Slide Outs: 5
Fresh Water Tank Capacity: 50 gal
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
Seller: General RV Center
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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: Friday, October 30, 2026 12:07 PM
Seller: Fun Town RV-Conroe
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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, October 28, 2026 10:48 AM
Seller: Ron Hoover RV & Marine - San Antonio
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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, October 28, 2026 10:48 AM
Seller: Ron Hoover RV & Marine - Texarkana
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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, October 28, 2026 10:48 AM
Seller: Ron Hoover RV & Marine - Georgetown
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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: Friday, October 30, 2026 12:07 PM
Seller: Fun Town RV-Cleburne
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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: Friday, October 30, 2026 12:07 PM
Seller: Fun Town RV-Cleburne
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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
Seller: Green Castle - Camper Liquidators
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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: Thursday, October 29, 2026 03:13 AM
Seller: North Country RV
Condition: New
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Gross Vehicle Weight: 15,375 lb
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
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: Wednesday, October 28, 2026 10:48 AM
Seller: Ron Hoover RV & Marine - Tulsa
