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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: Friday, September 11, 2026 07:55 AM
Seller: Green Castle - Camper Liquidators
Stock Number: A6188
Condition: New
VIN: 4X4FSES28VJ055582
Description: New 2027 Forest River RV Sierra 3990FL
Details: Call for details.
Updated: Tuesday, August 25, 2026 03:13 AM
Seller: Markquart RV - Appleton
Stock Number: 98290
Exterior Length: 43 ft 8 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
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: Monday, September 14, 2026 09:49 AM
Seller: Ron Hoover RV & Marine - Odessa
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: Monday, August 17, 2026 10:16 AM
Seller: General RV Colorado
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: Monday, September 14, 2026 09:49 AM
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: Monday, September 14, 2026 09:49 AM
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: Monday, September 14, 2026 09:49 AM
Seller: Ron Hoover RV & Marine - Georgetown
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: Thursday, September 10, 2026 06:04 PM
Seller: Fun Town RV-Conroe
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: Thursday, September 10, 2026 06:04 PM
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: Tuesday, September 15, 2026 06:03 PM
Seller: Fun Town RV-Cleburne
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, August 19, 2026 03:13 AM
Seller: North Country RV
Stock Number: T89498
Condition: New
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: Monday, September 14, 2026 09:49 AM
Seller: Ron Hoover RV & Marine - Tulsa
Stock Number: T89498
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: Monday, September 14, 2026 09:49 AM
Seller: Ron Hoover RV & Marine - Tulsa
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, September 10, 2026 08:14 AM
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: Tuesday, September 01, 2026 09:57 AM
Seller: Camper Liquidators-Chesapeake
