Comparing SumoSprings and Timbrens for a 2021 GMC Sierra 1500 AT4
Published 09/28/2022
Products Featured in This Question
Question:
Hello, I have a 2021 GMC 1/2 ton AT4. Have the front leveled - Rear is stock. Looking for helper springs to reduce sag. What do you recommend? Timbren T28MR or SumoSprings SS45FR?
asked by: Jon K
Expert Reply:
The Timbren Suspension Enhancement System part # T28MR and SumoSprings Solo Custom Helper Springs part # SS45FR are both great options for a 2021 GMC Sierra 1500 AT4. I recommend the SumoSprings as they don't typically ride as rough as the Timbrens but the Timbrens also offer more support. They are both however bolt-on, no maintenance options.
Please note, a leveling kit won't warranty any additional spacers to be added to the rear suspension enhancements. These kits are also not compatible on models with Adaptive Ride Control.
Product Page this Question was Asked From
Timbren Suspension Enhancement System - Rear Axle
- Vehicle Suspension
- Towing/Load Leveling
- Bump Stops
- Suspension Only
- Heavy Duty
- Rear Axle Suspension Enhancement
- Timbren
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Suspension Enhancement
- Search Results: suspension enhancement
- Search Results: sumosprings rear
- Shop: Timbren Suspension Enhancement System - Rear Axle
- Video: Timbren Suspension Enhancement System-T28MR: The Breakdown
- Search Results: sumosprings
- Search Results: sumo spring spacer
- Search Results: spacers vehicle suspension
- Video: Timbren Rear Suspension Enhancement System DIY Install - 2026 Chevrolet Silverado 1500
- Q&A: Will The Timbren Suspension Enhancement Fit a 2024 Chevrolet Silverado 1500 ZR2?
- Q&A: Comparing Timbren and SumoSprings for The Rear Suspension of a 2021 Toyota Tundra
- Q&A: Differences Between the Timbren and SumoSprings for a 2012 Toyota Tundra
- Video: Timbren Rear Suspension Enhancement Step-by-Step Install on a 2025 Chevrolet Silverado 1500
- Shop: Timbren Suspension Enhancement System - Severe Service - Rear Axle
- Video: Feature Breakdown: SumoSprings Solo Custom Helper Springs-SSR-610-47
- Video: Choosing the Right Vehicle Suspension Upgrades
- Q&A: Will The Timbrens Affect My Ride Quality When Not Hauling a Heavy Load?
- Video: Comprehensive Review: SumoSprings Rebel Kit Spacers for Lifted Trucks
- Q&A: Could Timbren Kit # T28MR for 2025 GMC Sierra 1500 fit AT4 Model
- Video: Timbren Suspension Enhancement System Feature Review
- Shop: SumoSprings Rebel Kit Spacers for Lifted Trucks - 2" Lift
- Shop: Spacer Kit for Timbren Suspension Enhancement System
- Shop: Timbren 1" Spacer For Raised Frame Vehicles - 3/8" Bushing
- Shop: Spacer Kit for Timbren Suspension Enhancement System
- Shop: Weigh Safe Pintle Hitch w/ Built-In Scale for 2.5" Hitch - 8" Drop - 22K - Steel
- Q&A: Recommended Timbrens and Spacers for a 2025 Toyota Tundra w/ a Factory Lift
- Search Results: cap sensors tpms sensor
- Search Results: wfco rv power converter
- Q&A: Can Older WFCO Converter Charge Lithium Batteries Without Lithium Compatibility
- Shop: Towing Mirrors