The 2021 Chevrolet Suburban continues its legacy as one of the most capable and spacious full-size SUVs in America. Redesigned for 2021, it offers more legroom, updated tech, and powerful engine choices. Ideal for large families, road trips, or anyone needing a cargo-hauling powerhouse with luxury appeal, the Suburban steps up its game with a bold new look and enhanced ride quality thanks to an independent rear suspension. Here’s everything you should know before getting behind the wheel of the 2021 Suburban.
Why Choose the 2021 Chevrolet Suburban?
A Quick Overview
What It Is: A full-size, three-row SUV designed for families and cargo
What’s New: Complete redesign with more space, new suspension, and updated infotainment
Trims Available: LS, LT, RST, Z71, Premier, High Country
Engine Options: 5.3L V8, 6.2L V8, 3.0L Duramax Diesel
Ideal For: Large families, towing needs, road trip lovers
DIY Friendly? Yes – routine tasks are straightforward, though dealer service may be better for advanced tech features
2021 Suburban Key Highlights
Bold and Refined Exterior Design
The 2021 Suburban ditches its boxy past in favor of a sleeker, more sculpted look. The large front grille, LED headlights, and signature light strip add visual authority, while the longer wheelbase improves proportions.
Pros: Aggressive styling with modern flair
Cons: Its size may be intimidating in tight parking lots
Powerful Engine Choices
You can pick from three capable engines:
- 5.3L V8 (355 hp) – Standard on most trims
- 6.2L V8 (420 hp) – Standard on High Country
- 3.0L Turbo-Diesel I6 (277 hp) – Optional on select trims
Pros: Strong towing capability, smooth shifting 10-speed automatic
Cons: Fuel economy isn’t great with the V8s
Spacious and Comfortable Interior
The redesigned cabin offers more legroom for the second and third rows and best-in-class cargo space. High trims feature leather upholstery, a panoramic sunroof, and available air ride suspension for added luxury.
Pros: Massive interior, especially third-row space
Cons: Base trims feel a bit too basic
Next-Gen Infotainment System
A 10.2-inch touchscreen is standard, with wireless Apple CarPlay, Android Auto, and optional rear-seat entertainment. USB ports are plentiful across all rows.
Pros: User-friendly system, crisp graphics
Cons: Some features only available on higher trims
Advanced Safety and Driver Aids
Standard features include forward collision alert, pedestrian braking, and lane-keep assist. Optional upgrades include HD surround vision, adaptive cruise control, and rear pedestrian alert.
Pros: Good list of safety tech, even at base level
Cons: Some key features are extra-cost options
Common Issues with the 2021 Suburban
Fuel Economy Concerns
Despite a 10-speed automatic transmission, V8 models aren’t very fuel-efficient.
Fix: Opt for the 3.0L Duramax Diesel for better mileage
Large Size Can Be Challenging
Maneuvering the Suburban in cities or parking garages can be tough.
Fix: Choose trims with HD surround vision or park assist features
High Price with Options
Add-ons like the panoramic roof, magnetic suspension, and trailering tech can quickly increase the price.
Fix: Prioritize must-have features and shop across trim levels carefully
Base Trims Lack Luxuries
The LS trim feels bare compared to mid- and high-tier models.
Fix: Consider the LT or RST trims for a better balance of cost and comfort
Infotainment System May Lag
Occasional system lag or unresponsiveness has been reported.
Fix: Ensure the latest software update is installed via dealer or over-the-air
Maintenance and Reliability Snapshot
Routine Maintenance Schedule
Oil Change: Every 7,500 miles (synthetic recommended)
Tire Rotation: Every 7,500 miles
Air Filter: Replace every 22,500 miles
Cabin Air Filter: Every 15,000–20,000 miles
Brake Fluid: Check every 20,000 miles
Transmission Fluid: Inspect at 45,000 miles
Coolant: Inspect at 50,000 miles
Fuel Economy by Engine
- 5.3L V8: 15 mpg city / 20 mpg highway
- 6.2L V8: 14 mpg city / 19 mpg highway
- 3.0L Diesel: 21 mpg city / 27 mpg highway
Tank Size: 28 gallons
Total Range: Around 450–600 miles per tank depending on engine
Reliability Notes
The Suburban has an overall good reputation for durability, particularly with proper maintenance. Some early models reported minor infotainment bugs, but nothing significant mechanically. The diesel engine option adds impressive long-term reliability and fuel economy.
Pros and Cons of the 2021 Suburban
Pros:
✔ Class-leading cargo and passenger space
✔ Smooth ride thanks to new independent rear suspension
✔ Strong towing capacity
✔ Wide range of trims and options
✔ Comfortable third row even for adults
Cons:
✘ Large size makes it hard to maneuver in tight spaces
✘ Fuel economy is below average for gas models
✘ Entry-level trim lacks upscale features
✘ Price climbs fast with options
✘ Some safety tech not standard
FAQs
How many people can the 2021 Suburban seat?
The Suburban seats up to 8 passengers with a second-row bench or 7 with captain’s chairs.
Is the 2021 Suburban good for towing?
Yes. When properly equipped, it can tow up to 8,300 lbs, depending on engine and drivetrain.
Which engine is best in the 2021 Suburban?
The 6.2L V8 offers maximum power, while the 3.0L diesel is the most fuel-efficient and ideal for long-distance or towing-focused driving.
Does the 2021 Suburban have 4WD?
Yes, 4WD is available on all trims and is especially useful for off-road or snowy conditions.
What is the difference between the Tahoe and the Suburban?
The Suburban is longer than the Tahoe, offering more cargo space and slightly more legroom in the third row.
The 2021 Chevrolet Suburban sets a high bar in the full-size SUV class with its combination of space, capability, and updated technology. Whether you’re shuttling kids, hauling gear, or towing a trailer, the Suburban proves it can do it all — and look good doing it. With multiple trims, three engine options, and impressive comfort across all rows, the 2021 Suburban is a full-size SUV that truly lives up to its legendary name.