Graco SlimFit3 LX Review: Top Car Seat for Small Cars?

Looking for a car seat that not only saves space but also guarantees safety and versatility? We had the chance to try out the Graco SlimFit3 LX 3-in-1 car seat in the stylish Kunningham color, and it did not disappoint. The slim design allows you to fit three car seats across your back seat, making it perfect for growing families.

The SlimFit3 LX adapts to your child’s needs as they grow, transforming from a rear-facing harness for 5-40 lbs., to a forward-facing harness for 22-65 lbs., and finally to a highback booster for 40-100 lbs. One of its biggest advantages is its easy installation, thanks to the InRight LATCH system and integrated belt lock-off.

With 10 adjustable headrest and harness positions, the No-Rethread Simply Safe Adjust system ensures the perfect fit for your child at various stages. Moreover, the four-position recline allows for comfortable rides and easy installation. One of our favorite features is the Rapid Remove cover that can be taken off in just 60 seconds for washing without uninstalling the seat.

The breathable mesh AirFlow channels provide excellent ventilation, keeping your little ones cool and comfy during long rides. The two cup holders are designed to work seamlessly with the three-across configuration while the fuss-free harness storage pockets make getting in and out of the car seat a breeze. In addition, the steel-reinforced frame and EPS energy-absorbing foam enhance durability and safety.

Bottom Line

The Graco SlimFit3 LX 3-in-1 car seat is a smart investment for those in need of a space-saving, adaptable, and safe car seat.

Its versatile design grows with your child, while innovative features like the Rapid Remove cover and AirFlow channels add convenience and comfort.

Don’t miss this opportunity to secure a reliable car seat for your family. Click here to purchase the Graco SlimFit3 LX and experience worry-free travels with your little ones.

What is the Graco SlimFit3 LX 3 in 1 Car Seat?

Graco SlimFit3 LX Review (1)

As parents, we understand the struggles of fitting multiple car seats in the back seat. The Graco SlimFit3 LX is a space-saving solution designed to fit three car seats across, without sacrificing safety or essential features. This all-in-one car seat adapts to your child’s growth, transitioning from rear-facing harness (5-40 lb) to forward-facing harness (22-65 lb) and finally to highback booster (40-100 lb).

We’ve personally tested its slim 16.7-inch width in various configurations, ensuring that it accommodates children of different ages and even works alongside select Graco car seats. The InRight™ LATCH system and integrated belt lock-off simplify installation, and the No-Rethread Simply Safe Adjust™ Harness System lets you adjust the headrest and harness to 10 positions with ease.

Not only does it boast a steel-reinforced frame and EPS energy-absorbing foam for safety, but comfort’s also a priority. With breathable mesh AirFlow channels, four recline positions, and removable plush head and body inserts, your child can enjoy a cool and cozy ride. Two cup holders keep drinks close, and the Rapid Remove cover can be taken off in 60 seconds for easy cleaning.

Product Specs


Minimum weight recommendation: ‎5 Pounds
Maximum weight recommendation: 100 Pounds
Minimum height recommendation: ‎57 Inches
Maximum height recommendation: 57 Inches
Number of reclining positions: 4
Orientation: ‎Rear Facing
Rear-facing minimum child weight: ‎5 Pounds
Rear-facing maximum child weight: ‎40 Pounds
Forward-facing minimum child weight: 22 Pounds
Forward-facing maximum child weight: 65 Pounds
Harness type: ‎5-Point


Graco SlimFit3 LX Review

Who should use the SlimFit3 LX 3 in 1?

The SlimFit3 LX 3 in 1 car seat is perfect for families who need to fit multiple car seats in their back seat, as its space-saving design allows for three across seating. Parents with children weighing between 5 and 100 pounds can utilize this versatile car seat, as it features rear-facing, forward-facing, and high-back booster modes. The 5-point harness system ensures children are secure while they grow.

We appreciate the inclusion of four reclining positions, providing comfort and adaptability for various stages of your child’s development. However, the fabric might not be top-tier compared to other premium car seats. Regardless, the combination of space-saving convenience and adaptability makes the SlimFit3 LX 3 in 1 an excellent choice for growing families who value both safety and practicality.

How to use the Graco SlimFit3 LX?

To make the best of the Graco SlimFit3 LX, start by determining the appropriate mode for your child’s age, weight, and height. We’ll outline the application for each of its three modes below:

  1. Rear-facing (5-40 lb): Ideal for infants and smaller toddlers, ensure the car seat’s installation is secure with either the seat belt or LATCH system. Adjust recline angle according to the guidelines.
  2. Forward-facing (22-65 lb): As your child grows, transition to forward-facing mode. Again, secure the car seat using seat belt or LATCH, with proper recline angle and tether attachment.
  3. Highback booster (40-100 lb): Remove the harness and utilize your car’s seat belt through the designated guide to safely restrain your child.

There are 10 headrest positions for optimal comfort, simply adjust with the No-Rethread Simply Safe Adjust Harness System. With Graco ProtectPlus Engineered, you can confidently drive knowing the car seat is built to withstand various crash tests. Utilize the four reclining positions for further customization, but be sure to follow each mode’s guidelines for the safest travel experience.

Graco SlimFit3 LX Review Impressions

We recently tried out the Graco SlimFit3 LX 3-in-1 car seat and found it to be quite impressive in terms of design and functionality. What makes this car seat stand out from its competitors is its slim design; we were able to fit three of these car seats across the back seat, which is perfect for growing families with multiple young children.

The car seat conveniently grows with your child as it offers configurations for rear-facing harness (5-40 lb), forward-facing harness (22-65 lb), and highback booster (40-100 lb). We found the InRight LATCH to be extremely easy to use and secure, while the 10-position No-Rethread Simply Safe Adjust Harness System ensures a comfortable fit for your child.

On the practicality side of things, the Rapid Remove cover can be taken off in just 60 seconds for machine washing without the need for uninstalling the seat or removing the harness. Our child also stayed cool and comfortable thanks to the breathable mesh AirFlow channels provided.

However, a minor drawback was the length of the strap clip which required the child to sit deep into the seat for buckling. We found this a little inconvenient.

Overall, we highly recommend the Graco SlimFit3 LX 3-in-1 car seat for its slim design and adaptable configurations, ensuring safety and comfort for your growing child while maximizing space in your vehicle.


In our experience, the Graco SlimFit3 LX 3-in-1 Car Seat is a great choice for families who need a space-saving solution. With a 4.9 rating and over 45,000 reviews on Amazon, many customers mentioned how the car seat meets their needs in terms of ease of installation, quality, and cleanability. It’s designed to fit three across in a backseat, making it perfect for those with multiple children or smaller vehicles. We appreciated its versatility, as it grows with your child, saving you money in the long run.

On the other hand, some users found that the strap clip on the harness was a bit short, making it difficult to buckle their child comfortably. However, most other aspects of the car seat were well-received, such as its slim profile and robust build. Overall, we confidently recommend the Graco SlimFit3 LX as a reliable and functional option for families in need of a space-saving car seat solution.

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