Cost
The GMC Envoy isn't much more expensive than the Chevrolet TrailBlazer with respect to MSRP.
Utility
The GMC and the Chevrolet TrailBlazer can accommodate the same number of passengers.
There's no clear winner between the GMC Envoy and the TrailBlazer when it comes to transporting cargo.
There's little the Chevrolet can tow that the GMC cannot.
Dimensions
The GMC Envoy and the TrailBlazer compete for the same parking spaces.
Warranty
The Chevrolet and the GMC Envoy have the same basic warranty.