| Decision | L6 | L7 |
|---|---|---|
| Primary chassis question | Standard-height or low-profile variant? | Which brake and suspension package? |
| MY2027 automatic | Allison 2200 RDS | Allison 2500 RDS |
| Useful next step | Check loading height and delivery access | Check axle loading with dense freight |
Start with the route’s heaviest realistic load
Build a load list that includes the body, liftgate, fuel, occupants and carried equipment. Compare axle scale weights as well as total weight. A higher-rated chassis may be necessary for dense freight, while a lighter configuration might meet the work with less unused capacity. Neither conclusion follows from box length alone.
Body height and brake choice can decide the purchase
The L6 low-profile branches deserve their own body-height review. For either model, match the actual brakes and suspension to driver availability, local service support and the intended installation. Compare quotes with equivalent body construction and equipment; a cheap chassis with an unsuitable body can create more work than a correctly specified complete truck.
Sources and reference scope
Reviewed September 9, 2026. Manufacturer facts are tied to the edition below; inspection and purchase-planning questions are editorial guidance.
Canadian MY2027 L6, L7 and L8. Published chassis choices; individual option combinations require the order sheet.
Select the truck model year and conventional or cab-over chassis before using installation drawings.