What is the International LT?
The International LT Series is a North American heavy-duty highway tractor family. Current specifications list S13 and Cummins X15 engines, with day-cab, 56-inch and 73-inch sleeper choices. Earlier LT trucks can have different powertrains: identify the model year and build sheet before applying current specifications.
Identify the complete powertrain
International lists both S13 and Cummins X15 engines for the LT. The S13 Integrated Powertrain combines the S13 engine, T14 automated manual transmission and Dual Stage Aftertreatment. Separately, the cab catalogue includes day, 56-inch sleeper and 73-inch sleeper choices. An LT badge therefore cannot establish the engine package or living space, even when the truck has the aerodynamic appearance associated with the current range.
Separate the sleeper choice from trim
For a driver spending several nights away, compare the sleeper dimensions and sleeping arrangement before choosing an interior trim name. Trim describes equipment and finish; it is not a substitute for cab size. Then put the engine and transmission combination on a separate line of the comparison. This prevents a well-equipped sleeper from masking a different drivetrain and keeps the reasons for a price difference visible when comparing two LT quotations.
What matters in a comparison
Compare an LT on the routes, loads and cab requirements that matter to the operation. If a seller cites S13 figures, confirm the truck actually has that system and identify the model year. Keep financing or depreciation, maintenance allowance and fuel assumptions separate. A newer powertrain claim is not evidence of lower total cost for every used-truck purchase.
Questions to take to the supplier
- Which engine and transmission are fitted?
- What cab and sleeper setup is included?
- Are quoted fuel figures applicable to that generation?
Sources & limits
Manufacturer references support the model facts. Our examples and comparisons are editorial interpretation prepared with AI assistance, not road tests or an expert inspection.
Check the year, market and exact build before applying a specification. This guide does not authorize parts fitment, repairs, modifications or loading.
Published specifications and examples retain their labelled units; the header preferences apply to calculators.
Editorial method & reference limits · Report a correction
