Biggest difference is the transmission. The HD pickups with the 8.1 had the Allison behind it, while the Suburb/Yukon 2500 with the 8.1 only had the 4L80.
Lane Anderson
lka1988
Biggest difference is the transmission. The HD pickups with the 8.1 had the Allison behind it, while the Suburb/Yukon 2500 with the 8.1 only had the 4L80.