I haven't heard that. But it might be true. The only 07 models that used the 8.1 are the Suburban and Avalanche and the 8.1 is missing from the engine options.The 07 Silverados aren't out yet. Its probally because GM increased the power in the current gen3 Vortecs. There are the new VortecMax'es available in 5.3,6.0 and a new 6.2. There is an Escalade only 6.2 that pumps out 403HP and somewhere around 500 lb ft for torque. See, you dont need hemi heads to make that kind of power. And they get better MPG than the Ford and Dodges too. :moon: Now all the General needs to do is put a heavy duty frame under these pigs so they can put the D-Max in them.firebird_1252 said:thats really weird. btw i love the power of the 8.1. i also herd that they arent making them anymore due to no one is buying them.
Plus they run forever and mine is getting pretty decent fuel mileage as well. Averages about 20-21 mpg in mixed driving, but hit the highway and the sucker will knock down 22 mpg cruising at 70 mph. Got nothing but love for the ol rattling Cummins...RealestVIN7 said:Can't beat an inline 6 for reliable torque and power. Turbodiesels are supposed to be inline. The Cummins is a genuine turbodiesel with tried and true heritage. :headbang: ...Plus they sound better...again. Lol!