Chevy 2500 HD 6.0 question
I’m towing a 7500 lb. Cougar 28SGS. The truck I have is a 03 Silverado 2500 HD 6.0 with 4.10 rear. This rig tows fine in cooler weather with no A/C and fairly flat to moderate hills. When I pull in de...
Forum Discussion
Curly2001 wrote:
Let it run at 4,000 or above on the hills. It does it's best at higher RPM's than lugging it slower. Have had mine at 4,500 rpm going up some longer passes towards Flagstaff. It is made to do it's best at higher rpm.
Curly
True. My 6.0L would tow okay under 3,000RPM, but when I hit the hills it would lug a little, but then acted like it drank wake-up juice between 3500-4500RPM.
For some light reading, here's information on the GM LQ4 engine.
LQ4 engine specs
Just for reference, here is dyno test results showing the torque and HP curves of the engine. If you notice, peak torque is achieved at 4,000RPM with the meat of the band between 3500-4500 RPM. Max HP is achieved at 4,400RPM. So yes, if you keep the engine between 4,000-4,500 RPM you're in the range where absolute maximum power is being produced.
