The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Would you swap a 454 for 6.0 to pull with?

burnin oil · 08-10-2015, 08:17 AM

I didn't read all the posts but here is my experience with the factory 6l in a 2003standard cab 2500hd 4x4 with 4.10s and a nv4500. It always got 14.4 mpg empty and 12 towing light loads, maybe 5000 lbs. It always felt like it was working hard to pull a load and wouldn't maintain on a grade at interstate speeds. After 45 minutes the computer would decide to derate anytime a load was on the truck. I think the LS series motors make great hotrod motors and I am even considering one in my 72 daily driver but I wouldn't have one to tow a john boat. Hopefully programs like LS1 edit can fix what GM screwed up in the computer. I have not been happy with any of GMs programing with a stick shift.

08-10-2015, 08:17 AM	#31
burnin oil Registered User Join Date: Jan 2013 Location: Eastern TN Posts: 1,919	Re: Would you swap a 454 for 6.0 to pull with? I didn't read all the posts but here is my experience with the factory 6l in a 2003standard cab 2500hd 4x4 with 4.10s and a nv4500. It always got 14.4 mpg empty and 12 towing light loads, maybe 5000 lbs. It always felt like it was working hard to pull a load and wouldn't maintain on a grade at interstate speeds. After 45 minutes the computer would decide to derate anytime a load was on the truck. I think the LS series motors make great hotrod motors and I am even considering one in my 72 daily driver but I wouldn't have one to tow a john boat. Hopefully programs like LS1 edit can fix what GM screwed up in the computer. I have not been happy with any of GMs programing with a stick shift.