Explain to me like I'm 5. How easy is an LS swap?

[Sean Buick 76]

Yes as much as I like the 99-06 trucks for towing my pick was a 2012 2500 Hd with L-96 6.0 and 6 speed auto. Much better. I did a mild cam, long tube headers and dual 3” with a professional tune and it’s a monster! Plus big brakes and HD suspension

 

[BeXtreme]

Yes as much as I like the 99-06 trucks for towing my pick was a 2012 2500 Hd with L-96 6.0 and 6 speed auto. Much better. I did a mild cam, long tube headers and dual 3” with a professional tune and it’s a monster! Plus big brakes and HD suspension

I just recently swapped out the LC9 5.3 in my 2011 Burb for a L9H 6.2L and it LOVES to tow now. Especially if I can get E85 in it. Mild VVT cam and full intake/exhaust and it pulls our travel trailer through the cascades like it's nothing. I can pull a mountain pass at 65mph at about 1/2 throttle now where the 5.3 would be full throttle and slowing to 50mph or less on some of the hills. Cruises on flats on the freeway at ~2200RPM at 70MPH in 5th with the converter locked up. Unloaded it drops to ~2k RPM in 6th at 75mph and just purrs along.

I paid $1500 for the engine/trans/ECU and wiring harness all together and put ~2K into freshening it up and the new cam. I had already rebuilt the trans about 60k miles ago with some beefed up parts and a billet converter, so didn't need to touch any of that.

 

[Sean Buick 76]

Yes the 6.2 is another jump up in performance and efficiency over the 6.0!

 

[L31MaxExpress]

Yes the 6.2 is another jump up in performance and efficiency over the 6.0!

The 6.6L L8T is even more of a bump. If I were buying something newer to tow, would be an Express van or newer 2500 truck with a 6.6L and a 6L90E. Swap the 3.42s for 4.10s, tune it and let it eat. I would not overlook a GMT800 Suburban or the 01-02 van with an 8.1L and 4L85E either but I would want 4.10s in it. The Allison in the 2500HD trucks is a great transmission but power hungry and makes the 8.1L trucks a bit of a slug compared to the Suburban/Avalanche.

 

[Drunkcanuk]

Yes the 6.2 is another jump up in performance and efficiency over the 6.0!

Don't start on that now Mr Bad Influence!! LOL