New Gears.... now what???

roadjunkie wrote:

Downwindtracker2 wrote:
2005 isn't 1975,gawd they were bad then. Most engines now a days are pretty well tuned. But in your case you'll need a program with more high rpm emphasis and it's worse mileage. Face it, you really want a diesel.

2005 isn't 1975 but a lot has changed since 2005. My GMC has the same engine as the new 2017 but computer technology has given it a gain in both HP and Torque.

2005 GMC Sierra 1500 RWD 5.3l
HP: 295
Torque: 335 ft. lbs.

2017 GMC Sierra 1500 RWD 5.3l
HP: 355
Torque: 383 ft. lbs.


Thanks for the comment.

I had a 2015 Silverado with the new 5.3 that came out in the 2014 redesign. I posed this question over on gm trucks.com.

The new 5.3 is vastly different than your 5.3. Look it up sometime, if you have some extra time. They share the same displacement, but very few items. The new 5.3 is all aluminum, has VVT, A newer version of the MDS that works much better than the prior from what i understand, etc.

My 15 Silverado had great power, no question. As far as tunes go, my understanding is the BB tune really helps the terrible transmission tuning those trucks have, vastly improves the laggy, lazy throttle response and can remove all the torque management gm puts info those trucks.

I hear it makes a huge difference. You can get 87 and 93 octane tunes. I would have gotten one if I kept that truck. I hated the transmission tuning and lazy throttle response that truck had.

Also, gears make a big difference. Ask anyone who has raced 5.0 mustangs (i have) the difference between a 3.27 gear and a 3.73 gear in an otherwise stock 5-speed car. Huge improvement. Dollar for dollar, gears are the best bang for your buck in terms of performance improvenent.

These are just my opinions, YMMV. Good luck.