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Jet performance chip for 5.3 Vortec?

8K views 4 replies 4 participants last post by  Rokcrln 
#1 ·
I just bought a 2010 GMC Sierra SLE Ext Cab with the 5.3 engine. I love the truck, even love its performance, but honestly its numbers are disappointing in comparison to the Ford 5.0 (Coyote) and Dodge 5.7 (Hemi) engines. Both engines are rated 45hp and 75hp higher than my 5.3 is.

Jet makes a so-called "chip" (Which installs in between the wiring harness and the ECM) which claims 25+ hp. A set of headers and exhaust would probably put me close to the same hp-per-ci as the ford/dodge.

But what else can I do? Shame on GM for producing something uncompetitive....
 

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#5 ·
Also look into the untapped power you can get from a dyno tuned trans. I have an 05 5.3L/4L60E in my 70 C10 and after having the truck dyno'd they got an extra 40hp to the wheels from just tweaking the trans and changing the DBY from 50% at idle to 75% at idle and boy did that wake things up.

Kevin
LFD Inc.
 
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