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....
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....