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2003 Chevy Silverado
Performance Chips & Programmers

2003 Chevy Silverado Performance Chips & Programmers

Not sure which 2003 Chevy Silverado Performance Chips & Programmers are right for you? We have over 7429 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:

"I THINK THE EDGE JUICE W/ATTITUDE CS IS A BIG HELP WHEN TOWING, IT SURE GAVE MY DURAMAX A SHOT IN THE ARM .EAASY INSTALL,GREAT VALUE AND LOOKS GREAT IN MY 03 CHEVY 2500HD. I HAVE NOT NOTICE ANY INCREASE IN FUEL MILEAGE YET, HOPE IT IMPROVE." —Gary V from Barlow, OH bought an Edge Juice with Attitude CS or CTS for a 2003 Chevy Silverado, 6.6L Duramax.

"literally 10 min install - just as described. quicker shifts on total stock 2003 silverado 6.0; around 300-400 rpm decrease at highway speed on economy mode. around 2-3 mpg in city well worth the driveability alone..good product/" —Ricardo B from Albuquerque, NM bought a Superchips Flashpaq Tuner for a 2003 Chevy Silverado, 6.0L V8.

"I THINK THE EDGE JUICE W/ATTITUDE CS IS A BIG HELP WHEN TOWING, IT SURE GAVE MY DURAMAX A SHOT IN THE ARM .EAASY INSTALL,GREAT VALUE AND LOOKS GREAT IN MY 03 CHEVY 2500HD. I HAVE NOT NOTICE ANY INCREASE IN FUEL MILEAGE YET, HOPE IT IMPROVE." —Gary V from Barlow, OH bought an Edge Juice with Attitude CS or CTS for a 2003 Chevy Silverado, 6.6L Duramax.

"Perked up my Duramax. I'm still playing with the settings. Havent checked the miliage yet. Hardest part of the installation was drilling & taping the hole in the manifold. It would be easier if done on a hoist. I have ordered a 4" exhaust kit to complete the package." —Edward P from Fort Morgan, CO bought an Edge Juice with Attitude CS or CTS for a 2003 Chevy Silverado.

"Even on level 1 do you notice huge gains in power. I have an mbrp straight pipe exhaust which gave me turbo lag but with the edge juice with attitude it took it right away. Sometimes takes a minute for power to be noticeable when you first jump in. Also takes the transmission a little to get used to the huge power gains in the upper levels. Otherwise I love it. Worth the money." —Brad H from Kingman , AZ bought an Edge Juice with Attitude CS or CTS for a 2003 Chevy Silverado, 6.6L Duramax.

"Wow. Unleash the beast. I couldn't believe how much I was limiting the power of the Duramax until I installed the Edge Juice with Attitude. I have only used it for approximately 100 miles to play around with the different power settings. Can't wait to put it to the test with 12k lb. fifth wheel load." —Kory T from West Jordan, UT bought an Edge Juice with Attitude CS or CTS for a 2003 Chevy Silverado, 6.6L Duramax.

"The chip was fairly easy to install if you have a torque wrench. Make sure you torque it down to factory spec or lights will come on the dash and gas gauge may not work right. Once torqued down it works great, better mileage and horsepower and with the price of gas where it is it should pay off in no time." —Kim B from Mount Vernon, IN bought a Jet Performance Module for a 2003 Chevy Silverado, 2.2L CPI 4-cyl..

"literally 10 min install - just as described. quicker shifts on total stock 2003 silverado 6.0; around 300-400 rpm decrease at highway speed on economy mode. around 2-3 mpg in city well worth the driveability alone..good product/" —Ricardo B from Albuquerque, NM bought a Superchips Flashpaq Tuner for a 2003 Chevy Silverado, 6.0L V8.

"You just can't go wrong here... Took less than 10 minutes to install from pulling from the box to putting it back in afterwards. A lift kit and oversized tires cut back on my power and this programmer more than made up for it." —Josh C from Tuolumne, CA bought a Hypertech Max Energy Programmer for a 2003 Chevy Silverado.

"i have recently purchased a superchips flashpaq tuner and couldnt be more pleased. i have a 2003 silverado 1500 HD with a 6.0 and 6 inches of lift with 35 inch tires. the adjustments to correct the speedometer and adjust shifts were enough by themselves to get my attentioni but with the performance setting and the economy setting you can have decent power gains and or fuel mileage gains of up to 3.2 mpg!!" —Patrick R from Longview, WA bought a Superchips Flashpaq Tuner for a 2003 Chevy Silverado, 6.0L V8.

"Dont really notice a difference unless you floor it. I found that the stock shift points work just fine. Its fun to go over 100 MPH . Now my truck roasts the tires with ease. Only get better gas if you grandma drive. Im happy. Headers next!" —Dustin D from Grand Junction, CO bought a Hypertech Max Energy Programmer for a 2003 Chevy Silverado, 5.3L V8.

In addition to Chevy Silverado Performance Chips & Programmers, you may also enjoy one of these popular products: TracRac TracVan, aFe Air Filters, Coverking Coverbond 4 Universal Car Covers.
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Bully Dog GT Platinum Tuner

Best bang for the buck

I really enjoy it. I can tell a difference in the shift points and firmness and being able to see all the gauges that my truck doesnt have but ive been getting check engine lights ever since i installed it and doesnt make any sense but other than that it works good. View more reviews...
Posted By Raymond P (SALINA, KS) / April 18, 2019
2003 Chevy Silverado
Yes
No
DiabloSport Predator P2 Tuner

diablo tuner 03 duramax

the tuner is very easy to install with different settings can also set tire size speed limit and gear ratio with other settings i also have one for my 05 duramax its just as easy to use and reliable thats why i bought one for my 03 duramax thanks great product no complaints View more reviews...
Posted By Nicholas M (Brush, CO) / January 2, 2012
2003 Chevy Silverado
Yes
No
Jet Performance Module

JetChips 20002 Module

The chip was fairly easy to install if you have a torque wrench. Make sure you torque it down to factory spec or lights will come on the dash and gas gauge may not work right. Once torqued down it works great, better mileage and horsepower and with the price of gas where it is it should pay off in no time. View more reviews...
Posted By Kim B (Mount Vernon, IN) / June 11, 2008
2003 Chevy Silverado
Yes
No