Aftermarket upgrades

Asked by PutBackPat Aug 22, 2016 at 03:49 AM about the 2016 GMC Sierra 1500 SLT Double Cab 4WD

Question type: Car Customization

I'm considering installing an aftermarket tuner, a
cold air intake, and an exhaust system in order to
improve my gas mileage. Will these upgrades
really improve my gas mileage? Could these
upgrades cause damage to the engine?

3 Answers
159,365

Bob answered 8 years ago

Been there and tried that, several times. The only thing those upgrades will do is make a very few extra horse power and fuel mileage will be the same, slightly less if you utilize the horse power. Save your money.

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45,255

jamnblues answered 8 years ago

It's a brand new truck? and you think you can improve on the efforts of a team of GM engineers? Be careful- messing with the truck may void your warranty-

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