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Hey everyone, first time GMC buyer as well as not been in the game of aftermarket part upgrades in a long time. I think the last time I shopped around for aftermarket parts the intake powered fans that were “+10hp and +3mpg” were a thing. Hence why I’m here.
I’ve been perusing the internet just looking at the different options out there for my truck. Some of the claims seem pretty wild so I wanted to come and ask those of you who have been there and done that.
Looking at bang for the buck types of upgrades, mostly hoping for some mpg improvements but hp would be great as well. One of the more wild claims I’ve seen are some OBD-II Plug and Play Tuners, some claiming Stage-based improvements between 20-60hp and 1-6mpg (very skeptical, but wanted to make sure with you guys). Any info/recommendations would be greatly appreciated!
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If i were you i would start with a cold air intake or at least a high flow drop-in air filter, Those intake fans don’t work. Then next i would do better spark plugs and then an exhaust. After that would be a handheld tuner which is going to be the biggest increase, but i’m not sure if that would void the factory warranty.
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