Chevy Silverado and GMC Sierra Mileage Improvement
azcounselor Member Posts: 4
edited June 2014 in Chevrolet
Will GM step up and help out the the consumer who owns a truck or suv? They always talk about consumer loyalty, how about loyalty to the consumer. GM needs to step up and create a fix for our engines to increase fuel mileage. This fix, which I'm sure GM already has developed for future vehicles, would go along way in the PR department. It would also keep loyal GM owners from feeling abandoned and keep them buying GM. It might also help save jobs. Any thought on this.
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Chevy trucks and SUV already have best in class mileage. With gas prices at an all time high and SUV/truck sales down the tubes you can bet that GM would've introduced any significant mileage increase miracle if they had one rather than closing down 4 plants.
kcram - Pickups Host
i have a 2003 silverado 4x4 with a 5.3. my question is that i feel the mileage is poor compared to what i have heard other trucks are getting. the best hwy i've seen has been 15.5 hwy. i put a volant cold air intake, a torque spacer and a magnaflow exhaust system all with claims of mileage improvements. i have driven this vehicle at a pace to try to get mileage but have not seen any gain. any ideas?
Last time changed plugs and wires?
What kind of motor oil and weight?
What rear end?
the tires and rims are 17" off a 2007 gmc 4x4 goodyear wrangler ats 38 psi
never changed plugs or wires it has 64000 miles on it
i use 5-30 havoline but thinking about switching to schaffers synthetic on a recommendation from a friend at the local napa store.
the rear axle ratio i have no idea
See the article listed below for a good start
Lets us know how you make out!
No check engine, no problems..just inquiring about mileage.
Yes I fear that is all the mileage you are going to get, even with K&N, and a tonneau cover, I'm averaging 18.2mpg(city20% and highway80%) (5.3 liter V8), it also has to do with your rear end gearing.. if you have the higher gear set or a towing lower gear set.
My guess is make as much air flow through the engine with as much ease, then due to you large V8, up the gearing of your rear, that will likely help. if you dont live in Colorado or in the mts in general ...
I bought the mass airflow sensor and have had no luck, just that there is too much oxygen in the mix.. and an engine light is now cycling on and off
see my post here General Intake / Exhaust Mods ... #862 of 864The Generation II FIPK® is K&N's & Granatelli MAF by ttaupier1, might be an option