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Chevy Silverado and GMC Sierra Mileage Improvement

16 messages,  Last post on Oct 04, 2009 at 6:53 AM

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What is this discussion about? Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, Truck

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#7 of 16 Re: MAP SENOR adjustment to improve gas milage [mrmouse3] by obyone Jun 12, 2008 (11:06 am)
Replying to: mrmouse3 (Jun 11, 2008 1:28 pm) If it doesn't have a screen there's not much you can do with it since all it does is measure the volume and temperature of the incoming air.
#8 of 16 Any bolt on MPG improvements for 2004 chevy2500 by chevy412sp Jun 26, 2008 (6:19 am)
I own a 2004 chevy 2500 with a 6.0L and a 3.73 axle ratio. I am wondering if anyone as a similiar truck or same size motor that has put any bolt on's such as a air intake kit, fuel catalyst system, computer programmer, throttle body spacer, or anything else that has gotten any real world MPG improvements. I read about alot of the products that "SAY" they give you MPG increases. I wondering if anybody as any experiences with the products? Replies to this message: obyone (Jun 26, 2008 3:15 pm)
#9 of 16 Re: Any bolt on MPG improvements for 2004 chevy2500 [chevy412sp] by obyone Jun 26, 2008 (3:15 pm)
Replying to: chevy412sp (Jun 26, 2008 6:19 am) The items that you've listed will do two things. Increase in cab noise and lighten your wallet. The manufacturer would've done all of the above in their quest for bragging rights in increased mpg if they beleived it would've helped.
#10 of 16 2003 silverado 4x4 by kazper62 Nov 11, 2008 (7:48 pm)
hello all,  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? Replies to this message: obyone (Nov 11, 2008 9:49 pm) kazper62 (Nov 12, 2008 8:40 am) obyone (Nov 12, 2008 1:48 pm)
#11 of 16 Re: 2003 silverado 4x4 [kazper62] by obyone Nov 11, 2008 (9:49 pm)
Replying to: kazper62 (Nov 11, 2008 7:48 pm) What brand tires, size, and psi are you running?   Last time changed plugs and wires?   What kind of motor oil and weight?   What rear end? Replies to this message: kazper62 (Nov 12, 2008 8:40 am) obyone (Nov 12, 2008 1:48 pm)
#12 of 16 Re: 2003 silverado 4x4 [obyone] by kazper62 Nov 12, 2008 (8:40 am)
Replying to: obyone (Nov 11, 2008 9:49 pm) hi    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 Replies to this message: obyone (Nov 12, 2008 1:48 pm)
#13 of 16 Re: 2003 silverado 4x4 [kazper62] by obyone Nov 12, 2008 (1:48 pm)
Replying to: kazper62 (Nov 12, 2008 8:40 am) I'd do the switch to synthetic. Also change the plugs and wires even though GM says it's good to 100K. You will probably show a little increase with the changes. Nothing major but a little here and a little there adds up.
#14 of 16 Re: MAP SENOR adjustment to improve gas milage [mrmouse3] by stacks125 Mar 04, 2009 (6:41 pm)
Replying to: mrmouse3 (Jun 10, 2008 10:20 pm) that sounds like a great idea. Would you be able to let me in on some info on what it takes make it run on hydrogen and did you notice any power loss?               Thanks Stacks Replies to this message: mrmouse3 (Mar 07, 2009 5:27 am) dabell7 (Oct 04, 2009 6:53 am)
#15 of 16 Re: MAP SENOR adjustment to improve gas milage [stacks125] by mrmouse3 Mar 07, 2009 (5:27 am)
Replying to: stacks125 (Mar 04, 2009 6:41 pm) Depending on how elaborate you want to make the HHO device, it can cost any where from $100.00 to $900.00. I found all the plans on-line (google for HHO) and then built it. Mine cost me $130.00. I used 2 seamless stainless steel pipes (2" and a 2 1/4" by 9" long) $80.00 plus a water filter from Tractor Supply $17.50 and made my own bubbler $10.00 and bits and pieces from AUTO ZONE +/- $15.00. I had an increase of power and a increase in gas mileage. I went from (21 gal tank) 290 - 320 miles and now 380 to +/- 400 miles if I drive like an old lady. If I want to spend a little more, I probably could improve that up to around 475 to 500 miles per 21 gal tank. AND yes thats 25 mpg. I went from 15 - 18 mpg to 18 - 21 mpg. Replies to this message: dabell7 (Oct 04, 2009 6:53 am)
#16 of 16 Re: MAP SENOR adjustment to improve gas milage [mrmouse3] by dabell7 Oct 04, 2009 (6:53 am)
Replying to: mrmouse3 (Mar 07, 2009 5:27 am) Did you do anything with your MAP sensor or your O2 sensor? I am in the process of doing a HHO system.

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