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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

501 messages,  Last post on Nov 25, 2009 at 3:30 AM

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What is this discussion about? Chevrolet Silverado 2500HD, Chevrolet Silverado 3500, GMC Sierra 2500HD, GMC Sierra 3500, Diesel, Fuel Efficiency (MPG), Truck

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#121 of 501 Re: DURAMAX THROTTLE RESPONSE [aarongd] by aarongd Oct 31, 2005 (3:26 pm)
Replying to: aarongd (Oct 27, 2005 12:30 pm) the dealer finally figured out the problem. it was a clogged fuel filter!!! i have 16,000 mi and i can't believe it was clogged!!! and they wanted to charge me $180.00 to fix it. say's it wasn't under warrenty!!! say it's like an oil change. good thing i spent $49,000 on a chevy. might want to get your own from a parts store!!!!!!!!!!!!!
#122 of 501 Re: DURAMAX FUEL MILEAGE [jayceethe3rd] by stoneg Nov 06, 2005 (6:15 pm)
Replying to: jayceethe3rd (Oct 25, 2005 9:51 am) at a place in Tallahassee, FL called MINCO If your nowhere near here, look on EBay, I've seen them there for, I think around $40-$60. After you change them out, you'll need to get your truck re-aligned. If you want to get that "cadilac" ride back after the torsion key install, switch your front shocks out to the Bilstien 5100 series. These shocks are longer to accomodate the 2.5 inch increase in height. I didn't do it at first, and the ride was pretty bad going over even a speed bump at low speeds. It seemed as though the truck would "top out" causing the truck to slam up and down. If you do it (highly recommended) go ahead and spend the extra $100.00 on the shocks. I have seen the shocks in accessory catelogs for less, but I had minco order and install these as well. I get lots of compliments at stop lights, gas stations, etc. for the way the truck sits level. Good Luck.
#123 of 501 05 D-Max by lt16spdss Nov 10, 2005 (7:13 am)
I have an '05 2500HD Crew 4x4 D-Max/Allison... I love this truck. I bought her new on May 1, and since then have put 18,750 miles on her. This truck is my daily commuter, not to mention I've towed everything from bobcats with a total load of 12k on the ball hitch to little pup trailers. I have found my normal unloaded mileage with my commuting around the DC area, has averaged 17-18.5 mpg's, on the highway unloaded I have found I get about the same but I'm holding 75mph. I have a K&N filter in mine, and haven't noticed a difference in the mileage or performance at all. One thing I noticed that did cause a change in my MPG's was source of the diesel I was using. I have found that getting my diesel from a quality supplier helped in my MPG's. I'm currently looking to level my truck and put 285's on her. I'm planning on using a kit from ORU (offroadunlimited.com) and they sell the kit with the longer Bilstein 5100's for a little over $400. I'm also looking at putting in either a Banks Big Hoss kit, or an Edge Juice with Attitude monitor, with the appropriate opening up of airflow. Any one have any suggestions or stories about using either of these 2 particular products? Replies to this message: roughneck (Nov 11, 2005 3:28 pm) stoneg (Nov 11, 2005 3:46 pm) stoneg (Nov 11, 2005 3:41 pm)
#124 of 501 Oil Change by spademan Nov 11, 2005 (12:25 pm)
I have an 01 X-Tended Cab 4x4 with the Allison and D-MAx of course. I live in Iowa where winters are kinda cold. This is my first Diesel and I'm curious to what anybody else is using for engine oils out there. I can't afford Amsoil or Royal Purple, but any info would help. By the way, I get 19 mpg city/ 24 highway. Thanks Replies to this message: roughneck (Nov 11, 2005 3:37 pm) kcram (Nov 13, 2005 5:41 pm)
#125 of 501 Re: 05 D-Max [lt16spdss] by roughneck Nov 11, 2005 (3:28 pm)
Replying to: lt16spdss (Nov 10, 2005 7:13 am) I have a friend with a 2004 ford f-250 with the Edge Juice system, air intake system and aftermarket 4" exhaust. It tore his truck up. He had to put a new tranny in it and just before he got rid of it the motor was running really poor. Ford wouldn't replace the tranny under warranty. Not a cheap tranny for him. Personally I would go with the Banks system and upgrade the tranny with a stouter torque converter or aftermarket perfomace tranny(ATS or BD) along with the other modifications. That's what I want to do to my truck(2004 2500hd duramax). Replies to this message: stoneg (Nov 11, 2005 3:46 pm)
#126 of 501 Re: Oil Change [spademan] by roughneck Nov 11, 2005 (3:37 pm)
Replying to: spademan (Nov 11, 2005 12:25 pm) spademan   I live in wyoming and winters here are pretty cold. It's not uncommon for the high temperature to be below zero. I run Shell synthetic rotella 5w-40 all year. But 10w-40 or 15w-40 should work all right. Make sure you get a diesel motor oil. And I always warm up my d-max for at least 15 min. Replies to this message: kcram (Nov 13, 2005 5:41 pm)
#127 of 501 Re: 05 D-Max [lt16spdss] by stoneg Nov 11, 2005 (3:41 pm)
Replying to: lt16spdss (Nov 10, 2005 7:13 am) Ive got the exact same truck, K&N filter (not the entire intake) already did the leveling kit, 5100's, 285/75/16 BF Goodrich AT TK KO's (had to still trim the front valence a little to keep from rubbing. I did the cat back Banks 4" Stainless Exhaust with the straight thru muffler and the 5" tip. I was having a hard time deciding which programmer to go with also. It was between the Banks or the Edge with attitude. I decided on the Edge for two reasons. (1) I liked the in cab monitor better, and (2)every single person with a D-Max that I met who did install a programmer went with the Edge. I have had absolutely no regrets. I also talked to a diesel specialist (Shivers Diesel)and the Edge was the one he recommended for the D-Max. You are getting some awesome mileage!! I bought mine about 3 months ago, and now have about 6,000 miles, but have NEVER seem mileage like that. Most of my driving is stop and go, but I did level kit 2 days after the purchase, and swap tires within 5 days. Maybe its the tires???(or my heavy foot) My city MPG averages 12.5
#128 of 501 Re: 05 D-Max [roughneck] by stoneg Nov 11, 2005 (3:46 pm)
Replying to: roughneck (Nov 11, 2005 3:28 pm) Every aftermarket shop around here (including the Diesel Specialist) recommends the Superchips for the Powerstroke. My best friend and neighbor has the '04 F250 with the 6.0, 35" BF's, installed the Airade intake, Superchips programmer, and a 4" Exhaust, and loves it. He has had absolutely no problems, and he now has close to 55k on it.
#129 of 501 shocks by roughneck Nov 11, 2005 (4:17 pm)
stoneg    On your Bilstien shocks what was the size of the shocks? How much of a bigger shock did you have to get? I only cranked my torsion bars. I was thinking of going with the Rancho rsx self adjusting shocks or bilstiens. And on the matter of the banks or juice I like the pda system that banks is got better the juice module. But they both sound really good. I just don't have the money to do it right now. Replies to this message: stoneg (Nov 12, 2005 6:57 am)
#130 of 501 Re: shocks [roughneck] by stoneg Nov 12, 2005 (6:57 am)
Replying to: roughneck (Nov 11, 2005 4:17 pm) I'm not sure what the size was on the 5100's, but they made all the difference in the ride. I never turned the torsion bars, I switched the torsion bar keys which lifted the front by 2.5 inches (level). The ride was really rough due to the stock shock not being long enough, so I had them switched out to the 5100's. Yeah, I saw the PDA version, but it made the kit very pricey, and where in the hell would you mount it to where you could actually use it? To me it is too big to mount (and keep everything stock looking), but the display to small. I mounted the Edge monitor in the small console in the dash, and rode my wife around at night with the thing all lit up, and after about a 25 minute ride I had to point it out to her!! Very clean stock look to it. Now before you say she is unobservent, she noticed the truck being level, and totally shocked me when she asked if I lifted the truck. Try Ebay for the programmer..I saved alot of $$$ there on it, and my Banks exhaust.

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