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Chevy Silverado and GMC Sierra Real World MPG Numbers



  • shineshine Posts: 20
    Does this option help with MPG I would like to get about 15 witha 4x4. I currently own a Dodge 2500 and am getting about 10
  • ezshift5ezshift5 West coastPosts: 853
    ...but how about a diesel pickup wut has 55 MPG capability?
  • With the 5.3 L engine, you should get 15 - 18 mpg during the summer and 13 - 15 mpg during the winter in a Northern climate. Of course, highway driving, towing, ect. will all impact mpg up or down. In general the GM's are more fuel efficient engines than the Dodges. The 6.0 L engine on a 2500 would put you down on a 10 -12 mpg ballpark.
  • lostwrenchlostwrench Posts: 288
    During the winter,if only we could heat the grease in the wheel bearings and universal joints, and heat the 80-90w oil in the differential, we would not have such a seasonal lowering of miles per gallon.
  • xwesxxwesx Fairbanks, AlaskaPosts: 8,391
    Why not use lighter grease/oil? I use 75W-90 in the diffys and they stay pretty smooth even at -41.
  • jlandjland Posts: 3
    At 80,000 miles on a 1500 extended cab 4x4 with 5.3 the average mpg has been 13.5. Adding a poweraid at 50k and new plugs not too long ago didn't make any noticeable difference in mpg.
  • bouncebounce Posts: 1
    The viscosity in the lubes the Chevys use isn't really the issue, at least not in most of New England, it's simply the gasoline. Unfortunately the "winter mix" formula is different for emissions reasons (more oxygen content etc) and the engines simply don't like it. Most vehicles react to the fuel, but w/ our heavier trucks the results are more pronounced.
  • mtbiker1mtbiker1 Posts: 17
    This past fall we turned in a leased 99 Silverado extended cab/short bed 2WD with 5.3/auto power train, with 50K-plus on the clock. Put a canopy on it at about 1000miles. Around town we got 15-16 mpg most of the time, tho' toward the end of lease seemed to be getting 17 a lot, even including lots of trips to Home Depot. Interstate road trips were 18-19, once nudging 20. Didn't matter what brand of gas we used; the thing ran fine on ARCO 87. My bro-in-law has essentially the same truck but 4WD from 2001 and gets 20 on the highway.
  • jerrywimerjerrywimer Posts: 588
    2004 Silverado Z71 EC SB 5.3l 3.73, ~10,500mi. on the odo so far.

    I've been experimenting with different grades of gas lately. I'd been using Sam's Club 87 octane (they only offer 87 and 93 at my local Sam's) since I bought the truck back in early October last year. My lowest mileage was mid-13's on the first tank- the dealership filled it then let it idle for a few hours while we completed sales paperwork to recharge the dead battery. Otherwise my real lowest has been mid-16's and my best so far has been around 19.6. During the winter I ranged mainly between mid-17 to mid-18's.

    My father also has a 2004 truck, similar to mine (same drivetrain, 16" wheels instead of the 17's I have, slightly different option packages, same drivetrain / body / gearing though) and has sounded frustrated that his truck isn't getting the same mileage mine is. He swears by 93 octane name-brand gas. Which is where my experimenting comes in..

    I put a Fold-a-cover tonneau cover on it just over a month ago, about the same time I decided to start the experiment. I fueled up the first tank after the cover with 93, and ran a total of 3 tanks of it. I then switched back to 87 (since I can't compare pre-tonneau 87 with post-tonneau 93 and call it apples to apples). I'm on the third tank of 87 so far. My lowest average for a tank using the 93 was in the low 18's, and my highest was around 19.5. So far the 87 has been consistently in the low 19's (so no real meaningful difference at this point).

    Once I finish this tank I'm going to repeat the experiment using 6 tanks from the local Shell station. Shell is one of several brands actually recommended for GM vehicles in a TSB that I've seen recently due to the cleaning agents they add, so there might be more to dad's name brand kick than mileage..

    For the record- I do watch the DIC for general comparison's sake as I'm driving, but my actual mileage is manually calculated at the pumps. I record the total mileage, trip (then reset), and gallons of gas to fill up, then calculate the mpg from those numbers. I also try as much as possible to use the same pump. My driving route is mainly home-work-home, ~30 miles each way, 80-85% 65 mph highway, 15-20% rural (2 stoplights, speeds ranging from 30 - 55 mph). For the highway portion I use cruise control to keep speeds as consistent as possible. So hopefully my experiment is controlled well enough that my numbers are relatively reliable.

    BTW, kudos to Chevy for building a 5000+lb 4x4 vehicle that can get almost 20mpg (maybe I'll get lucky and actually break 20 at some point! :shades: )
  • stvstv Posts: 1
    I'am new to this board and its very helpful in finding info. I'am curious if anyone
    out there knows what my mpg might be on this Z71. Its a 2005 silverado 1500 z71
    Regency package with a 4" procomp suspension lift 33" tires and a 4.10
    Gear ratio? The sticker says 15 city and 19 hwy and this reading is for the standard Z71 with a 3.42 gear ratio witch seems to be the standard for all these type trucks.
    Any info would be appreciated.

  • I have a 2500 extended cab, 2WD Long bed with a custom canopy, 5.7L Vortex with 86,000 miles. I have not been able to get more than 10.5 MPG around town, I travel short trips to work (<5 mi. each way) with limited exposure to stop & go traffic.
    I've been considering purchasing the Tornado vortex add on but it seems to be duplication of effort. Any ideas???
  • woofwoof Posts: 27
    As the former owner of a Toyota T100 that consistently got 21-25 MPG (3.4L V6), and one who's spoiled by my VW TDi diesel getting 50 MPG, I've been watching my new '05 Silverado 1500 (4.8L) at every fill-up. Not bad: 17 was the worst and 22 the best so far. Seems to get 20-21 if I don't push it around. GM's push rod V8 is amazing efficient.

    GM's new "on demand" 5.3L promises to be even more efficient. GM really does V8's well...
  • My 00 1500 with 5.3 consistently gets 21-22 mpg hiway. Never have checked it in town. One thing that will help in colder climates is to use synthetic grease in bearings, and synthetic gear oil in cases. I haven't done that, but I'm betting I will improve mileage in winter months.
  • 04cad04cad Posts: 131
    Seems like no matter where I go to have my trucks serviced they don't grease the front end unless I make it a point to call their bluff that new trucks don't have grease fittings. I have taken it to one of the independent grease places, a large discount department chain and yes even my local Chevrolet dealer. I know they have fittings, I found at least three very quickly. My question is exactly how many grease fittings are there on a 2005 Chevrolet 4WD Silverado ext. cab pickup? thanks
  • bigfurbigfur Posts: 649
    2001 1500 5.3 3.73 locker 4X4 cant get above 15.5MPG to save my life. That is with a K&N full intake and flowmaster cat back exhaust. I was hoping to atleast get 17 out of this truck but i havent even come close, not even driving cross country from minnesota to florida. Love the truck,specially the heated seats in minnesota this time of year, but hate the mpg.
  • If you put lets say a turbo or a supercharger on your truck your gas mileage will improve substantully <---(sp). The problem why most people lose MPG when they do this is because they get more power in there hands and they like to push there truck to see what its got. The reason why MPG increases is because the motor produces more power which since the motor produces more power, it has to do less work to turn the tranny and move the truck. Get it?
  • bph1bph1 Posts: 1
    I bought a 2005 4.8L , 2x4 Silverado and put a cap on it. I've been getting about 14-15 mpg consistently. It should be getting 17-21 mpg. Has anyone had this problem and do they have any suggestions?
  • Has anyone out there had any experience with gas mileage on the vortec 8100 engine with 373 or 410 gears. Am interested in gas mileage empty and also pulling a 34 foot 5th wheel.
  • bigfurbigfur Posts: 649
    The figures on the window sticker of my truck (5.3 4x4) said 15-19 i get 14-15. I believe this is why the EPA is going to change how they rate mileage. The window estimates are rarely near the actual mileage. I put on a cat back exhaust system and a K&N full intake...made no differance. I have heard a programmer is good for 2-3mpg but havent got one myself yet.
  • I just got back from a road trip from Sacramento to Los Angeles and back on I-5. On the way down there with the bed empty, cruise set at 80mph most of the way, I got 18.5mpg. Then I loaded up 2000lbs of rubber mats for my wife's horse stalls and headed back, I thought all that weight would kill my gas mileage, set the cruise at 70mph and ended up getting 20.2mpg with 2000lbs in the back! I am totally confused, and yes I know how to check mpg correctly. I guess that driving 10mph slower made a huge differance? Either that or I had a heck of a tailwind?

    2005 Silverado 1500 2wd, ext cab, 5.3 liter.
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