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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: 858
    ...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: 11,152
    Why not use lighter grease/oil? I use 75W-90 in the diffys and they stay pretty smooth even at -41.
    2014 Audi Q7 TDI, 2008 and 2013 Subaru Forester(s), 1969 Chevrolet C20 Pickup, 1969 Ford Econoline 100, 1976 Ford F250 Pickup
  • 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.
  • p100p100 Posts: 1,116
    15.5 MPG sounds about right to me. That's about what I get out of an '06 crew cab Z71, 5.3 liter with 3.73 gears. You are being honest about your mileage, as I am. There are some people who magically get 19-20 MPG out of identical vehicles. They must be measuring mileage when driving down very steep long hills with lots of tailwind.
  • I make an effort to drive in a way to get the best possible gas mileage. It's kind of like when I'm on a road trip, I'm on a mission. I've got the 3.73 gears as well. When I cruise on mostly flat highway at 70-75mph, I regularly get 20-20.5mpg. No magic required, just go easy on the throttle when accelerating. Apparantly extra weight in the bed doesn't have much effect, but towing does. When I tow 4000lbs, I only get around 12mpg.
  • p100p100 Posts: 1,116
    20-20.5 MPG from a 4X4 crew cab truck with 5.3 and 3.73 gears? I do not think it is possible.
  • Ahhh, theres the discrepancy. Mine is 2 wheel drive. I don't know why that makes a differance, but my 4x2 Tacoma gets better mileage than the same model Tacoma 4x4's do as well.
  • bigfurbigfur Posts: 649
    There is no magic when it comes to 4X4 versus 4X2. The 4X4 will always get worse mileage than the 2wd. Only truck i have owned with 4X4 to get over 20mpg on a consistent basis was a 6 cylinder cummins diesel. I think most 4wd 5.3 regardless of rear end get around 15-16, but thats just me and what i have heard from people. :sick:
  • p100p100 Posts: 1,116
    A 4WD truck gets worse gas mileage for several reasons:

    1. 4WD components add about 500 lbs to the weight of a full size truck: front differential and axles, transfer case, front driveshaft, skid plates and heavier shocks/springs, and larger tires.

    2. 4WD trucks generally have higher ground clearance, which means they sit higher and have less favorable aerodynamics. For example, a stock 4WD Z71 Silverado sits about 2.5 inches higher than a 2WD version of the same truck

    3. Most of the time 4WD trucks will have lower gearing to compensate for the added weight, and additional power losses through the drivetrain (when in 4WD)

    4. For some compact pickups, 4 WD versions will come with substantially heavier frames, and suspension components. This was the case with my '95 Nissan 4X4 V6 extended cab pickup, which came with much lower gearing, much bigger tires, heavier frame, and heavier springs than the 2WD version of the same truck. Lately manufacturers have been offering 2WD trucks with 4WD chassis clearance on most models. They have the additional clearance, but do not have the 4WD components, which means less weight. Also, they typically will not have the low gears associated with 4WD trucks. My Nissan had something like 4.23:1 differential gears. I could not get better than 17-18 MPG out of this vehicle. This MPG figure was confirmed by many other owners I talked to.

    5. In the past, when fuel prices were of little concern some 4WD vehicles came without front end locking hubs. The front differential and axles would turn all the time, even when the vehicle was in the 2WD mode. For example, I drove a 1976 Chevy Blazer (full size) with a 350 engine and it would get about 8 MPG in 2 WD! In 4WD the mileage would not drop much. And it did not even have air conditioning.

    Compared to these vehicles, new Chevy 4WD trucks actually get decent fuel economy. New Nissan Titan 4WD gets about 13-14 MPG, new Dodge 4WD with a 5.7 liter Hemi gets about 11-12 MPG. I do not know about Ford F150, but I suspect that the mileage is not that great either.
  • Good post ... We have come a long way since the 70's on mileage ... and power ...
  • noobie1noobie1 Posts: 326
    2002 X-Cab, 8.1L, LB, 4WD, 3.73

    My weekly driving habits have changed recently, adding more stop-n-go. I used to get ~ 12+ mpg, mostly hyway. Last week, 10.99. The best ever recorded was 16 once at high altitude, 469 mi. on 29.1 gal. ( phenomenal ! ). That was when the truck was new with factory 245's on it. It now has 265's. Can't give much info on towing. Mine's hardly worked a day in its life.

  • vp46vp46 Posts: 6
    I have:

    05 Z71 Crew Cab 5.3 L (Black because that is the most fuel efficient color) and with 15k miles on it I've just got the DIC to read 17MPG last week. Otherwise it was stuck at 16.8 for at least 5 months. :shades:

    17 is not bad at all in my book. My mother in-law has an 05 Avalanch 5.3 L (because thats what girls drive) and she is getting 17.4 MPG....she drives it like the old lady she is. ;)
  • I have about 17,000 miles on my 05 silverado 1500 regular cab 2wd with the 4.8L and am getting 18.9 mpg overall. I drive mostly in town and take long highway trips every month or so.
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