2003 duramax 6 speed manual mpg

The lack of emissions equipment contributed to relatively high fuel economy. The 2003 through early 2005 manual transmission cummins came equipped with an nv5600 6 speed, with exception to some of the early 2003 nonho that still featured the previous 5 speed nv4500. Since then, the duramax has undergone a variety of changes, modifications, and enhancements, all necessary in the progression and evolution of the engine. Elevated idleexhaust restrictor the engine idle speed with return to normal once the following conditions are met. Up for sale is a 2003 gmc sierra 2500 hd sle duramax with a clean and clear title that is in excellent shape. The newer trucks lly and lbz get around the same, or slightly less due to the emissions equipment. I helped my buddy with his 2015 gmc 2500 duramax having 12 mpg highway and now he is. The only way to get back the loss in fuel mileage is to increase the low. I got around 2021 miles per gallon average speed around 80 to 65 some traffic with stop and go. It is also offered in 5to6passenger 4door extended cab and 4door. Visit and get the latest information, as well as detailed specs and features. Injectors where changed at 119,000 and now at 200,750 it is doing the same thing and they say everything looks ok. Ive seen one in the last 8 months on our lot and it sat for quite awhile before we dealer traded it.

If the 11001400 rpm surge is verified in a manual transmission equipped vehicle please submit a field product report. I just recently did an oil change, replaced the air filter, and also replaced the fuel filter. I have a 2003 duramax 4x4 and usually see 14mpg around town in traffic with stoplights every quarter mile and around 22mpg on the highway cruising at 5560mph. Revised duramax diesel gets uprated to 360 hp and 650 lbft of torque. Dormans qualityengineered auto transmission speed sensor restores peak transmission function. In stock form, there are several distinguishing differences between the two.

Obviously, the actual fuel economy achieved is based on many factors speed. The dorman 917637 transmission input speed sensor is a direct replacement for your 20012011 gm 6. Check out the strong and efficient canyon diesel truck, with fuel economy ratings. The weight of passengers, cargo and options or accessories may reduce the amount you can tow. My 2003 duramax has lost fuel economy from 19 mpg to 14. Although this large displacement engine produces considerable horsepower and torque, it was retired in favor of a more economical engine platform. Epa mpg owner mpg estimates 2003 chevrolet astro 2wd cargo 6 cyl, 4. The truck now has 204k on it and doesnt need anything at all. Chevy silverado and gmc sierra duramax fuel mileage car. Need mpg information on the 2003 chevrolet silverado 3500. Cruise control set at 65 for the whole fricking tank.

So i currently have a 2003 chevrolet 2500hd crew cab 6. A cd player and cruise control are standard on base trim from 2003 on. They may not want to admit that they did not do their homework before buying a tow vehicle that drags a 32 foot trailer. The new 4l80e overdrive automatic or a 5 speed overdrive manual. The chevrolet kodiak and gmc topkick are a range of medium duty trucks that were produced. Looking at epa fueleconomy estimates, a twowheeldrive diesel chevrolet colorados. Epa mpg owner mpg estimates 2003 gmc envoy 2wd 6 cyl, 4. Save money on one of 20 used 2003 gmc sierra 3500s near you. I believe these to be a pretty solid engine and tranny combo but wondering if there is anything i should look out for when driving it, common issues, etc. Duramax lbz fuel mileage mpg trucks, trailers, rvs.

Over the years these trucks have been really good performers, but they do have some common problems that we see over and over again. The lb7 was available mated to the allison five speed automatic transmission or the zf 6 speed manual transmission, with the automatic being a much more common choice. The 6 speed allison automatic or a 6 speed manual transmission was. Towing conditions were 60 mph, predominantly flat highway. I have an 04 duramax that gets poor fuel mileage 12 mpg. It is teamed with a standard 5speed manual transmission except for lt. The guy said it ran out of fuel and he put diesel in it and put air in the tank to prime it back up. We can help you calculate and track your fuel economy. Cc sb 4x4 truck, 6 speed manual, running biodiesel and a chip that advanced the timing. Canyon diesel epa rated at 30 mpg highway gmc life. Gas mileage of 2003 chevrolet silverado fuel economy. Used 2003 gmc sierra 3500 for sale near you edmunds.

Up to 1520% improvement over stock s 100 more miles tank fuel. Much better than my 1500, which i got around 19 or less on highway, and forget about climbing up the hills it was a dog, and towing it did good sense i. Heres the average duramax diesel mpg you can expect for popular trucks. Find a 2003 summit white ls chevrolet silverado 3500 in. Procomp 4 lift with dual shocks and steering stabilizers, 3157516r toyo open country mt tires on 16x10 american eagle wheels, edge evolution tuner, airaid intake, magnaflow performance 4 turbo back dual exhaust with 5 dual wall tips, warn premium manual locking hubs, bushwacker fender.

For 2003, general motors released the thirdgeneration chevrolet. I have owned and drove this truck for a little over 2 years and have put the last 60k miles on it without any problems. Instructions for completing a field product report can be found in bulletin number 020089002d. Gas mileage of 2003 vehicles by chevrolet fuel economy. Also had an 08 dmax 4x4 crew cab stockno mods and it would get about 18 mpgs, but my dads 08 dmax crew is exactly the same except lwb and he gets about 2021 mpgs with no load. I am looking at buying a 2003 duramax that has 124k miles on it. While getting some brake work done, i was thinking of having the transmission flushed. View and download gmc 2003 duramax owners manual online.

The engine is also paired with a sixspeed automatic transmission, which. If your vehicle is equipped with the rpo lly engine, it once engine coolant temperature reaches has a cold. Gas mileage of 2003 chevrolet silverado fueleconomy. This detuning over the past 10 years has caused diesels to drop from 2025 mpg down to new trucks averaging 1416 mpg. On some trims it includes either a sixspeed automatic or sixspeed manual transmission for the same price.

You may feel like your duramax has plenty of power but the fact is emission standards have forced detuning of the lowend power curve of your diesel. Posts on the by nonbelievers cannot or do not want to believe the mileage that a 6. I have a 2003 chevy duramax 2500hd with a 6 speed manual transmission. Plus, your speedometer, cruise control, power steering and other systems that rely on the tss return to maximum performance levels. Requires silverado 3500 hd crew cab 2wd drw with fifthwheel hitch and available duramax 6.