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Increase Your GMC Sierra's MPG

GMC Sierra 1500 Hydrogen Kits

GMC Sierra was originally used and respected by farmers, construction workers and small-business owners. GMC's hauler was a basic workhorse known for its reliability and longevity. Recent times have seen GMC's full-size truck adopt the name Sierra, which was previously an upscale trim level. The GMC Sierra 1500 is fitted with either a 295-hp 4.8-liter V8 or a 315-hp 5.3-liter V8.

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We have hydrogen conversion kits designed for 1999-2007 GMC Sierra 1500s.
Below you will find kits for the 4.3L V6, then the 4.8L V8, and finally the 5.3L V8.

Adding our hydrogen conversion kits to your Sierra
and following our driving tips you can increase your mileage.

Users reporting 20-30% increase with hydrogen kits alone.

GMC Sierra - 4.3L Vortec 4300 V6
This engine is found in the base model of the GMC Sierra. It has 195 hp (145 kW) and 260 lb ft of torque.
It is available with either an automatic or Manual transmission.
You can also find this engine on other Chevy and GM vehicles like the Blazer, S10, and the Astro.

Don't keep losing money out your tailpipe!
Experts say that up to 20% of your fuel goes out your tailpipe as exhaust
or just burned up by your catalytic convertor.

Adding hydrogen to your gas helps your engine burn the gas more efficiently.

GMC Sierra 1500 4.3L drivers average City MPG / Highway MPG

1999 2000 2001 2002 2003 2004 2005 2006 2007

2WD Manual 5-speed 15 / 21 15 / 21 14 / 19 15 / 19 14 / 19 14 / 19 14 / 20 14 / 20 15 / 21

4WD Manual 5-speed 13 / 16 13 / 16 13 / 17 13 / 16 13 / 17 13 / 17 13 / 18 13 / 18 14 / 19

2WD Automatic 4-speed 15 / 21 15 / 19 15 / 20 14 / 18 14 / 19 14 / 19 14 / 19 14 / 19 14 / 20

4WD Automatic 4-speed 14 / 19 14 / 18 14 / 18 13 / 17 13 / 17 13 / 17 13 / 17 13 / 17 14 / 17

* Found on FuelEconomy.gov

Increase the MPG of your GMC Sierra 4.3L V6 and start saving money now!

Year of Sierra 1500 4.3L:
Transmission Type:

GMC Sierra - 4.8L Vortec 4800 V8
This engine has 255 hp (145 kW) and 285 lb ft of torque. It is available with either an automatic or Manual transmission.
Some of the following Chevrolet and GMC vehicles have this engine also: Chevy Tahoes, Chevy Silverado, and GMC Yukon.

Do you know what your mpg is?
Most people's average miles per gallon is less than they think.

GMC Sierra 1500 4.8L drivers average City MPG / Highway MPG

1999 2000 2001 2002 2003 2004 2005 2006 2007

2WD Manual 5-speed 14 / 19 14 / 19 14 / 19 14 / 19 14 / 19 14 / 19 14 / 19 14 / 19 -

4WD Manual 5-speed 13 / 18 13 / 18 13 / 17 12 / 16 13 / 17 13 / 16 14 / 18 14 / 18 -

2WD Automatic 4-speed 14 / 19 14 / 19 14 / 19 14 / 18 14 / 18 14 / 19 14 / 19 14 / 19 14 / 19

4WD Automatic 4-speed 14 / 17 14 / 17 13 / 16 13 / 16 13 / 16 13 / 17 14 / 18 14 / 18 14 / 18

* Found on FuelEconomy.gov

Increase the MPG of your GMC Sierra 4.8L V8 and start saving money now!

Year of Sierra 1500 4.8L:
Transmission Type:

Does your Sierra 1500 have a 5.3L Vortec 5300 V8 engine?

If so, you are not alone. The 5.3L has been the most used engine for the GMC Sierra 1500.
The Vortec 5300 produces 285 hp at 5,200 rpm and 325 lb-ft of torque at 4,000 rpm.
This engine has proven to be reliable and is used on several other Chevy and GM vehicles.

Why should you have to get mileage like this?

GMC Sierra 1500 5.3L drivers average City MPG / Highway MPG

1999 2000 2001 2002 2003 2004 2005 2006 2007

2WD Automatic 4-speed 14 / 19 14 / 19 14 / 18 13 / 17 13 / 17 14 / 18 14 / 19 14 / 19 14 / 19

4WD Automatic 4-speed 13 / 16 13 / 16 13 / 16 13 / 16 13 / 16 13 / 17 13 / 17 13 / 18 13 / 18

* Found on FuelEconomy.gov

2003 GMC Sierra Idle tests:
Measuring the change in GPH (gallons per hour) at idle.

Before Hydrogen After Hydrogen Reduction in GPH

0.42-0.43 GPH 0.28-0.29 GPH 30.95-34.88%

Increase the MPG of your GMC Sierra 5.3L V8 and start saving money now!

Year of Sierra 1500 5.3L:

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