GM's Pickup Truck CNG Conversion Costs $11,000

Derek Kreindler
by Derek Kreindler

Compressed natural gas may cost the equivalent of $1.89 per gallon of gasoline, but retrofitting your GMC Sierra or Chevrolet Silverado will cost you $11,000 – and GM still think it will save you money.

According to GM, “…Customers could save $5,000 to $10,000 over a three-year period, depending on their driving habits.” How GM came to this number is a bit of a mystery, and we’re doing some digging to try and figure it out – because it’s a conversion, there is no EPA rating on it and data is difficult to find.

What we did notice was this little tidbit

Businesses are looking for ways to control their costs while reducing vehicle emissions and becoming less dependent on fluctuating gas prices. The low cost of ownership makes these vehicles a realistic solution,

$11,000 is a lot of cash for a business to tie up in one truck. In the absence of any data on how many miles it would take to break even (as well as the gas price number used to come up with it), it appears that GM is hoping to sway buyers with the prospect of unstable or rising fuel prices in the future. Emissions are almost certainly a secondary concern. It’s a wonder that GM didn’t promote the fact that CNG can legitimately claim to be a domestically sourced form of clean energy, seeing as they (barely) did back in March.

We contacted GM to try and get more information on the CNG conversion, and more specifically, how they came to their savings figures. Please leave all accusations of anti-GM bias, skulduggery and wrongdoing in the comments section.

EDIT: General Motors says that they calculated the savings based on a truck driving 24,000 miles a year, with gas prices at $4 per gallon and a CNG gallon equivalent of $2. GM’s Mike Jones, Product Manager for Fleet and Commercial Operations, thinks that there will continue to be “…a pretty significant price separation…” between gasoline and CNG.

Derek Kreindler
Derek Kreindler

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  • Redmondjp Redmondjp on Apr 19, 2012

    Does anybody here know if there are periodic testing/recertification requirements for the CNG tanks, much as there is for SCUBA tanks and compressed gas cylinders? That may affect the payback period slightly as well. I'm just thinking down the road about these CNG vehicles becoming more widely available on the used market, and if they are going to link vehicle registration to having a current tank cert.

    • Nikita Nikita on Apr 19, 2012

      Tanks have a 15 or 20 year rated lifespan. My understanding is that it is based on heavy fleet usage of tree fill cycles a day five days a week.

  • Pinetreepark Pinetreepark on Apr 23, 2012

    The $11,000 price is steep but for people who drive 30,000 miles a year it would be a good option. If these big trucks average 15 mpg then that would be 2000 gal per year at $2 savings is $4000 a year. The return on investment is less than 3 years. The CNG option makes the resale value higher also. Look at the prices for a 2003 cng Silverado (the last full year GM made cng. The big thing is the fluctuation in fuel prices and the expectation for the future. There is a good site that explains this www.cngoco.com The problem isn't the price of the truck, it is the availability of places to but cng!

  • Dave M. The Outback alternates between decent design and goofy design every generation. 2005 was attractive, 2010 goofy. 2015 decent. 2020 good, but the ‘23 refresh hideous.Looking forward to the Outback hybrid in ‘26…..
  • Lorenzo Subaru had the ideal wagon - in 1995. The Legacy Outback was a straight two-box design with rear quarter and back windows you could see out of, and was available in brown with a 5-speed manual, as God and TTAC commenters intended. It's nice they're not raising prices, but when you've lost the plot, does it matter?
  • Bkojote Remember a month a go when Cleveland wanted to create a more walkable Cleveland and TTAC's 'BIG GOVERNMENT IS THE PROBLEM' dumbest and dullest all collectively crapped their diapers? Here's the thing- look on any American highway and it's littered with people who don't /want/ to be driving or shouldn't be. Look at every Becky on her phone during the morning commute in her Tucson, look at every Brad aggro driving his 84 month loan GMC. Hell look how many drivers nowadays can't even operate a headlight switch. You expect these people to understand a stoplight? In my neighborhood alone 4 people have been rear ended at lights from someone on their phone. Distracted driving over the past 10 years has spiked, and it's only going to get worse unless Becky has an alternative, because no judge is going to pull her license when 'she needs it to get to work!' but heaven forbid she not check fb/tiktok for 40 minutes a day.
  • Scott Shouldn't the The Italian Minister for Business be criticizing The Milano for being too ugly to be Italian?Better use of resources doing that....
  • Steve Biro Frankly, while I can do without Eyesight and automatic start-stop, there is generally less B-S with Subarus in terms of design, utility and off-road chops than with many other brands. I just hope that when they adopt Toyota’s hybrid system, they’ll also use Toyota’s eCVT.
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