Anyone have a factory LPG motor? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 09-03-2014, 05:03 PM

I've never seen one... different valves, compression ratio, heat shield, and some other changes. But what about the tank, the injection system, the gauge, etc?

Would love to see photos of a factory setup if one has survived!

Mike C · 09-03-2014, 08:54 PM

I don't think I knew such an animal existed, but I would like to see it as well. I have a '61 John Deere 4010 LP tractor and am absolutely sold on propane as a motor fuel. At least for the frequency that I use the tractor, no fuel issues is awesome.

davepl · 09-03-2014, 08:57 PM

Yes, it's in the options list and is called out as an exception a few times in the shop manual and assembly manual.

I was surprised to see they offered it on multiple motors: 250, 292, and 350. No 400 though.

Back in the 80s in Saskatchewan they went crazy for propane. The quasi-socialist government was paying people to convert. I have no idea why. All I remember is you couldn't park them in parkades. Is that a Canadian word? I mean parking garage.

mitchell72 · 09-03-2014, 11:48 PM

Yeah, my uncle has a 71 or 72, not sure, but it is a Cheyenne, and it has the propane option. He is always telling me it has HARD valves and all this kind of talk. ITs a long bed 1/2 ton, manual with a 350 i believe, nice truck though. Its dark green .

mitchell72 · 09-04-2014, 12:32 AM

My American Light Duty truck book says that in 71 the LPG engine package option was used in 387 light trucks and 6 vans. In 72 the numbers jump to 1,429 and 9 vans.

It would be nice to have one of these especially a 71.

09-03-2014, 05:03 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Anyone have a factory LPG motor? I've never seen one... different valves, compression ratio, heat shield, and some other changes. But what about the tank, the injection system, the gauge, etc? Would love to see photos of a factory setup if one has survived! __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

09-03-2014, 08:54 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: Anyone have a factory LPG motor? I don't think I knew such an animal existed, but I would like to see it as well. I have a '61 John Deere 4010 LP tractor and am absolutely sold on propane as a motor fuel. At least for the frequency that I use the tractor, no fuel issues is awesome. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

09-03-2014, 08:57 PM	#3
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Anyone have a factory LPG motor? Yes, it's in the options list and is called out as an exception a few times in the shop manual and assembly manual. I was surprised to see they offered it on multiple motors: 250, 292, and 350. No 400 though. Back in the 80s in Saskatchewan they went crazy for propane. The quasi-socialist government was paying people to convert. I have no idea why. All I remember is you couldn't park them in parkades. Is that a Canadian word? I mean parking garage. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

09-03-2014, 11:48 PM	#4
mitchell72 Registered User Join Date: Dec 2012 Location: Fontana, Ca Posts: 228	Re: Anyone have a factory LPG motor? Yeah, my uncle has a 71 or 72, not sure, but it is a Cheyenne, and it has the propane option. He is always telling me it has HARD valves and all this kind of talk. ITs a long bed 1/2 ton, manual with a 350 i believe, nice truck though. Its dark green .

09-04-2014, 12:32 AM	#5
mitchell72 Registered User Join Date: Dec 2012 Location: Fontana, Ca Posts: 228	Re: Anyone have a factory LPG motor? My American Light Duty truck book says that in 71 the LPG engine package option was used in 387 light trucks and 6 vans. In 72 the numbers jump to 1,429 and 9 vans. It would be nice to have one of these especially a 71.



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