1979 gmc high sierra fuel issue - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pobrokefolk · 01-26-2013, 12:27 AM

What's up? So I have a 79 heavy half sierra. Day before yesterday I ran out of gas. So I put gas in it and now it runs for a few seconds then dies. I have no clue what the issue may be. Any suggestions? This is my first older truck and I am not that good and troubleshooting. Suggestions would be appreciated

pwradder · 01-27-2013, 09:10 AM

i'd start with a new fuel filter, running it out of gas may have sucked up some crap and plugged it. good luck with it.

Rider79 · 01-27-2013, 10:15 AM

x2 ^

1979 GMC Sierra · 01-27-2013, 12:51 PM

Check the fuel lines, especially close to the tank...if a line has a kink in it, that's exactly what will happen. I got a new gas tank installed on my 79 GMC, and the gas line got kinked when the tank was raised....i would pump and start, and she'd run for a few seconds and then die.

pobrokefolk · 01-27-2013, 01:05 PM

I changed out the fuel filters. Check the pump, which come to find out is an aftermarket electric pump. It pumps fine. Went under and blew through the lines and I think I found the issue. I think its the part where the two tanks meet. Not sure what it's called tho. I think that piece failed. Thanks for the information.

01-26-2013, 12:27 AM	#1
pobrokefolk Registered User Join Date: Nov 2012 Location: Saint Helens, Oregon Posts: 9	1979 gmc high sierra fuel issue What's up? So I have a 79 heavy half sierra. Day before yesterday I ran out of gas. So I put gas in it and now it runs for a few seconds then dies. I have no clue what the issue may be. Any suggestions? This is my first older truck and I am not that good and troubleshooting. Suggestions would be appreciated

01-27-2013, 09:10 AM	#2
pwradder Registered User Join Date: Mar 2012 Location: stafford springs ct Posts: 149	Re: 1979 gmc high sierra fuel issue i'd start with a new fuel filter, running it out of gas may have sucked up some crap and plugged it. good luck with it. __________________ 1977 srw cc lb 396/700r/4:11's/6'' bds lift/ 35's. sold 1986 suburban 350/700r/3:73's 31's: parted out. 1980 silverado swb 5.3/700r/ 2'' drop/ daily driver. sold 1985 c10 long bed 5.3/700r/2'' drop/17" wheels/ daily driver. sold 1970 c10 long bed-new project! getting ready for the 6.0

01-27-2013, 10:15 AM	#3
Rider79 Registered User Join Date: Oct 2012 Location: Montreal Posts: 6	Re: 1979 gmc high sierra fuel issue x2 ^

01-27-2013, 12:51 PM	#4
1979 GMC Sierra Registered User Join Date: Nov 2010 Location: Niagara, Ontario Posts: 268	Re: 1979 gmc high sierra fuel issue Check the fuel lines, especially close to the tank...if a line has a kink in it, that's exactly what will happen. I got a new gas tank installed on my 79 GMC, and the gas line got kinked when the tank was raised....i would pump and start, and she'd run for a few seconds and then die. __________________ 1979 GMC Sierra 3/4 ton Camper Special 1976 Chevy Cheyenne 3/4 ton

01-27-2013, 01:05 PM	#5
pobrokefolk Registered User Join Date: Nov 2012 Location: Saint Helens, Oregon Posts: 9	Re: 1979 gmc high sierra fuel issue I changed out the fuel filters. Check the pump, which come to find out is an aftermarket electric pump. It pumps fine. Went under and blew through the lines and I think I found the issue. I think its the part where the two tanks meet. Not sure what it's called tho. I think that piece failed. Thanks for the information.



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