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Old 10-31-2022, 05:34 PM   #10
wazzabie
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Join Date: Dec 2011
Location: WA
Posts: 366
Re: 1977 K10 fuel sender questions

Quote:
Originally Posted by 3x2GTO View Post
Only HD on my SPID is F60 for springs, my gas gauge reads unleaded fuel only, the truck was originally a stepside, but bed has been replaced with a fleetside one, and has the original gas cap for the fleetside. The gas lines are old and cracking, very possible it's venting through those or elsewhere. Thanks for the info.
I know on an original 78 K5 Blazer w/ federal emission and the HD F60 springs the fuel gauge does not read unleaded fuel only. Does your PID show federal emissions? I think federal emissions is the same as heavy duty emissions.
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