Chosen Solution
Gas gauge reads full then empty in secounds
@bot , brad, could be a few things causing this most likely is the fuel sending unit in the tank as GM’s were bad in these years, other possibilities are bad connections, check ground/ plug at fuel pump harness under truck for loose/corrosion,burnt, or interior fuel gage could be faulty. Check the attached trouble shooting links,instruction and guides, Good luck. I hope this helped you out, if so let me know by pressing the helpful button. https://www.chevytrucks.org/tech/gasgaug… http://www.americanautowire.com/view-faq…
