Re: 1987 GMC Jimmy Temperature Problems
What are you measuring temp with, what gauge?
Btw, if rad is cooler than the thermostat, it will keep fluctuating until it all balances temp wise. At least mine used to.
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'86 C-30 dually, 454/tbh400
'73 K-20 350/350/205 (sold  )
I'm kinda like duct tape- no real purpose, but handy to have around.
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