1972 Chevrolet C10 — costs that mattered more than fuel economy

If it were in my driveway, swap the cheap/easy piece first on the 1972 Chevrolet C10 and see if the fault moves. Save the big job until that test fails. Verbal 'we'll take care of it' is not a plan. I'd rather be boring and correct. If it repeats twice more I'll book time.

Ask what changed right before it started. A pressure test beats staring at a dry driveway if the 1972 Chevrolet C10 is losing coolant with no puddle. That's the branch I'd chase this week. Write the result down so the next test isn't a repeat of the last one. Not driving it hard until I know more.

Log the conditions before you spend. Get a real battery/charging test on the 1972 Chevrolet C10, not just resting voltage, before blaming a module. If the cheap test changes it, stop and reassess. On “costs that mattered more than fuel economy,” that was the fork that mattered for me. Time, temperature, and whether it's in gear are the notes that actually help a shop. This is me being the wet blanket on purpose.