Replacing firewall voltage regulator

Asked by SlothGirl13 Mar 16, 2024 at 08:09 AM about the 1977 Oldsmobile Cutlass

Question type: Shopping & Pricing

The voltage regulator went out on our 77 cutlass supreme. I am having a hard
time finding a replacement. Most places only carry the voltage regulators that
go onto the alternator. Any suggestions to where I could purchase one that
goes on the firewall. TYIA

3 Answers
310,565

Gene answered 9 months ago

EBay has a lot of them, even NOS units. Odd the parts stores don't have any. There are two choices, you can go with the old winding type that is adjustable or with a newer solid state unit, they both attach to the firewall.

Mark helpful
157,855

James answered 9 months ago

By 1977 GM was using voltage regulators integrated inside of the alternator. Are you sure you're looking at the voltage regulator? Please post a picture of what you're seeing. Thanks, Jim

Mark helpful

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