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| | | Forums66 Topics128,056 Posts1,055,798 Members48,426 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Jan 2019 Posts: 328 'Bolter | | 'Bolter Joined: Jan 2019 Posts: 328 | Hello All,
Would anyone know the correct AC Delco model or GM number for a 2 post, 6 volt generator on a 1939 VC model truck? Engine has a 6-1/8" mounting bracket... Thank you.
Philippe Jeanneau
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | | | | | | Joined: Jan 2019 Posts: 328 'Bolter | | 'Bolter Joined: Jan 2019 Posts: 328 | Hello there,
Thank you for the link, looks like a 934 F should be the one... I better double check the voltage regulator and starter also.
Philippe Jeanneau
| | | | | Joined: Apr 2007 Posts: 1,038 'Bolter | | 'Bolter Joined: Apr 2007 Posts: 1,038 | I read that link as indicating the standard generator for a heavy duty truck as 948R, with the 934F as an R.P.O (regular production option). And, the standard heavy duty truck has no voltage regulator, which means it would have a voltage cutout only. The asterix in the R.P.O. box takes you to the bottom of the page which indicates you could get a voltage regulator with current control. Bottom line is you have more choices to keep it "correct". Kent | | | | | Joined: Jan 2019 Posts: 328 'Bolter | | 'Bolter Joined: Jan 2019 Posts: 328 | Hello Kent, I see how I missed that, so the difference between the "Regular" 948R, and the "Regular Production Option-RPO" 934F option is a single post with cutout, or a 2 post unit with a voltage regulator? My other 39 (VB) 1.5 ton has a 948R with a cutout, this one has a voltage regulator that appears original...I will have to inspect what is left of the wiring harness... The other clue is the generator mounting bracket which is about 6-1/8" long...
Philippe Jeanneau
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