This is Zone # 39 so don't forget there's also the possibility of a vehicle delivery to the GM Proving Grounds in Mesa Arizona!.
Below are all the Dealer Codes I can come up w/ for what's been noted so far...there's a few other dealer possibilities so keep digging!.
Sorry for what codes are incomplete below or any mistakes...if anyone has more or better info, lay it on us!.
~ Pete
Zone # 00 (or no Zone noted)
Dealer Code # 502 (#500 has also been noted)
GM Proving Grounds
Mesa Arizona 85292
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Zone # 39
Dealer Code # 20
Sands Chevrolet
Glendale Arizona
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Zone # 39
Dealer Code # 87 (#88 has also been noted)
Courtesy Chevrolet
1233 E. Camelback Road
Phoenix Arizona 85014
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Zone # 39
Dealer Code # 25?
Midway Chevrolet
Phoenix Arizona
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Zone # 39
Dealer Code # 255
Rudolph Chevrolet
316-400 East Adams
Phoenix Arizona
(Rudolph Chevrolet 3003 N Mesa El Paso Texas
was Zone #39 Dealer Code # 251 )
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Zone # 39
Dealer Code # ?
Chapman Chevrolet
1150 North 54th Street
Chandler, Arizona 85226
* Previously o/a Becker Chevrolet?
Zone # 39
Dealer Code # ?
Chapman Chevrolet
1717 E. Baseline Road
Tempe Arizona 85283
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Zone # 39
Dealer Code # 165
Ray Korte Chevrolet
7224 E. McDowell Rd.
Scottsdale Arizona
85257
(Info Circa 1970)
* Previously o/a Classic Chevrolet?
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Zone # 39
Dealer Code # 23
Brown & Brown Chevrolet
Mesa Arizona
* Previously o/a Brown & Hoye Chevrolet?
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Zone # 39
Dealer Code # 223
O'Rielly Motor Company
East Broadway Blvd.
Tucson Arizona
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Zone # 39
Dealer Code # ?
Murray Bryant Chevrolet
22'nd Street
Tucson Arizon
* Later o/a Watson Chevrolet?