SP received 4 orders of GP35's totalling 160 units over a two year period. Initially numbered directly after the GP30's, in the 1965 renumbering these were renumbered sequentially after the Cotton Belt (SSW) GP35's.

The MK rebuilt units had a different nose 'red-wing' shape and non-standard numberboard numbers, the CN rebuilt units were exactly as per SP standards. Although the 6300's traveled all over the SP system, their assigned maintenance base was Houston.

The EMD GP35 is a 4-axle diesel-electric locomotive built by General Motors Electro-Motive Division between July 1963 and December 1965 and by General Motors Diesel between May 1964 and January 1966.

Sold to WSOR, to NPR, to WRIX, to OLB, to ARUX.

SP GP35 6533, Tucson, Arizona, November 21, 1985, photo by Chuck Zeiler. Built as SP 7421 in January 1964 (c/n 28475) on EMD Order 7695, it became 6533 after the 1965 systemwide renumbering. It was rebuilt to RL2000 by Republic Locomotive and now is apparently in Jamaica as Jamalco 1012.

GP35 Phases: Phase Ia1- fishbelly frame, groups of three louvers on both battery box doors, seven latched engine doors, short inertial intake, flat dustbin hatch, flat under the front headlight (roads that used rotating lights had a bulge under the numberboard assembly) Type I radiators (the Cannon GP35 rad), lap joint in cab roof, two recesses ...

Southern Pacific (SP) GP35 6554 leads GP20 4084, GP9E 3840 and SD9E 4437 west of Antelope near Roseville, CA on an unknown date in 1978. Photo of SP 6554 at Roseville Neg 1.1.3.7.4A, Scan 2010.3.7.1.7-ph

Railroad Model Craftsman, Mar '96 - Page 71, - Detailing a HO Kato unit for the 70's. RailModel Journal, Jan '95, Page 18 - Diesel Upgrade, Kato SP GP35. Additional S Scale info courtesy James Baglien. This document prepared and maintained by Richard.A.Percy.

To reduce the maintenance on turbochargers, SP rebuilt a number of GP35's with non-turbocharged 645E engines, rated at 2000hp. Not a real success, as far more GP35's were rebuilt keeping their turbo's.

Sep 6, 2019 · "A Southern Pacific locomotive trails two big CNR Alco Centuries as a westbound makes its way past Cardinal 40 summers ago....run-through power is now a common sight on Class 1 railroads but in 1979 this sighting was a rarity."