New to me D860 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**buggy5872** · 12-04-2025, 02:06 PM

Just picked up a 1959 D860. It has the 6-71 Detroit. It is rough but all there. Anyone know where there are any of these for parts? Need some doors or maybe a cab and doors. from what I understand any GMC fat cab 1954-1961 will be the same or close enough cab.

**Pick121** · 02-11-2026, 06:38 PM

Here’s one kinda cool being a 5 window cab. Pretty far from you but maybe worth it, the doors look pretty good
**Edit: Hmm, looking more closely this cab is way different than yours, it has a curved windshield and door contours look way different. Front hood also way different. It’s a 1955 supposedly 450

https://www.facebook.com/marketplace...848513622854/?

**Bob B.** · 02-13-2026, 02:50 AM

The 'fat cabs' are all more-or-less the same, floors, doors, and firewall differ from conventional, short conventional (your D860), and cabover. Neat truck, those were built until 1962 because they still came with the 6-71 Detroit which some fleets preferred. The DB7000 used the 6V-71. In 63 GMC dropped the D860 and made the 6-71 optional in the DB7000.

12-04-2025, 02:06 PM	#1
buggy5872 Senior Member Join Date: Jun 2011 Location: North Beaver TWP PA Posts: 847	New to me D860 Just picked up a 1959 D860. It has the 6-71 Detroit. It is rough but all there. Anyone know where there are any of these for parts? Need some doors or maybe a cab and doors. from what I understand any GMC fat cab 1954-1961 will be the same or close enough cab. __________________ ___________________________ 1959 Apache Short Fleetside, 1959 Apache NAPCO Long Stepside, 1957 5700 LCF Crew Cab "Big Bertha",1959 GMC F370 1958 GMC 600, 1946 Chevy, 1959 Viking 60 LCF 1974 Elcamino SS, 1959 D860 Big Bertha Build

02-11-2026, 06:38 PM	#2
Pick121 Senior Member Join Date: Jan 2021 Location: Tahoe City, CA Posts: 256	Re: New to me D860 Here’s one kinda cool being a 5 window cab. Pretty far from you but maybe worth it, the doors look pretty good *Edit: Hmm, looking more closely this cab is way different than yours, it has a curved windshield and door contours look way different. Front hood also way different. It’s a 1955 supposedly 450 https://www.facebook.com/marketplace...848513622854/? Attached Images __________________ -Pickman (Mike) 1964 C10 Fleetside LWB “George” 1963 C50 “Green Machine” [SOLD] 2019 Silverado 2500HD 2020 Silverado 3500HD My story (Welcome Page) Last edited by Pick121; 02-11-2026 at 06:49 PM. Reason: Left out some info*

02-13-2026, 02:50 AM	#3
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,457	Re: New to me D860 The 'fat cabs' are all more-or-less the same, floors, doors, and firewall differ from conventional, short conventional (your D860), and cabover. Neat truck, those were built until 1962 because they still came with the 6-71 Detroit which some fleets preferred. The DB7000 used the 6V-71. In 63 GMC dropped the D860 and made the 6-71 optional in the DB7000. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.



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