1955 GMC 100 & 150 Differences - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ironhill · 08-31-2010, 08:21 PM

Just wondering what the differences were between the GMC 100's and 150's in 1955 to 56. I thought they were the same but I might be wrong. Thanks

raycow · 08-31-2010, 09:19 PM

Mechanically, the V-8 engines are different - 287 in 55 and 316 in 56. I believe the inlines were the same for both years. Bodywise, I can't answer.

Ray

Mr GMC · 09-01-2010, 01:07 AM

The 55 GMC six cylinders were 288 and 370 in 55. The 288 was discontinued in 56. The 55s have a filler panel between the signal and bumper. The custom cabs had this panel chrome and the panel between the bunper guards was chrome also. These were white on standard cab. At the end of 55 they sold 55s as 56s and painted these panels body color. The fillers below the signals were deleted in 56. The lower grill on 56s have a dip in the back (to get your hand to the hood latch easier). The air cleaner on 55 V8s was smaller than 56-59s. The frame on 56-59 GMCs is flared up at the steering box (55s are like a Chevy in that area) for clearance of a power steering box (Chevys did not offer true power steering). 56 and 57s had two big bars that go from the fire wall down to the frame, 55s did not. 55 standard cabs had chrome emblems and 56-59 were painted. 55 custom cab trucks had the steering column and shifter painted interior color and 56-59 they were light grey, also arm rest bases were interior color on 55 and white on 56-59. 55 six cylinder trucks were six volt systems and 56 went to 12 volt with key start (no foot starter like Chevys). The horns on a 55 looked similar to 55-57 Chevys. The 56-59 horns look similar to 58-59 Chevys. I can not think of anything else at the moment, I am sure there are other differances.

sweet70beast · 09-03-2010, 03:41 PM

Is the 100 a shortbox halfton and the 150 a longbox half ton like the Chevy 31 vs 32?

raycow · 09-03-2010, 03:55 PM

No, the 150 is a 3/4 ton. One of them lives near me. It has 8 lug wheels and an H052 rear.

Ray

ironhill · 09-03-2010, 04:06 PM

I was asking because I've seen them both ways 150 as a shortbox. 100 as a shortbox both as 1/2 tons also saw one 150 as a 4x4. Doesn't mean someone hasn't swapped out some emblems or front clips either.

08-31-2010, 08:21 PM	#1
ironhill Registered User Join Date: Jan 2009 Location: Great Falls, MT Posts: 335	1955 GMC 100 & 150 Differences Just wondering what the differences were between the GMC 100's and 150's in 1955 to 56. I thought they were the same but I might be wrong. Thanks

08-31-2010, 09:19 PM	#2
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: 1955 GMC 100 & 150 Differences Mechanically, the V-8 engines are different - 287 in 55 and 316 in 56. I believe the inlines were the same for both years. Bodywise, I can't answer. Ray

09-01-2010, 01:07 AM	#3
Mr GMC Registered User Join Date: Aug 2010 Location: cameron park, ca. Posts: 89	Re: 1955 GMC 100 & 150 Differences The 55 GMC six cylinders were 288 and 370 in 55. The 288 was discontinued in 56. The 55s have a filler panel between the signal and bumper. The custom cabs had this panel chrome and the panel between the bunper guards was chrome also. These were white on standard cab. At the end of 55 they sold 55s as 56s and painted these panels body color. The fillers below the signals were deleted in 56. The lower grill on 56s have a dip in the back (to get your hand to the hood latch easier). The air cleaner on 55 V8s was smaller than 56-59s. The frame on 56-59 GMCs is flared up at the steering box (55s are like a Chevy in that area) for clearance of a power steering box (Chevys did not offer true power steering). 56 and 57s had two big bars that go from the fire wall down to the frame, 55s did not. 55 standard cabs had chrome emblems and 56-59 were painted. 55 custom cab trucks had the steering column and shifter painted interior color and 56-59 they were light grey, also arm rest bases were interior color on 55 and white on 56-59. 55 six cylinder trucks were six volt systems and 56 went to 12 volt with key start (no foot starter like Chevys). The horns on a 55 looked similar to 55-57 Chevys. The 56-59 horns look similar to 58-59 Chevys. I can not think of anything else at the moment, I am sure there are other differances.

09-03-2010, 03:41 PM	#4
sweet70beast Registered User Join Date: Sep 2006 Location: Shelley Idaho Posts: 876	Re: 1955 GMC 100 & 150 Differences Is the 100 a shortbox halfton and the 150 a longbox half ton like the Chevy 31 vs 32? __________________ 1970 Nova 327/T5 (my 1st car) 1971 K-20 350/350/205 (winter DD) 1953 GMC Suburban 1968 Chevy Bel Air 1976 Chev C-10 1972 Skylark (suncoupe) 1 of 3943 made Last edited by sweet70beast; 09-03-2010 at 03:42 PM.

09-03-2010, 03:55 PM	#5
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: 1955 GMC 100 & 150 Differences No, the 150 is a 3/4 ton. One of them lives near me. It has 8 lug wheels and an H052 rear. Ray Last edited by raycow; 09-03-2010 at 03:59 PM.

09-03-2010, 04:06 PM	#6
ironhill Registered User Join Date: Jan 2009 Location: Great Falls, MT Posts: 335	Re: 1955 GMC 100 & 150 Differences I was asking because I've seen them both ways 150 as a shortbox. 100 as a shortbox both as 1/2 tons also saw one 150 as a 4x4. Doesn't mean someone hasn't swapped out some emblems or front clips either.



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