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12-31-2024, 10:18 PM
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#1 |
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Registered User
Join Date: Feb 2003
Location: Bismarck, ND
Posts: 118
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Wiring harness
Kind of a messy question so bear with me. I'm wondering what differences there are between wiring harness for a 67 six cylinder, manual, with no gauges, only lights compared to a 70 350, manual with full tach dash. Can I swap the 70 harness and dash into the 67? For example, is the 67 temp sending unit for dummy lights different than the 70 with gauges? I understand the 70 would have side marker fender lights and 67 would not. Ignition would have accessory on 70 vs 67 that does not. No AC in either truck. What else is different? Thanks for any help.
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1967 Chevrolet 1/2 ton 4x4 1972 GMC 1/2 ton 4x4 2005 1500 4x4 Suburban 2004 GMC Envoy 4x4 (wife's) |
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12-31-2024, 10:38 PM
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#2 |
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Post Whore
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,393
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Re: Wiring harness
The wires to the sensors, coil, and starter likely will be a different length. The guages use different senders than the dummy light senders. (Dummy light senders are actually switches)
On 67's the front turn signal/parking lights use a 67 (Maybe earlier I don’t know for sure) connector that won't plug in to the 68 and up harnesses. The wiper switch is on different sides of the dash bezel between 67 and 70.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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Today, 11:20 AM
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#3 |
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Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,168
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Re: Wiring harness
Can't speak for sure about these trucks, but in most everything GM the plug for a dummy light dash and a gauge dash is the same but a lot of the pin locations are different. I would think if you swapped oil and temp sending units and used all the harness and the dash cluster together then you should be fine.
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'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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Today, 11:43 AM
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#4 |
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All stock and staying that way
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,864
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Re: Wiring harness
The fuse panel arrangement/mounting is totally different on 1967-68 versus 1969 and later.
1967-68: 1969-72:
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1970 K/5 Blazer CST 4WD, Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion..  1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...  2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels Last edited by 1970cstblazer; Today at 12:01 PM. |
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Today, 12:18 PM
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#5 |
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Senior Member
  
Join Date: Jan 2005
Location: CA
Posts: 6,013
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Re: Wiring harness
The front turn signal light connectors will be different.
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