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Old 11-03-2005, 02:08 PM   #1
ol yellow 72
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gauge cluster 3 hole vs. 7 hole

ok my new stupid question is me and my brother both have identical 72 gmc sierras both with factory v-8 automatics, and my question is my truch has a 3 hole cluster and his has a 7 hole, what exactly were the reasions behind why 1 truck got idiot lights and 1 got qauges.
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Old 11-03-2005, 02:52 PM   #2
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Re: gauge cluster 3 hole vs. 7 hole

Quote:
Originally Posted by ol yellow 72
ok my new stupid question is me and my brother both have identical 72 gmc sierras both with factory v-8 automatics, and my question is my truch has a 3 hole cluster and his has a 7 hole, what exactly were the reasions behind why 1 truck got idiot lights and 1 got qauges.

Either it was ordered that way (look at the options list on glove box door) or someone switched the cluster.
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Old 11-03-2005, 03:25 PM   #3
ol yellow 72
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Re: gauge cluster 3 hole vs. 7 hole

ok i see his says gauges and mine dont, so i know it was ordered that way, but was gauges standard or ordered?
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Old 11-03-2005, 03:45 PM   #4
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Re: gauge cluster 3 hole vs. 7 hole

Guages was optional. The only truck that had the guages stock was the Cheyenne super.
I had a 70 CST with the dummy lights and that made a lot of ppl question the originality.
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Old 11-03-2005, 04:04 PM   #5
70rs/ss
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Re: gauge cluster 3 hole vs. 7 hole

Quote:
Originally Posted by ol yellow 72
ok i see his says gauges and mine dont, so i know it was ordered that way, but was gauges standard or ordered?

Gauges were the option, either ordered (by the buyer) or the dealer ordered it that way. Either way the guages are the option, the 3 hole is factory installed (base option)
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Old 11-03-2005, 05:21 PM   #6
ol yellow 72
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Re: gauge cluster 3 hole vs. 7 hole

thanx guys im gonna switch mine imo the 3 holes looks kinda cheep
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Old 11-03-2005, 05:55 PM   #7
Longhorn Man
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Re: gauge cluster 3 hole vs. 7 hole

You'll need to replace or rewire the harness for this.
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Old 11-03-2005, 05:59 PM   #8
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Re: gauge cluster 3 hole vs. 7 hole

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Originally Posted by ol yellow 72
thanx guys im gonna switch mine imo the 3 holes looks kinda cheep
Check with board member 'byrd' and there are a couple others that are very familiar with the gauge clusters and wiring.
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Old 11-03-2005, 06:11 PM   #9
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Re: gauge cluster 3 hole vs. 7 hole

Scroll down on this page. It tells how to change wiring. Courtesy of GMC Paul. John
http://www.gmcpauls.com/Tech%20Tips1.htm

Last edited by john; 11-03-2005 at 06:12 PM.
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Old 11-03-2005, 06:20 PM   #10
ol yellow 72
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Re: gauge cluster 3 hole vs. 7 hole

thanx guy for all the help
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