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Old 06-08-2021, 12:22 PM   #1
Captain J
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What are these in 1986 GMC Sierra?

Hello,
Can someone recognize these relays? On top of distributor on the firewall?
On 1986 GMC Sierra C2500 with 7.4L and manual transmission
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1972 GMC Sierra C2500, V8-350
1986 GMC Sierra C2500, V8-454
1986 GMC Sierra C2500, V8-LS1
1986 GMC Sierra K2500, V8-350
1987 GMC Sierra R3500, V8-454
1997 GMC Sierra K2500, V8-454
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Old 06-08-2021, 08:00 PM   #2
bigdaddy4x4
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Re: What are these in 1986 GMC Sierra?

its a fan cooler module relay that runs the front aux.cooling fan that is in front of the radiator it controls that fan when the a/c is running
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Old 06-08-2021, 09:38 PM   #3
Captain J
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Re: What are these in 1986 GMC Sierra?

Quote:
Originally Posted by bigdaddy4x4 View Post
its a fan cooler module relay that runs the front aux.cooling fan that is in front of the radiator it controls that fan when the a/c is running
Hi,
Is that both of the relays?
Do you know the parts #?
Thanks for replying 👋🏻
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1972 GMC Sierra C2500, V8-350
1986 GMC Sierra C2500, V8-454
1986 GMC Sierra C2500, V8-LS1
1986 GMC Sierra K2500, V8-350
1987 GMC Sierra R3500, V8-454
1997 GMC Sierra K2500, V8-454
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Old 06-11-2021, 08:01 PM   #4
Captain J
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Location: H, Q
Posts: 122
Re: What are these in 1986 GMC Sierra?

Any thoughts on these relays?
There part numbers?
Thanks
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1972 GMC Sierra C2500, V8-350
1986 GMC Sierra C2500, V8-454
1986 GMC Sierra C2500, V8-LS1
1986 GMC Sierra K2500, V8-350
1987 GMC Sierra R3500, V8-454
1997 GMC Sierra K2500, V8-454
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