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Ron Z.
Ron Z., - GMC Tech -
Category: GMC
Satisfied Customers: 18963
Experience:  18+yrs experience. State Inspector & GMC Diagnostics/Repair
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I can't find the the place to disconnect the computer from

Customer Question

I can't find the the place to disconnect the computer from the distributor to set the timing correct. I have an early 1988 c1500 truck. there is no discoonnect terminal on the firewall under the relay cover.
Submitted: 1 year ago.
Category: GMC
Expert:  Ron Z. replied 1 year ago.

Disconnect SET TIMING connector (tan/black wire) located in harness close to distributor, in the rear, passenger's side of the engine compartment. Due to the year, the image isn't the best, ***** ***** can give you what I have. CLICK HERE for image. Best bet is to start at the distributor and work you way down the harness.

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Expert:  Ron Z. replied 1 year ago.


Expert:  Ron Z. replied 1 year ago.

Hi Bill,

I was just checking in to see how you made out? Did you find the connector? Did you have any other questions regarding the timing on this vehicle? Please let me know if there's anything more I can do for you here. Thanks!