Parts Required to Install a 7-Way Connector on 1999 Chevy Blazer

Question:

hello, my 99 chevy blazer has all the relays and fuses plugged in, and had a trailer hitch when I got it, but there is no 7 way round plug. there is a rectangular plug with a blue cover on it clipped to the cross member behind the gas tank, will this harness hook in to that plug or do I need a different part? thanks

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Expert Reply:

The vehicle-side trailer connector # 74682 that you referenced has a round U.S. Car connector intended to mate with a similar plug on Blazers that are equipped with a factory 7-way. Please see the linked photo. This is an OEM replacement for such vehicles. If there is no mating U.S. Car plug on the Blazer you can still have a working 7-way by first installing a 4-pole harness # C55411 which splices into the wiring either on the driver's side frame rail or behind the bumper.

With the 4-pole installed you can then use our kit # ETBC7 for a 7-way. The kit includes the 7-way socket, wiring, connectors and circuit breakers - everything needed for a 7-way.

Several installation videos and articles are linked for your review.

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Adam R

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