Trailer Wiring for 2002 GMC Savana Van

Updated 11/09/2026 | Published 11/08/2026

Products Featured in This Question

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

(773)

$38.26

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(12)

$49.92

Curt Trailer Connector Adapter - 4-Way Flat to 5-Way Flat - Vehicle End

(107)

$16.88

Question:

In the past, I purchased a wiring harness for a 2002 ford escape. It was a plug and play type that plugged in between the existing wiring harness and the socket of the taillights. It worked perfect. I need one for a 2002 GMC Sierra van. When I connect a trailer and apply the brakes, it blows the fuse. I see that some of your products come with a transformer. Can you tell me which wiring harness I need to purchase for the van? I saw in a photo of one but I do not think it is correct because it says it is for a Sierra with a factory tow package. This van does not have a factory tow package. I need a harness that will plug into the system at the tail lights. 5 pin flat for the trailer.

asked by: robert h

Expert Reply:

Thanks for letting us help Robert. For your 2002 GMC Savana van, I'd recommend the Curt T-Connector Vehicle Wiring Harness # C55377. This harness plugs directly into your van's existing tail light wiring connectors, so you won't have to cut or splice into the factory wiring. Once installed, it will give you a 4-way flat trailer connector. Unfortunately, we don't currently carry a plug and play harness for your Savana that comes with a 5 way flat connector. However, you can easily add that connection using the Curt Trailer Connector Adapter # C57187. This adapter connects to the 4 way flat provided by the # C55377 and adds the fifth circuit, which you'll need to connect to the appropriate vehicle circuit for your application.

Are you needing the 5 way connector for a boat trailer with surge brakes, or are you using that additional circuit for something else?

expert reply by: Christopher H