G7 In-tank & Intermediate Harness Kit

The external harness in this kit is designed to replace the factory bulkhead connector and wiring assembly on 1984-1987 Turbo Buicks and many other GM vehicles which have a 3-wire connector assembly.

This external 24" harness has a 3-position Delphi WeatherPack connector which is wired as follows:

A - GROUND - BLACK
B - LEVEL SENDER SIGNAL - VIOLET
C - PUMP POWER - RED (commonly gray on factory GM harnesses)

The in-tank pin-outs are as follows:

C - GROUND
D - LEVEL SENDER SIGNAL
E - PUMP POWER

This harness features:

- Upgraded 14 gauge automotive-grade TXL wire
- A dedicated ground wire which will replace most factory bonded ground wires found on old senders.

When this harness is used in combination with our upgraded in-tank harnesses the overall resistance is reduced from approximately 0.085 to 0.026 ohms.
When using a HP pump (Walbro, Bosch, Denso) this translates to an improvement of approximately 5.4% in pump performance. *

Some vehicles may have different WeatherPack keying or designations. Alternative connectors and / or pin-outs can be special ordered.

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The yellow bulkhead connector is OE equipment and has been pressure tested, fitted with an o-ring seal and supplied with a new SS press-on retaining clip.
The bulkhead connector is a perfect match for the keyed hole the factory G75, G77 and many other G.M. senders so you do not have to drill any holes or make any modifications.

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There are two types of in-tank harnesses available to be purchased with this bulkhead assembly. This kit comes bundled with the following:

• The G77 in-tank harness is designed to work with all 1984-1987 factory Delphi Turbo Buick fuel senders only. This harness is equipped with a Walbro connector and is designed to work with most Walbro GSS series in-tank pumps. This harness combination will upgrade early-model G75-type sender wiring to the newer G77-type wiring.

This in-tank harnesses are designed to be used with our BCWA-G7 Bulkhead Wire and Connector Assembly above. These harnesses feature:

- Heavy-duty gas-safe Teflon wire
- Redundant grounds and grounding clamp
- Level sender wire (compatible with TR G75 and G77-type senders where applicable)

Some senders may have different in-tank wiring configurations however the in-tank connector's terminals can be re-arranged to match with a simple paper clip provided.

* Performance based on load tests simulating 60 PSI operating pressure at 13.5V in combination with manufacturer's published pump voltage vs. flow charts. Harness resistance tests were conducted with sustained 10, 15 and 20 amp loads measured between the WeatherPack connector and the pump's in-tank supply terminals.