1998-1999 GM Trucks, Suburbans, and Tahoes
1. Locate the convenience center at the firewall just under the emergency brake pedal.
2. At the bottom of the convenience center locate the bottom row of cavities marked:
DRK GRN (Rectangular Shaped)
NAT (Square Shaped)
3. Inside the small square cavity (NAT) are two male spade terminals. The spade terminal on the right is the Stoplight Feed (A).
4. Connect an INSULATED 1/8" female spade terminal to the brake control's RED (stoplight) wire.
5. Connect the female spade terminal to the male terminal specified in STEP 3.
1999 Silverados and Sierra Trucks
GM provided a 6-pin connector for an electronic brake control for the following trim levels:
LS in late 1999 model year production.
LT for all 1999 model year production.
New Style Convenience Center
Find convenience center at the lower left side of the firewall inside the cab.
Remove the cover by unscrewing the large black nut in the center of the cover.
Pull off cover, look at the large cavities at the top. The second cavity (A) from the left will be the 6-pin connector for electronic trailer brakes.
If your truck:
DOES NOT have this style of convenience center, see instructions for 1998-1999 GM Truck, Suburban, and Tahoe.
DOES have this style of convenience center, see instructions below for 1999 New Style Convenience Center
1999 New Style Convenience Center
WITHOUT Trailer Tow Package
This connector will be available on all models without trailer tow option. However, the only wires that are useable at the connector end will be the stoplight (RED) and ground (WHITE). The 12 volt power line (BLACK) and electric trailer brake (BLUE) will terminate just under the vacuum assist outside the firewall. Therefore, the BLACK and BLUE wires will have to be run to the battery
(BLACK) and trailer connector (BLUE). The mating 6-pin connector is available from GM (P/N 12171982) or Tekonsha Towing Systems (P/N 3025) that will interface with the 6-pin connector in the convenience center. Once again this connector will not be fully functional until power (BLACK) is run to the positive side of the battery
through an automatic reset circuit breaker, and the electric trailer brake (BLUE) is connected to the trailer connector at the rear of the vehicle. These wires can be found under the vacuum assist in the engine compartment.
WITH Trailer Tow Package
All vehicles with trailer tow option will have a mating 6-pin connector located in the glove box. Connect the brake control to the mating connector following GM instructions included with the connector.