This is for a 1999 Venture, but they didn't change anything on a GM as far as I know. My 1999 Bravada DIC is the same as the 1999 Venture and Sierra DICs I have.
Pin #
Usage
Circuit
Color
7
Fused Accessory Feed
43 Yellow
8
Ground
1550 Black
9
Vehicle Speed Signal
389 Dark Green
10
Outside Temperature Sensor Signal
735 Light Green/Black
11
Interior Lamp Dim Signal
8 Gray
12
Park Lamp Switch Output - Park Lamps ON
308 Gray/Black
13
Fuel Level Input
136 Yellow
14
Fused Battery Feed
640 Orange
15
UART Serial Data Communications
800 Tan