I've searched high and low for a tach signal behind the cluster and can not find anything on colors or pin number. Does anyone have all data or a schematic they could help me out with?
2008 silverado
Much appreciated! !
Ryan

 

2007 Instrument Panel Cluster (IPC)(X88/Z88)

Pin Wire Color Function

1 RD/WH Battery Positive Voltage

2 D-GN/WH DIC Switch Signal

3-4 Not Used

5 PK Ignition 1 Voltage

6 D-GN Low Speed GMLAN Serial Data

7 Not Used

8 YE LED Backlight Dimming Control

9 D-BU Passenger Air Bag On Indicator Control

10 D-GN Passenger Air Bag Off Indicator Control

11 PU Brake Fluid Level Sensor Signal

12 TN Low Washer Fluid Indicator Control

13 BK/WH Ground

14-15 Not Used

16 PK DIC Select Menu Switch Signal

17 Not Used

18 BN/WH MIL Control

19 BN DIC Switch Low Reference

20 PU Passenger Seat Belt Indicator


Maybe this will help, it's for an 07 Silverado.

 

2008 Chevrolet Silverado Remote Start Wiring Diagram
Vehicle Battery Positive Wire (+): Red
Vehicle Battery Positive Wire Location: Ignition Switch Harness
Vehicle Ignition Wire (+): Pink
Vehicle Ignition Wire Location: Ignition Switch Harness
Vehicle Second Ignition Wire (+): White
Vehicle Second Ignition Wire Location: Ignition Switch Harness
Vehicle Accessory Wire (+): Orange
Vehicle Accessory Wire Location: Ignition Switch Harness
Vehicle Second Accessory Wire (+): Brown
Vehicle Second Accessory Wire Location: Ignition Switch Harness
Automobile Engine Starter Wire (+): Yellow
Automobile Engine Starter Wire Location: Ignition Switch Harness
Automobile Second Engine Starter Wire (-): N/A
Automobile Second Engine Starter Wire Location: N/A
Factory Anti-Theft System: Passlock II
Factory Anti-Theft System Type: Key Sends a RF Signal to the BCM Module
Crankshaft Sensor Wire: N/A
Crankshaft Sensor Wire Location: N/A
Camshaft Sensor Wire: N/A
Camshaft Sensor Wire Location: N/A
Car Key Sense Wire (-): Light Green
Car Key Sense Wire Location: Steering Column Harness
Car Neutral Safety Wire (+): N/A
Car Neutral Safety Wire Location: N/A
Car Tachometer Wire (-): White
Car Tachometer Wire Location: At Instrument Cluster
Car Speed Sense Wire: Dark Green/White
Car Speed Sense Wire Location: In Radio Harness
Car Parking Lights Wire (+): Violet
Car Parking Lights Wire Location: At Vehicle Light Switch
Car Brake Lights Wire (+): White
Car Brake Lights Wire Location: At Switch Above the Brake Pedal
Car Reverse Lights Wire (+): Light Green
Car Reverse Lights Wire Location: Pin F in Black Plug At BCM Module
Car Horn Wire (-): Black or Black/Yellow
Car Horn Wire Location: At Steering Column Harness
Car Rear Defrost Wire: N/A
Car Rear Defrost Wire Location: N/A
The 2008 Chevrolet Silverado remote start wire color and location information above is updated as it is submitted by the Modified Life community.


Your tach wire is going to be the white one on the back of your gauge cluster!

 

There is no white wire behind the cluster

 

Everything I have looked at referenced a white wire on the back of the gauge cluster as the tach wire? Oh well, if you have a meter tester you can try this:

The thing to do is to test the signal wire first. Remove the gauge cluster and use a voltmeter to check signal on white wire. Connect black meter lead to ground and red meter lead to white wire and start the engine. Set meter to AC volts scale. Voltage should be fairly low and should increase when the engine rpm is increased.

Read more: http://www.justanswer.com/chevy/70bo...#ixzz3Y0DTHBYk

Ill check with my buddy at the chevrolet dealership tomorrow and get you a wire pinout sheet for your gauge cluster.

 

Okay I texted him and he said it should either be a pink and white wire or pink and black wire. You can test it with a meter if you have one, just to be sure. He also told me the white wire was for the older models.

Hope this helps

 

Ok I'll try it

 

Definitely appreciate the help and I will try this and follow up!!

 

No problem man! and let me know if you still need the wiring diagram