I recall you can put your on screen computer into a test or engineer mode and it will show actual coolant/trans temps, oil pressure, etc. Anyone recall how to do this?

 

SERVICE PROCEDURE

Check the build date code of the IC. The date code is displayed in the message center during "engineering test mode".

Engineering Test Mode:

Ignition in "OFF" position.
Cluster type.
For Base Clusters (without message center cluster): depress the reset stem on the cluster while turning the ignition switch to the "ON" position.
Message Center Clusters: depress the reset button in the vehicle while turning the ignition switch to the "ON" position.
Continue to hold down the reset stem/button for 5 seconds until the cluster message center displays "engineering test mode".
Press/cycle reset stem/button until the message center displays "manufacture" and the date of manufacture (MM-DD-YYYY).
If the date is after 12/22/2006, this TSB does not apply and proceed with normal diagnostics found in Workshop Manual (WSM), Sections 413-01 and 413-08.
Turn the vehicle ignition to the "OFF" position to exit the "engineering test mode".
Outside Air Temperature (OAT) Diagnostics



Cant recall, but in test mode you can cycle through all the system monitoring options.

 

Will be testing this out! I purchased a monitor just to see the Tranny temps!

 

What monitor did you get?

 

MSD Dashawk. Bought almost 5 years ago. I selected it beause it was user updateable, but then MSD dropped support for it. Its worked fine, and I only use it when I tow.