Upon some digging I found this.
1996 LSS 3.8
Lose temperature control for the passenger side at times. OK now. The temperature indicator is flashing, when the condition is present.
Average Reported Mileage:
1. With a capable scan tool, go into Heat Vent Air Conditioning (HVAC) system, check for codes.
2. Code may provide a direction to pursue.
The most common part failure is the HVAC programmer. Without having it verified bad, its a shot in the dark. I hope this helps.
Saturday, November 2nd, 2013 AT 6:31 PM