Intermittent Low Coolant Message- keywords accessory body cluster dic display hot indicator instrument lamp level light sensor switch
| Subject: | Intermittent Low Coolant Message |
| Models: | 2007 Cadillac Escalade, ESV, EXT |
| 2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe |
| 2007 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL |
This PI Was Superceded To Include Software. Please Discard PIT4014B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may experience a "low coolant" level message on the DIC at times. The 2007 Full Size Trucks and Utilities are not equipped with a low coolant level sensor. The "low coolant" level message may appear due to a software anomaly with the manual HVAC control head (RPO CJ3)
Recommendation/Instructions:
Please do not replace the Instrument Panel Cluster or HVAC control head to resolve this concern. To correct this concern, reprogram the HVAC control head with updated calibrations. This new service calibration was released with TIS satellite data update version 6.0 available May 30, 2006. As always, make sure your Tech 2® is updated with the latest software version.
If the vehicle is equipped with a auto hvac control head ( RPO CJ2 ), remove the hvac battery fuse ( #38 ) at the underhood buss electrical center for 1 minute and re-install and the concern should not return.
Note: This doesn't apply to vehicles equipped with a Diesel Engine ( RPO LMM)
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
