If you experience this concern and can not isolate the source of the concern, inspect the wiring coming out of the IP relay block for a short to ground. Reports from the field have found issues with harness pictured below and the concern can usually be located 8 inches below the IP relay block.
(See Photo Below) The arrow shows where the harness rubs on the IP relay block support bracket near the holding clip. Remove the harness from the clip and inspect carefully. Repair as needed and insulate the edge to prevent a repeat occurrence.
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. also there is a special policy from gm on the instrument clusters because they keep going dead the number is
|07187C -- SPECIAL COVERAGE ADJUSTMENT - INSTRUMENT PANEL CLUSTER GAUGE NEEDLE FUNCTION|
|Models:||2003-2004 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT |
|2005 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT (U.S. ONLY)|
|2003-2004 CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE |
|2005 CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE (U.S.ONLY)|
|2003-2004 GMC SIERRA, YUKON, YUKON XL|
|2005 GMC SIERRA, YUKON, YUKON XL (U.S. ONLY)|
THIS BULLETIN IS BEING REVISED TO INCLUDE CERTAIN 2005 MODEL YEAR VEHICLES IN THE U.S. ADDITIONALLY, FOR U.S. 2003-2005 MODEL YEAR VEHICLES, GM WILL PROVIDE THE INSTRUMENT PANEL CLUSTER (IPC) ONLY, AT NO CHARGE TO THE CUSTOMER FOR VERIFIED FAILURES BETWEEN 70,001 MILES (110,001 KM) AND 80,000 MILES (130,000 KM). ANY ADDITIONAL COSTS, INCLUDING LABOR TO REPLACE THE INSTRUMENT PANEL CLUSTER, WILL BE THE RESPONSIBILITY OF THE CUSTOMER. DEALERS WILL BE RESPONSIBLE FOR THE RETURN OF THE CUSTOMER'S IPC BACK TO THE ELECTRONIC SERVICE CENTER. PLEASE DISCARD ALL COPIES OF BULLETIN 07187B, ISSUED SEPTEMBER 2008..
if you do a search on the net youll find it also hope this helps