# Service bulletin PIT\-5508 A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned. - Type: Service bulletin - NHTSA id: 10078887 - Published by NHTSA: 2016\-08\-25 - Manufacturer's number: PIT\-5508 - Manufacturer's date: 2016\-05\-18 - NHTSA component: STEERING:HYDRAULIC POWER ASSIST SYSTEM; EQUIPMENT:APPLIANCE:AIR CONDITIONER ## NHTSA's summary THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON HOW TO DIAGNOSE AND REPAIR VEHICLES WITH ONE OF THE TWO CONCERNS. VEHICLE MAY HAVE AN INTERMITTENT "SERVICE POWER STEERING, DRIVE WITH CARE" ON THE DRIVER INFORMATION CENTER AND A DIAGNOSTIC TROUBLE CODE C0545 SYMPTOM 00 SET IN THE POWER STEERING CONTROL MODULE. OR THE VEHICLE MAY HAVE INOPERATIVE AIR CONDITION CAUSED BY ANY OF THE FOLLOWING DIAGNOSTIC TROUBLE CODE B393B, FUSE F60UA OR F35UA BEING OPEN, OR A POOR AIR CONDITION COMPRESSOR CLUTCH GROUND. TECHNICIAN WILL GAIN ACCESS TO THE WIRE HARNESS UNDER THE AIR CONDITION COMPRESSOR, INSPECT FOR DAMAGE WIRES AND REPAIR THE WIRES. ## The document No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number. ## Components Equipment and accessories, Heating and air conditioning, Steering, Power steering ## Trouble codes named B393B, C0545 ## Vehicles listed - 2015 to 2016 CADILLAC ESCALADE - 2015 to 2016 CADILLAC ESCALADE ESV - 2014 to 2016 CHEVROLET SILVERADO 1500 - 2015 to 2016 CHEVROLET SUBURBAN - 2015 to 2016 CHEVROLET TAHOE - 2014 to 2016 GMC SIERRA 1500 - 2015 to 2016 GMC YUKON - 2015 to 2016 GMC YUKON XL ## Recalls for the same vehicles and component - [18V586000](/recalls/nhtsa/18V586000.md), 2018-09-07: STEERING:ELECTRIC POWER ASSIST SYSTEM - [17V414000](/recalls/nhtsa/17V414000.md), 2017-06-29: STEERING:ELECTRIC POWER ASSIST SYSTEM - [14V719000](/recalls/nhtsa/14V719000.md), 2014-11-10: STEERING:ELECTRIC POWER ASSIST SYSTEM - [14V339000](/recalls/nhtsa/14V339000.md), 2014-06-19: SERVICE BRAKES, HYDRAULIC:POWER ASSIST; STEERING:HYDRAULIC POWER ASSIST SYSTEM ## Other bulletins for the same vehicles and component - [14743B](/bulletins/10247235.md), 2023-12-18, Service bulletin: POWER TRAIN; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; STEERING; STEERING:ELECTRIC POWER ASSIST SYSTEM. Loss of Electric Power Steering \(EPS\) Assist - [120232002A](/bulletins/10245766.md), 2023-12-04, Service bulletin: POWER TRAIN; BACK OVER PREVENTION; STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; STEERING; STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS; STEERING:HYDRAULIC POWER ASSIST:PUMP; SERVICE BRAKES. Power Steering Noise or Fluid Leak from Power Steering Pump, Gear or High Pressure Pressure Hose During Extreme Low Temperature Operation \(Replace Power Steering Fluid\) - [PIT5544B](/bulletins/10147373.md), 2018-11-13, Service bulletin: STEERING; STEERING:ELECTRIC POWER ASSIST SYSTEM. This Preliminary information communicates information on ahydrauilc rush type noise from the power steering gear. This noise is a characteristic of the new Active Hydraulic Assist System RPO NV8 and no repairs should be made. The noise is most noticeable in the cab at idle, in park, with all accessories turned off. - [PIE0430](/bulletins/10140416.md), 2018-06-11, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of a service power steering message displayed and or a power steering fluid leak. - [PIE0430A](/bulletins/10140348.md), 2018-06-11, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; STEERING; STEERING:HYDRAULIC POWER ASSIST SYSTEM. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of a service power steering message displayed and or a power steering fluid leak. - [13\-02\-32\-001C](/bulletins/10138670.md), 2018-05-29, Service bulletin: STEERING; STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This technical bulletin provides a procedure to repair any power steering leak that may be caused from extremely low temperatures and use the recommended fluid. - [PIT5338](/bulletins/10135339.md), 2018-05-07, Service bulletin: ELECTRICAL SYSTEM; STEERING; STEERING:ELECTRIC POWER ASSIST SYSTEM. This Preliminary Information communication provides information to the technician about vehicle that may have a Service Power Steering or Service Hybrid System message displayed on the Driver Information Center, Charging System indicator lamp on, Loss of power steering assist, and or Loss of 12 volt battery power. Technician will need to replace the Accessory DC Power Control Module. - [12\-02\-32\-002A](/bulletins/10134625.md), 2018-04-23, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; STEERING. This technical bulletin provides a revision for 12\-02\-32\-002 to add the 2013\-2014 model years, add noise as a possible condition and add a Note in the Instructions section. - [16\-NA\-313](/bulletins/10118959.md), 2017-10-15, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This informational bulletin provides information on a diagnostic procedure for a fluid leak on the power steering unit. - [16\-NA\-175](/bulletins/10114106.md), 2017-08-15, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This technical bulletin provides a procedure to drain, flush and refill the transmission fluid to correct a customer concern of shake and/or shudder during light throttle acceleration between 48 and 104 KM/H \(30 and 65 MPH\) at a steady state. 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