2011 Chevrolet
SILVERADOProblems & recalls

This technical bulletin provides a procedure to lube the rear leaf springs on vehicles with the condition of a squeak noise originating from the rear of the vehicle.

Components: SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY. Confirm detailed applicability in the original document.

This Preliminary Information communication provides information to the technician about vehicles that may have a bump feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. The bump clunk issue may be due to fuel movement in the fuel tank when not completely full. The condition is eliminated after completely filling the fuel tank.

Components: FUEL SYSTEM, GASOLINE:STORAGE. Confirm detailed applicability in the original document.

This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its own at a full turn.

Components: SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. Confirm detailed applicability in the original document.

This Preliminary Information communication provides information to the technician about vehicles that within 10 seconds after startup the radio will mute and phone icon displays on the radio for up to 15 seconds and then returns back to normal operation. Technician will need to use the OnStar system to contact an OnStar advisor and request a full unit configuration. Technician will need to contact General Motors Technical Assistance Center if the concern is still present.

Components: EQUIPMENT:ELECTRICAL · EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Confirm detailed applicability in the original document.

This Preliminary Information communication provides the technician with a list of modules to check for communication with the scan tool, if the navigation radio does not display the current Hybrid mode. Dealer will use a scan tool to check communication with Accessory Direct current Power Control Module, Air Condition control module, Drive Motor Generator Power Inverter Module, Engine Control Module, Battery Energy Control Module, and Transfer Case Control Module. Repair the loss of communication with the affected module and the power flow should return to the radio display.

Components: EQUIPMENT. Confirm detailed applicability in the original document.

This Preliminary Information communication provides steps the technician will uses to diagnose and repair vehicles that have low oil pressure after an oil change with the engine Regular Production Option Code L20, L77, L94, L96, L99, L9H, LC8, LC9, LH9, LMF, LMG, LY6, or LZ1. Vehicle may have Service Engine Soon lamp with Diagnostic Trouble Code P0521 or Low Oil Pressure message on the instrument panel. Dealer will need to determine if bulletin 10-06-01-008 was completed. If the bulletin was performed inspect the left rocker cover. Dealer will insure the left rocker can hold water without leaking. If leaks are found apply room temperature vulcanization silicone to the rocker cover if possible or replace the left rocker cover.

Components: ENGINE. Confirm detailed applicability in the original document.

This Preliminary Information communication provides the technician with the additional steps that are needed to help perform a successful brake bleed on the 2-Mode Hybrid with Regular Production Option Code HP2. With a battery maintainer installed on the vehicle use brake pressure bleeder that maintains 30 psi for the entire bleed procedure.

Components: ELECTRICAL SYSTEM:12V/24V/48V BATTERY · SERVICE BRAKES, HYDRAULIC. Confirm detailed applicability in the original document.

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT MAY HAVE A COLD ENGINE TICK NOISE FOR 50 SECONDS AT START UP. TECHNICIAN DETERMINES IF THE TICK NOISE IS POSSIBLY COMING FROM THE EXHAUST MANIFOLD, AS THIS NOISE COULD EASILY BE MISTAKEN FOR AN ENGINE TICK NOISE. IF YOUR SI DIAGNOSIS DOES NOT ISOLATE THE CAUSE OF THIS CONCERN, THIS CONCERN SHOULD BE CONSIDERED A VEHICLE DESIGN CHARACTERISTIC OF THE ECM CALIBRATION AND NO ADDITIONAL REPAIRS SHOULD BE PERFORMED.

Components: ENGINE. Confirm detailed applicability in the original document.

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON VEHICLES THAT MAY HAVE AN INTERMITTENT HIGH IDLE. IF A TECHNICIAN HAS DUPLICATED, OR THE CUSTOMER DESCRIPTION ALIGNS WITH THE SPEEDS MENTIONED IN THE IDLE SPEED DESCRIPTION TABLES, THE IDLE SPEED SHOULD BE CONSIDERED A NORMAL CHARACTERISTIC OF CURRENT VEHICLE DESIGN.

Components: ENGINE · EQUIPMENT. Confirm detailed applicability in the original document.

This informational bulletin provides information on Part Restriction and Ordering Process Information for OnStar Vehicle Communication Interface Modules (VCIM) (GMNA Only)

Components: EQUIPMENT:ELECTRICAL · EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Confirm detailed applicability in the original document.

This preliminary informational bulletin provides a procedure to apply dielectric grease and a piece of adhesive shim stock to the steering angle sensor connector to correct a condition of service stabilitak message displayed in DIC and DTC C0455 or C0710

Components: STEERING · STEERING:ELECTRIC POWER ASSIST SYSTEM. Confirm detailed applicability in the original document.

This technical bulletin provides a procedure to flush and bleed the power steering system to correct a condition of power steering noise or fluid leak from power steering pump, gear or high pressure hose during extreme low temperature conditions.

Components: STEERING:HYDRAULIC POWER ASSIST SYSTEM. Confirm detailed applicability in the original document.