Service bulletins for the 2008 Chevrolet Silverado
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.
1645 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| PIT4733J | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE. This Preliminary Information communication provides information to the technician that customers may inquire as to the availability of OnStar bluetooth on their vehicle. Technician should be advised that Vehicles with Regular Production Option Code (UPF or UWE) offer Bluetooth through the OnStar system. |
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| PIT4505F | 2017-08-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary Information communication provides information to the technician about vehicles that have a rattle, buzz, tick, or vibration type noise that appears to be coming from the center of the dash. Technician will adjust the transmission dipstick tube away from the front of cowl to provide additional clearance. |
| PIP3720D | 2017-08-15. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. This Preliminary Information communication provides information to the technician with the axel setup information from American Axle Manufacturing. Technician should be advised that the maximum pinion shim to be used or stacked behind the pinion is 0.050?, and the minimum pinion shim is 0.020? for an 8.6 axle. The range for available pinion depth shims for the 10.5? axle is 0.006? to 0.024?. When setting the backlash it should be set between 0.003? to 0.005? on a new ring and pinion for any American Axle Manufacturing application. The ring and pinion can be reused or adjusted if the mileage is less than 500 miles, if not used for towing. Technician should be advised that a ?roller coaster? or ?hourglass? pattern on the bearings may be normal up to 10,000 miles and possibly longer. With a mis-machined housing you may get a heel pattern on both sides of the gear teeth at build up can generally be corrected with backlash adjustments. When setting up an 8.6? axle with a 5 cut gear set is to use a 0.035? pinion shim and set backlash to 0.004?. When using the newer 2 cut gear set also use a 0.035? pinion shim and still set backlash to 0.004?. To set the gear pattern use backlash to adjust the pattern heel to toe. Use the pinion shim to adjust the height of the pattern. The proper drive pinion bearing pre-load is from 15 - 30 inch pounds with new bearings. The total torque to turn after the differential case is installed should increase 5 - 10 inch pounds at the pinion. A new pinion nut must be used whenever the old one is removed. The axle shaft end play specification is 0.012? per side and the radial specification is 0.002? - 0.003?. Technician should be advised that synthetic lube can be used in all new American Axle Manufacturing axle assemblies. The new pinion seal for the 8.6? axle assembly is a two piece design. |
| PIT4979C | 2017-08-15. Service bulletin. FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS; FUEL SYSTEM, GASOLINE. This Preliminary Information communication provides information to the technician about vehicles that have a buzz or rattle type noise during light acceleration around 1200-2000 Revolutions per minute. Technician will need to reposition the fuel line and bracket down away from the floor pan. |
| PIT5161A | 2017-08-15. Service bulletin. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY. 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. |
| PIT4250F | 2017-08-15. Service bulletin. STRUCTURE. This Preliminary Information communication provides information to the technician about vehicles that have water or dust from the openings under the bed rails near the stake pockets. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. |
| PIT4907A | 2017-08-15. Service bulletin. SERVICE BRAKES. This Preliminary Information communication provides information to the technician about brake rotors on new vehicles and replacement parts from General Motors Service Parts Operations. Technician should be advised the costing should not be removed from the brake rotor it will wear off with normal brake usage. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. |
| PIT4815C | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician with additional vehicle speed sensor diagnostic information. Technician may encounter multiple issues when diagnosing a Vehicle Speed Sensor. Technician will find it difficult to follow the speed signal path between the components. To test connect the Fluke meter leads between circuits 821 and 822 and set the meter to Alternating current voltage and then press the hertz button. When the Engine Control Module showing correct miles per hour in the data list however it is setting a Diagnostic Trouble Code for the Vehicle Speed Sensor. To test connect the Fluke meter red lead to circuit 6399 and the black lead to ground, then set the meter to Direct current voltage and press the hertz button. The Instrument Panel Cluster speedo will work correctly when the Engine Control Module or Antilock Braking System Diagnostic Trouble Codes are for the Vehicle Speed Sensor. To test connect the Fluke meter red lead to circuit 1827 and the black lead to ground, then set the meter to Direct current voltage and press the hertz button. When the Antilock Braking System Malfunction Indicator Lamp on with Electronic Brake Control Module Diagnostic Trouble Code C0055 and no other customer complaints, to test connect the Fluke meter red lead to circuit 817 and the black lead to ground, then set the meter to Direct current voltage and press the hertz button. |
| PIT4225F | 2017-08-15. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP; SERVICE BRAKES, ELECTRIC. This Preliminary Information communication provides information to the technician about vehicles that have an Antilock Braking System lamp followed by a Service Stability message in the Drivers Information Center. Technician my find Diagnostic Trouble Code C0710 set in the Electronic Brake Control Module. Technician may or may not find Diagnostic Trouble Code C0455. Technician will need to ensure the steering wheel is properly installed to the steering shaft. |
| PIT3665C | 2017-08-15. Service bulletin. SERVICE BRAKES; SERVICE BRAKES, HYDRAULIC. 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. |
| PIT4208D | 2017-08-15. Service bulletin. SERVICE BRAKES, HYDRAULIC:POWER ASSIST; STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This Preliminary Information communication provides information to the technician about vehicles that may have a power steering pump whine noise. Technician will need to flush and refill the power steering system with Lucas Power Steering Fluid with Conditioners. Technician will replace the power steering pump with the latest design if the fluid is not available. |
| PIP4932B | 2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about vehicles with Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Code P0101. Technician should follow published Service Information diagnostics for any Diagnostic Trouble Codes that are set. If during diagnosis the tech has found that the Airflow Leak Equivalency Ratio or Induction System Leak Indication is above or below the specification the tech will have to carefully check for leaks in the air intake. |
| PIT4978A | 2017-08-15. Service bulletin. AIR BAGS:FRONTAL:SENSOR/CONTROL MODULE-INACTIVE; AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION. This Preliminary Information communication provides information to the technician about vehicles that have a Diagnostic Trouble Code B0081 in the Sensing and Diagnostic Module and Passenger Presence Sensor modules. Technician should inspect the Sensing and Diagnostic Module and Passenger Presence Sensor powers, grounds, and communication circuits at all in line connectors for fully seated, backed out terminals, and proper terminal tension using the correct test probes. |
| PIT4844D | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL; VEHICLE SPEED CONTROL:CRUISE CONTROL; STEERING; ELECTRICAL SYSTEM:WIRING. This Preliminary Information communication provides information to the technician with the installation of Cruise Control on a vehicle which did not come equipped with the option. Technician will need to contact the Techline Customer Support Center to determine if a calibration is available for the vehicle. If they are able to provide a calibration for the vehicle then order steering wheel with cruise control buttons, steering wheel sir coil, and steering column wiring harness. |
| PIT4826B | 2017-08-15. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:PADS; SERVICE BRAKES; SERVICE BRAKES, AIR:DISC:PADS. This Preliminary Information communication provides information to the technician about hairline cracks may be noticed in the pad friction material, when performing a brake inspection. Technician should be advised that the hairline cracks do not affect the operation of the brake system and the pads should not be replaced if only hairline cracks are found. |
| PIC5491A | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL. This Preliminary Information communication provides information to the technician about vehicles that have an OnStar system that will not power up. Technician should turn off the ignition and cancel retained accessory power. After the vehicle has powered down, remove power to the OnStar module for five minutes. After the power has been removed for five minutes, if the OnStar system is working release the vehicle. If the OnStar system is still inoperative continue with published Service Information diagnostics. |
| PIC4935D | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that during battery parasitic drain test, there may be some confusion as to what the normal power consumption reading should be from the OnStar system. Technician should understand the power cycles of the various OnStar systems. All Generation 6, 7, 8, and 9 systems are powered up continuously for 48 hours from ignition off. After 120 hours from ignition off, these systems then completely power off. The Onstar modules draw: * IGN ON - 240 to 400 Milliamp. * IGN OFF - 3 to 20 Milliamp for 48 hours or 120 hours on Gen 9 and vehicle communication platforms. * IGN OFF - 0.2 to 0.8 Milliamp after 48 hours or 120 hours on Gen 9 and vehicle communication platforms. |
| PIT4357F | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES; EQUIPMENT:ELECTRICAL. This Preliminary Information communication provides information to the technician about vehicles that have the content theft alarm is inoperative. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. Technician should be advised that the vehicle must have Keyless Entry Regular Production Option Code (AU0/AU3) and Regular Production Option Code YE9 or Y91 to be equipped with content theft alarm. |
| PIT4169F | 2017-08-15. Service bulletin. SERVICE BRAKES, ELECTRIC; EQUIPMENT:ELECTRICAL. This Preliminary Information communication provides information to the technician about vehicles that have a "Service Stability Message" appears on the Drivers Information Center. Technician will find Diagnostic Trouble Code C0561 set in the Electronic Brake Control Module. Technician will need to address any other Diagnostic Trouble Codes that are set in the vehicle first before working on Diagnostic Trouble Code C0561. |
| PIT3078F | 2017-08-15. Service bulletin. WHEELS:HUB; SUSPENSION:FRONT:HUB. This Preliminary Information communication provides information to the technician about vehicles that have grease leaking from front hub bearings. Technician should not replace the bearing for grease purge. Technician should be advised to not clean the purged grease from the area immediately on or adjacent to the seals because this grease provides additional protection. Technician should only replace the bearing if the seals show visible damage, bearing endplay is greater than 0.005" or 0.13mm, bearing exhibits rough rotation, or bearing exhibits abnormal noise. |
| PIP5071 | 2017-08-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN. This Preliminary Information communication provides information to the technician about vehicle that has a squawk or grunt type noise when shifting from 2nd to 3rd gear. Technician should replace the 3-4 clutch Friction and Steel Clutch Plates along with the Apply Plate and Selective Backing Plate. |
| PIT4089H | 2017-08-15. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; SEATS. This Preliminary Information communication provides information to the technician about vehicles that are unable to set a personalized easy exit seat and/or power tilt column position and they will only move a predetermined amount. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. |
| PIT4506C | 2017-08-15. Service bulletin. TIRES. This Preliminary Information communication provides information to the technician that some owners of Heavy Duty Trucks and Utilities may ask if they can lower their tire pressures. Tire pressures being set to the "Tire and Loading Label" will ensure the safe handling and ride characteristics of the truck and should not be lowered. |
| PIT3099J | 2017-08-15. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. This Preliminary Information communication provides information to the technician about installing General Motors Accessory parts. Technician can check Service Information for some accessories. Technician can also contact Partech for assistance. |
| PIT4228E | 2017-08-15. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; EQUIPMENT:ELECTRICAL. This Preliminary Information communication provides information to the technician about vehicles that have passenger window express down feature is inoperative. Technician should be advised that models equipped with either Memory Seats Regular Production Option Code (AN3) and/or Power Folding Mirrors Regular Production Option Code (DL3) will have the passenger window express down feature. Dealer should advised the customer if the vehicle does not have one of the Regular Production Option Codes AN3 and or DL3, this is a normal operating characteristic. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.