# Service bulletin 3001 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: 10008872 - Published by NHTSA: 2004\-08\-25 - Manufacturer's number: 3001 - Replaces: 3001A - NHTSA component: POWER TRAIN:AXLE ASSEMBLY ## NHTSA's summary THE SERVICE INFORMATION AND OWNERS MANUAL DO NOT SHOW A SERVICE INTERVAL FOR THE 8.6, 9.5, 9.75, 10.5, AND 11.5 INCH REAR AXLES WITH OR WITHOUT G80 \(LOCKING DIFFERENTIAL\). \*TT 2006 ALL GENERAL MOTORS LIGHT DUTY TRUCKS, VANS AND UTILITIES. \*TT ## 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 Transmission and driveline, Axle ## Vehicles listed - 1999 to 2005 CADILLAC ESCALADE - 2002 to 2005 CHEVROLET AVALANCHE - 1999 to 2004 CHEVROLET EXPRESS - 1999 to 2005 CHEVROLET SILVERADO - 1999 to 2005 CHEVROLET SUBURBAN - 1999 to 2005 CHEVROLET TAHOE - 1999 to 2005 GMC SAVANA - 1999 to 2005 GMC SIERRA - 1999 to 2005 GMC YUKON ## Other bulletins for the same vehicles and component - [PIP5168F](/bulletins/10129067.md), 2018-02-21, Service bulletin: POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT; BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a no crank concern. Technician will need to check the valve train for movement when the engine is cranked. If the valve train is not moving while the crankshaft is moving the front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. If the valve train is rotating during inspection, disconnect the Camshaft Position sensor and check if the engine will start. If the engine starts front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. If the engine does not start with the Camshaft Position sensor disconnected the follow published \“Engine Cranks But Does Not Run\” diagnosis in Service Information. Also perform an Engine Compression Test and Cylinder Leakage Test in Service Information documents all results. If the Service Information procedures above isolate an engine mechanical concern then removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. - [06\-00\-89\-026L](/bulletins/10113502.md), 2017-08-15, Service bulletin: SERVICE BRAKES; EQUIPMENT:ELECTRICAL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; EQUIPMENT:APPLIANCE:AIR CONDITIONER; POWER TRAIN:AXLE ASSEMBLY; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. This warranty administration bulletin provide policy information on a revised customer concern not duplicated/verified labor operation numbers and how to submit CCND. - [PIP3720D](/bulletins/10112600.md), 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. - [4030](/bulletins/10021676.md), 2007-06-15, Service bulletin: POWER TRAIN:AXLE ASSEMBLY. NEW DESIGN FRONT AXLE SIDE BEARING ADJUSTERS. \*KB - [702](/bulletins/10016363.md), 2005-09-09, Service bulletin: POWER TRAIN:AXLE ASSEMBLY. THE FACTORY LUBRICANT FILL LEVEL MAY APPEAR LOWER THAN THE PUBLISHED SPECIFICATION ON VEHICLES EQUIPPED WITH THE 11.5\-INCH RING GEAR REAR AXLE ASSEMBLY. \*TT - [3364](/bulletins/10014953.md), 2005-05-12, Service bulletin: POWER TRAIN:AXLE ASSEMBLY. REAR AXLE RETAINER BUTTON BREAKAGE. \*EH - [3294](/bulletins/10013541.md), 2005-04-21, Service bulletin: POWER TRAIN:AXLE ASSEMBLY. HIGHWAY SPEED VIBRATION ON SMOOTH SURFACE. \*EH - [3137](/bulletins/10010612.md), 2004-12-02, Service bulletin: POWER TRAIN:AXLE ASSEMBLY. SERVICE 4WD LIGHT ON AND NO COMMUNICATION WITH TRANSFER CASE CONTROL MODULE. \*EH - [01222A](/bulletins/10007278.md), 2004-06-09, Service bulletin: POWER TRAIN:AXLE HUBS. REPEAT REAR AXLE HUB SEAL LEAK. \*TT - [030419001A](/bulletins/10004717.md), 2004-01-02, Service bulletin: POWER TRAIN:AXLE ASSEMBLY. USE OF SYNTHETIC FRONT AXLE LUBRICANT FOR 4WD VEHICLES SOLD IN COLD WEATHER CLIMATES. \*TT THIS BULLETIN REPLACED PREVIOUS BULLETIN DATED 10/01/2003. \*TT JSON: [/v1/bulletins/10008872](/v1/bulletins/10008872) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%203001&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10008872&vehicle=Service%20bulletin%203001)