Need 98 Tahoe Factory Manuals

Does anyone know where I can get a set of the factory manuals for my 98 Tahoe, new or used? Helm no longer makes them available new, and I have not been able to find a used set. I have the Chilton manual, but haven't found it very helpful. Thanks.

See if your local dealer won't sell you a copy. You could also try alldatadiy.com for $25/year/one vehicle you get access to service manual online and TSB's