I have just purchased a used 2003 Chevy Express 3500 cargo van.

I'm looking for service manuals.

All I've found is:
Haynes; Chevrolet and GMC; fill-size vans; 1996-2005

Has anyone other suggestions?

Has anyone found access to Dealer service manuals?

Thank you.

2003 Chevy Express 3500; 6.0L V8

 

If you prefer hard copy, there's nothing like the real factory service manual set available from Helm Inc. (helminc.com). Also, consider an online subscription to alldatadiy.com or eautorepair.net.

 

I'm pretty sure I came across this while looking for a price of $135 + shipping.
Is my best bet at seeing what is in it to go to a dealership? Is this the book the subscriber sites pull from?

 

It contains basically the same information in SI, i.e., diagnostics, diagrams, procedures, etc., in a printed book format. It's assumed that you have a Tech 2 scan tool and J-tools which is funny because you can't do a lot of things with the Tech 2 without the subscription.