Complete the passport renewal form. This is available at the Guatemalan consulate. They will take photographs of you for the passport at the time of submission.
Submit your expired passport, which will includes details of your place of birth and document numbers.
You must provide the original and a photocopy of the Cedula de Vecindad (Certificate of Residence). If you have lost it and are outside Guatemala then you must get a friend or relative to obtain it from City Hall and mail it to you.
As of 2010, passport renewal payment is $65 and must be paid by exact cash or money order.