Car Alarms: Cliford Matrix SST50.5x alarm, alarmtek, duramax diesel

Question
I have a 2006 GMC pick-up with a Duramax Diesel, some of the wiring of the alarm and remote start are proving a resitance in the glow plug circuit and the alarm needs to be removed prior to warranty work being performed. My question is two part, 1st) where can I obtain the wiring diagrams for this alarm system and 2nd)is there a known fix for this issue.
Thanks.  

Answer
Sorry, we do not service, sell or support
DEI car alarms, keyless entry or remote starter
systems here at ALARMTEK, and as such do not provide
any technical advice for it either.

By mutual agreement with DEI, I do not offer assistnace
to owners of they're products on this site.

CLIFFORD is 1 such DEI product.

However, to get some assistance for your issue with
faulty or malfunctioning DEI equipment, please
go to www.INSTALLSUPPORT.com to see if you
can get some help there, or contact a local DEI dealer
for the support that comes with the system you own.

Good luck with it.

ALARMTEK