How do i derestrict a nissan primastar van - 2005 GMC Sierra

You need a good auto-electrician. Probably the BCM if you have checked all the fuses.

https://www.motorverso.com/body-control-module-reset/

https://www.google.com/search?q=2006+nissan+primastar+fuse+box+diagram

..

Try https://big-manuals.com/products/renault-trafic-a-k-a-nissan-primastar-opel-vauxhall-vivaro-workshop-service-repair-manual-2001-2013 , it's very helpful in repairing your vehicle

Check fuel pressure at injector rail.
Do It Yourself Diagnosis and Repair

Bad thermostat.
Bad fan belt.

you need to get the barcode on the right side of your radio and tell me the last four digits e.g. A123

try the following.
press accelerator to the floor then turn ignition on so dash lightsd come on, whilst still pressing accelerator to the floor press the brake pedal hard 3 times. this should work.

The heater core needs to be replaced........... It's a pain in the but do it yourself job. The dashboard has to come out..

turn the key on my nissan primastar 07, no glow plug light comes up on the dash, result the engine turns over fine but it won't start any suggestions

you need a new cable for the heater controle about £6 on ebay it is a common problem and is changed in about 5 mins you will need a torax driver to fit your dash cover to remove the part of the dash covering the gear leaver / hazard switch

If there is no free play on the clutch pedal that mean the clutch disc have gone ,or adjust the clutch pedal.