There is a special procedure.
Because doing this wrong will possibly seriously harm your truck I recommend getting a manual from your local Library or buying one.
The diagram of what connector and what connections to short is critical.
Other than that hitch, a timing light and a wrench.
There is a way around this and is more accurate. You need:
These two items allow you to look at the scanner, dial the correct number into the the timing light then adjust the distributor to 0 and you have a accurate easy setting. The plus is you don't have to fight to keep the engine running like the short the terminals method.
At what degree do I set my timing for a 1985 GMC s15 pick-up truck?
how do you set timing on a 1985 350 gmc truck
A timing lamp is needed to set the correct position. In general for most motors you can set the rotation to 5 degrees before top dead center as a good guess of where to position the distributor.
how do i set the timing on a 81 gmc 250 inline 6 cyclinder ?
how do i set the timing on a 1985 yamaha 200 3 wheeler
To set the timing on a 1994 GMC Suburban you need to warm up the engine while the car is either in park or neutral. Next, you adjust the distributor until the timing is set to where you want it.
Click the link.
The computer should set the timing automatically by the sensors. If you change it, it must be done with a handheld computer.
The timing should be set to 10 degrees BTDC.
You dont.
The timing should be set at 0 degrees.
It sets in 0 degrees.