I have a 2000 GMC Jimmy envoy that after changing the distributed cap & Roger & spark plugs & spark plug wires & fuel injection system harness still wants to did when I come to a stop.

SOURCE: 89 s10 blazer no spark

There is no test for module in distributor, but they often cause this kind of problem. Also while in there, check the pickup coil wires to make sure they are intact.

SOURCE: GMC JIMMY NO START BUT GOT SPARK AND FUEL

try the oil pressure switch, that was a common problem on Gm trucks when I used to work on them, the oils switch was bad and woulden't allow it to start and the ones I worked on were on the back of the distributor.

SOURCE: Car dies or loses power

My 1995 died after rain storms and high humidity,my mechanic changed the distribution cap, the wires and ignition and its find now 181,000 and still going strong.

SOURCE: spark plug wires diagram for 91 gmc sierra

ok number 1 piston should be a top dead centre & mabe on the top of the cap is a mark or number
if not then there should be a mark on the lip of the dizzy!
if not then just choose one near the front & set the points at that point on the point of sparking! [ready to open points] make sure you have spark or you may have left ou the insulator on the points locating pin!!!
then its a matter of the firing order!
i hope this helps
cheers Rob

SOURCE: pattern for the spark plug wires to distributer

You didn't specify which size engine you had, so I have included both engine firing orders of your model year...