ok so now it will crank fine with ingition key. But not getting any spark. Is there kind of test I can do on the ignition coils? I've tested and am getting power and ground to the wires to each side of coil packs. The relay to nelson wiring is clicking at was told it should be. Everything now has a good power and ground but no spark.
Any ideas to what to check would be great. Do these engines have any kind of module like the ones with distributors have? That would cause it not to have spark?
1996 GMC extended cab, 2003 5.3/auto